Replace uses of StringBuffer with StringBuilder.

StringBuffer is a legacy synchronized class. StringBuilder is a direct replacement to StringBuffer which generally have better performance.

37 files changed, 245 insertions, 245 deletions

diff --git a/bcel-builder/src/main/java/org/aspectj/apache/bcel/classfile/BootstrapMethods.java b/bcel-builder/src/main/java/org/aspectj/apache/bcel/classfile/BootstrapMethods.java
index 699cdc3ef..a1178fbfa 100644
--- a/bcel-builder/src/main/java/org/aspectj/apache/bcel/classfile/BootstrapMethods.java
+++ b/bcel-builder/src/main/java/org/aspectj/apache/bcel/classfile/BootstrapMethods.java
@@ -63,7 +63,7 @@ import org.aspectj.apache.bcel.Constants;
 
 /**
  * Represents the BootstrapMethods attribute in Java 7 classes.
- * 
+ *
  * @author Andy Clement
  */
 public final class BootstrapMethods extends Attribute {
@@ -98,7 +98,7 @@ public final class BootstrapMethods extends Attribute {
 		file.readFully(data);
 		isInPackedState = true;
 	}
-	
+
 	public static class BootstrapMethod {
 		private int bootstrapMethodRef;
 		private int[] bootstrapArguments;
@@ -106,7 +106,7 @@ public final class BootstrapMethods extends Attribute {
 		BootstrapMethod(DataInputStream file) throws IOException {
 			this(file.readUnsignedShort(), readBootstrapArguments(file));
 		}
-		
+
 		private static int[] readBootstrapArguments(DataInputStream dis) throws IOException {
 			int numBootstrapMethods = dis.readUnsignedShort();
 			int[] bootstrapArguments = new int[numBootstrapMethods];
@@ -115,16 +115,16 @@ public final class BootstrapMethods extends Attribute {
 			}
 			return bootstrapArguments;
 		}
-		
+
 		public BootstrapMethod(int bootstrapMethodRef, int[] bootstrapArguments) {
 			this.bootstrapMethodRef = bootstrapMethodRef;
 			this.bootstrapArguments = bootstrapArguments;
 		}
-		
+
 		public int getBootstrapMethodRef() {
 			return bootstrapMethodRef;
 		}
-		
+
 		public int[] getBootstrapArguments() {
 			return bootstrapArguments;
 		}
@@ -137,15 +137,15 @@ public final class BootstrapMethods extends Attribute {
 				file.writeShort(bootstrapArgument);
 			}
 		}
-		
+
 		public final int getLength() {
 			return 2 /*bootstrapMethodRef*/+
 					2 /*number of arguments*/+
 					2 * bootstrapArguments.length;
 		}
-		
+
 	}
-	
+
 	// Unpacks the byte array into the table
 	private void unpack() {
 		if (isInPackedState) {
@@ -169,7 +169,7 @@ public final class BootstrapMethods extends Attribute {
 	/**
 	 * Called by objects that are traversing the nodes of the tree implicitely defined by the contents of a Java class. I.e., the
 	 * hierarchy of methods, fields, attributes, etc. spawns a tree of objects.
-	 * 
+	 *
 	 * @param v Visitor object
 	 */
 	@Override
@@ -180,7 +180,7 @@ public final class BootstrapMethods extends Attribute {
 
 	/**
 	 * Dump line number table attribute to file stream in binary format.
-	 * 
+	 *
 	 * @param file Output file stream
 	 * @throws IOException
 	 */
@@ -210,8 +210,8 @@ public final class BootstrapMethods extends Attribute {
 	@Override
 	public final String toString() {
 		unpack();
-		StringBuffer buf = new StringBuffer();
-		StringBuffer line = new StringBuffer();
+		StringBuilder buf = new StringBuilder();
+		StringBuilder line = new StringBuilder();
 
 		for (int i = 0; i < numBootstrapMethods; i++) {
 			BootstrapMethod bm = bootstrapMethods[i];
@@ -228,8 +228,8 @@ public final class BootstrapMethods extends Attribute {
 					line.append(arg).append("(").append(getConstantPool().getConstant(arg)).append(") ");
 				}
 			}
-			
-			
+
+
 			if (i < numBootstrapMethods - 1) {
 				line.append(", ");
 			}
diff --git a/bcel-builder/src/main/java/org/aspectj/apache/bcel/classfile/Code.java b/bcel-builder/src/main/java/org/aspectj/apache/bcel/classfile/Code.java
index 10dbf8ffc..5f6af4518 100644
--- a/bcel-builder/src/main/java/org/aspectj/apache/bcel/classfile/Code.java
+++ b/bcel-builder/src/main/java/org/aspectj/apache/bcel/classfile/Code.java
@@ -64,10 +64,10 @@ import org.aspectj.apache.bcel.Constants;
  * This class represents a chunk of Java byte code contained in a method. It is instantiated by the
  * <em>Attribute.readAttribute()</em> method. A <em>Code</em> attribute contains informations about operand stack, local variables,
  * byte code and the exceptions handled within this method.
- * 
+ *
  * This attribute has attributes itself, namely <em>LineNumberTable</em> which is used for debugging purposes and
  * <em>LocalVariableTable</em> which contains information about the local variables.
- * 
+ *
  * @version $Id: Code.java,v 1.9 2009/10/05 17:35:36 aclement Exp $
  * @author <A HREF="mailto:markus.dahm@berlin.de">M. Dahm</A>
  * @see Attribute
@@ -149,7 +149,7 @@ public final class Code extends Attribute {
 	/**
 	 * Called by objects that are traversing the nodes of the tree implicitely defined by the contents of a Java class. I.e., the
 	 * hierarchy of methods, fields, attributes, etc. spawns a tree of objects.
-	 * 
+	 *
 	 * @param v Visitor object
 	 */
 	@Override
@@ -159,7 +159,7 @@ public final class Code extends Attribute {
 
 	/**
 	 * Dump code attribute to file stream in binary format.
-	 * 
+	 *
 	 * @param file Output file stream
 	 * @throws IOException
 	 */
@@ -309,9 +309,9 @@ public final class Code extends Attribute {
 	 * @return String representation of code chunk.
 	 */
 	public final String toString(boolean verbose) {
-		StringBuffer buf;
+		StringBuilder buf;
 
-		buf = new StringBuffer("Code(max_stack = " + maxStack + ", max_locals = " + maxLocals + ", code_length = " + code.length
+		buf = new StringBuilder("Code(max_stack = " + maxStack + ", max_locals = " + maxLocals + ", code_length = " + code.length
 				+ ")\n" + Utility.codeToString(code, cpool, 0, -1, verbose));
 
 		if (exceptionTable.length > 0) {
@@ -348,7 +348,7 @@ public final class Code extends Attribute {
 	// Code c = (Code)clone();
 	// c.code = (byte[])code.clone();
 	// c.cpool = constant_pool;
-	//  
+	//
 	// c.exceptionTable = new CodeException[exceptionTable.length];
 	// for(int i=0; i < exceptionTable.length; i++)
 	// c.exceptionTable[i] = exceptionTable[i].copy();
@@ -365,7 +365,7 @@ public final class Code extends Attribute {
 	 * whether two pieces of code are equivalent.
 	 */
 	public String getCodeString() {
-		StringBuffer codeString = new StringBuffer();
+		StringBuilder codeString = new StringBuilder();
 		codeString.append("Code(max_stack = ").append(maxStack);
 		codeString.append(", max_locals = ").append(maxLocals);
 		codeString.append(", code_length = ").append(code.length).append(")\n");
diff --git a/bcel-builder/src/main/java/org/aspectj/apache/bcel/classfile/ConstantPool.java b/bcel-builder/src/main/java/org/aspectj/apache/bcel/classfile/ConstantPool.java
index 4609a3e09..2066b4569 100644
--- a/bcel-builder/src/main/java/org/aspectj/apache/bcel/classfile/ConstantPool.java
+++ b/bcel-builder/src/main/java/org/aspectj/apache/bcel/classfile/ConstantPool.java
@@ -136,7 +136,7 @@ public class ConstantPool implements Node {
 	/**
 	 * Get string from constant pool and bypass the indirection of `ConstantClass' and `ConstantString' objects. I.e. these classes
 	 * have an index field that points to another entry of the constant pool of type `ConstantUtf8' which contains the real data.
-	 * 
+	 *
 	 * @param index Index in constant pool
 	 * @param tag Tag of expected constant, either ConstantClass or ConstantString
 	 * @return Contents of string reference
@@ -207,7 +207,7 @@ public class ConstantPool implements Node {
 			str = (constantToString(((ConstantCP) c).getClassIndex(), Constants.CONSTANT_Class) + "." + constantToString(
 					((ConstantCP) c).getNameAndTypeIndex(), Constants.CONSTANT_NameAndType));
 			break;
-			
+
 		case Constants.CONSTANT_InvokeDynamic:
 			ConstantInvokeDynamic cID = ((ConstantInvokeDynamic)c);
 			return "#"+cID.getBootstrapMethodAttrIndex()+"."+constantToString(cID.getNameAndTypeIndex(), Constants.CONSTANT_NameAndType);
@@ -237,7 +237,7 @@ public class ConstantPool implements Node {
 
 	private static final String escape(String str) {
 		int len = str.length();
-		StringBuffer buf = new StringBuffer(len + 5);
+		StringBuilder buf = new StringBuilder(len + 5);
 		char[] ch = str.toCharArray();
 
 		for (int i = 0; i < len; i++) {
@@ -296,7 +296,7 @@ public class ConstantPool implements Node {
 		assert c.tag == Constants.CONSTANT_Utf8;
 		return (ConstantUtf8) c;
 	}
-	
+
 	public ConstantModule getConstantModule(int index) {
 		Constant c = getConstant(index);
 		assert c != null;
@@ -323,7 +323,7 @@ public class ConstantPool implements Node {
 
 	@Override
 	public String toString() {
-		StringBuffer buf = new StringBuffer();
+		StringBuilder buf = new StringBuilder();
 
 		for (int i = 1; i < poolSize; i++)
 			buf.append(i + ")" + pool[i] + "\n");
@@ -441,7 +441,7 @@ public class ConstantPool implements Node {
 
 	public int lookupFieldref(String searchClassname, String searchFieldname, String searchSignature) {
 		searchClassname = searchClassname.replace('.', '/');
-		String k = new StringBuffer().append(searchClassname).append(searchFieldname).append(searchSignature).toString();
+		String k = new StringBuilder().append(searchClassname).append(searchFieldname).append(searchSignature).toString();
 		Integer pos = fieldCache.get(k);
 		if (pos != null)
 			return pos;
@@ -621,7 +621,7 @@ public class ConstantPool implements Node {
 
 			return addNameAndType(u8.getValue(), u8_2.getValue());
 		}
-		
+
 		case Constants.CONSTANT_InvokeDynamic: {
 			ConstantInvokeDynamic cid = (ConstantInvokeDynamic)c;
 			int index1 = cid.getBootstrapMethodAttrIndex();
@@ -631,7 +631,7 @@ public class ConstantPool implements Node {
 			int index2 = addNameAndType(name.getValue(), signature.getValue());
 			return addInvokeDynamic(index1,index2);
 		}
-		
+
 		case Constants.CONSTANT_MethodHandle:
 			ConstantMethodHandle cmh = (ConstantMethodHandle)c;
 			return addMethodHandle(cmh.getReferenceKind(),addConstant(constants[cmh.getReferenceIndex()],cp));
@@ -650,7 +650,7 @@ public class ConstantPool implements Node {
 
 		case Constants.CONSTANT_Integer:
 			return addInteger(((ConstantInteger) c).getValue());
-			
+
 		case Constants.CONSTANT_MethodType:
 			ConstantMethodType cmt = (ConstantMethodType)c;
 			return addMethodType(addConstant(constants[cmt.getDescriptorIndex()],cp));
@@ -689,14 +689,14 @@ public class ConstantPool implements Node {
 			throw new RuntimeException("Unknown constant type " + c);
 		}
 	}
-	
+
 	public int addMethodHandle(byte referenceKind, int referenceIndex) {
 		adjustSize();
 		int ret = poolSize;
 		pool[poolSize++] = new ConstantMethodHandle(referenceKind, referenceIndex);
 		return ret;
 	}
-	
+
 	public int addMethodType(int descriptorIndex) {
 		adjustSize();
 		int ret = poolSize;
@@ -718,7 +718,7 @@ public class ConstantPool implements Node {
 		pool[poolSize++] = new ConstantMethodref(class_index, name_and_type_index);
 		return ret;
 	}
-	
+
 	public int addInvokeDynamic(int bootstrapMethodIndex, int constantNameAndTypeIndex) {
 		adjustSize();
 		int ret = poolSize;
@@ -768,7 +768,7 @@ public class ConstantPool implements Node {
 	}
 
 	public int lookupMethodref(String searchClassname, String searchMethodName, String searchSignature) {
-		String key = new StringBuffer().append(searchClassname).append(searchMethodName).append(searchSignature).toString();
+		String key = new StringBuilder().append(searchClassname).append(searchMethodName).append(searchSignature).toString();
 		Integer cached = methodCache.get(key);
 		if (cached != null)
 			return cached;
@@ -813,4 +813,4 @@ public class ConstantPool implements Node {
 	public String getPackageName(int packageIndex) {
 		return getConstantPackage(packageIndex).getPackageName(this);
 	}
-}
\ No newline at end of file
+}
diff --git a/bcel-builder/src/main/java/org/aspectj/apache/bcel/classfile/ExceptionTable.java b/bcel-builder/src/main/java/org/aspectj/apache/bcel/classfile/ExceptionTable.java
index ad7d43f2e..adb796249 100644
--- a/bcel-builder/src/main/java/org/aspectj/apache/bcel/classfile/ExceptionTable.java
+++ b/bcel-builder/src/main/java/org/aspectj/apache/bcel/classfile/ExceptionTable.java
@@ -64,7 +64,7 @@ import org.aspectj.apache.bcel.Constants;
  * This class represents the table of exceptions that are thrown by a method. This attribute may be used once per method. The name
  * of this class is <em>ExceptionTable</em> for historical reasons; The Java Virtual Machine Specification, Second Edition defines
  * this attribute using the name <em>Exceptions</em> (which is inconsistent with the other classes).
- * 
+ *
  * @version $Id: ExceptionTable.java,v 1.5 2009/09/15 19:40:12 aclement Exp $
  * @author <A HREF="mailto:markus.dahm@berlin.de">M. Dahm</A>
  * @see Code
@@ -94,7 +94,7 @@ public final class ExceptionTable extends Attribute {
 
 	/**
 	 * Construct object from file stream.
-	 * 
+	 *
 	 * @param name_index Index in constant pool
 	 * @param length Content length in bytes
 	 * @param file Input stream
@@ -114,7 +114,7 @@ public final class ExceptionTable extends Attribute {
 	/**
 	 * Called by objects that are traversing the nodes of the tree implicitely defined by the contents of a Java class. I.e., the
 	 * hierarchy of methods, fields, attributes, etc. spawns a tree of objects.
-	 * 
+	 *
 	 * @param v Visitor object
 	 */
 	@Override
@@ -124,7 +124,7 @@ public final class ExceptionTable extends Attribute {
 
 	/**
 	 * Dump exceptions attribute to file stream in binary format.
-	 * 
+	 *
 	 * @param file Output file stream
 	 * @throws IOException
 	 */
@@ -173,7 +173,7 @@ public final class ExceptionTable extends Attribute {
 	 */
 	@Override
 	public final String toString() {
-		StringBuffer buf = new StringBuffer("");
+		StringBuilder buf = new StringBuilder("");
 		String str;
 
 		for (int i = 0; i < number_of_exceptions; i++) {
diff --git a/bcel-builder/src/main/java/org/aspectj/apache/bcel/classfile/Field.java b/bcel-builder/src/main/java/org/aspectj/apache/bcel/classfile/Field.java
index f34464375..2d3c276b5 100644
--- a/bcel-builder/src/main/java/org/aspectj/apache/bcel/classfile/Field.java
+++ b/bcel-builder/src/main/java/org/aspectj/apache/bcel/classfile/Field.java
@@ -61,7 +61,7 @@ import org.aspectj.apache.bcel.generic.Type;
 /**
  * This class represents the field info structure, i.e., the representation for a variable in the class. See JVM specification for
  * details.
- * 
+ *
  * @version $Id: Field.java,v 1.6 2009/09/15 03:33:52 aclement Exp $
  * @author <A HREF="mailto:markus.dahm@berlin.de">M. Dahm</A>
  */
@@ -103,7 +103,7 @@ public final class Field extends FieldOrMethod {
 	@Override
 	public final String toString() {
 		// Get names from constant pool
-		StringBuffer buf = new StringBuffer(Utility.accessToString(modifiers));
+		StringBuilder buf = new StringBuilder(Utility.accessToString(modifiers));
 		if (buf.length() > 0) {
 			buf.append(" ");
 		}
diff --git a/bcel-builder/src/main/java/org/aspectj/apache/bcel/classfile/InnerClasses.java b/bcel-builder/src/main/java/org/aspectj/apache/bcel/classfile/InnerClasses.java
index 0078156ed..16a609814 100644
--- a/bcel-builder/src/main/java/org/aspectj/apache/bcel/classfile/InnerClasses.java
+++ b/bcel-builder/src/main/java/org/aspectj/apache/bcel/classfile/InnerClasses.java
@@ -63,7 +63,7 @@ import org.aspectj.apache.bcel.Constants;
 /**
  * This class is derived from <em>Attribute</em> and denotes that this class is an Inner class of another. to the source file of
  * this class. It is instantiated from the <em>Attribute.readAttribute()</em> method.
- * 
+ *
  * @version $Id: InnerClasses.java,v 1.5 2009/09/15 19:40:12 aclement Exp $
  * @author <A HREF="mailto:markus.dahm@berlin.de">M. Dahm</A>
  * @see Attribute
@@ -94,7 +94,7 @@ public final class InnerClasses extends Attribute {
 
 	/**
 	 * Construct object from file stream.
-	 * 
+	 *
 	 * @param name_index Index in constant pool to CONSTANT_Utf8
 	 * @param length Content length in bytes
 	 * @param file Input stream
@@ -114,7 +114,7 @@ public final class InnerClasses extends Attribute {
 	/**
 	 * Called by objects that are traversing the nodes of the tree implicitely defined by the contents of a Java class. I.e., the
 	 * hierarchy of methods, fields, attributes, etc. spawns a tree of objects.
-	 * 
+	 *
 	 * @param v Visitor object
 	 */
 	@Override
@@ -124,7 +124,7 @@ public final class InnerClasses extends Attribute {
 
 	/**
 	 * Dump source file attribute to file stream in binary format.
-	 * 
+	 *
 	 * @param file Output file stream
 	 * @throws IOException
 	 */
@@ -157,7 +157,7 @@ public final class InnerClasses extends Attribute {
 	 */
 	@Override
 	public final String toString() {
-		StringBuffer buf = new StringBuffer();
+		StringBuilder buf = new StringBuilder();
 
 		for (int i = 0; i < number_of_classes; i++)
 			buf.append(inner_classes[i].toString(cpool) + "\n");
diff --git a/bcel-builder/src/main/java/org/aspectj/apache/bcel/classfile/JavaClass.java b/bcel-builder/src/main/java/org/aspectj/apache/bcel/classfile/JavaClass.java
index a1a7a57de..0be2b8ae5 100644
--- a/bcel-builder/src/main/java/org/aspectj/apache/bcel/classfile/JavaClass.java
+++ b/bcel-builder/src/main/java/org/aspectj/apache/bcel/classfile/JavaClass.java
@@ -77,10 +77,10 @@ import org.aspectj.apache.bcel.util.SyntheticRepository;
 /**
  * Represents a Java class, i.e., the data structures, constant pool, fields, methods and commands contained in a Java .class file.
  * See <a href="ftp://java.sun.com/docs/specs/">JVM specification</a> for details.
- * 
+ *
  * The intent of this class is to represent a parsed or otherwise existing class file. Those interested in programatically
  * generating classes should see the <a href="../generic/ClassGen.html">ClassGen</a> class.
- * 
+ *
  * @version $Id: JavaClass.java,v 1.22 2009/09/15 19:40:14 aclement Exp $
  * @see org.aspectj.apache.bcel.generic.ClassGen
  * @author <A HREF="mailto:markus.dahm@berlin.de">M. Dahm</A>
@@ -185,7 +185,7 @@ public class JavaClass extends Modifiers implements Cloneable, Node {
 	/**
 	 * Called by objects that are traversing the nodes of the tree implicitely defined by the contents of a Java class. I.e., the
 	 * hierarchy of methods, fields, attributes, etc. spawns a tree of objects.
-	 * 
+	 *
 	 * @param v Visitor object
 	 */
 	public void accept(ClassVisitor v) {
@@ -194,7 +194,7 @@ public class JavaClass extends Modifiers implements Cloneable, Node {
 
 	/**
 	 * Dump class to a file.
-	 * 
+	 *
 	 * @param file Output file
 	 * @throws IOException
 	 */
@@ -209,7 +209,7 @@ public class JavaClass extends Modifiers implements Cloneable, Node {
 
 	/**
 	 * Dump class to a file named file_name.
-	 * 
+	 *
 	 * @param file_name Output file name
 	 * @exception IOException
 	 */
@@ -523,7 +523,7 @@ public class JavaClass extends Modifiers implements Cloneable, Node {
 		String access = Utility.accessToString(modifiers, true);
 		access = access.equals("") ? "" : access + " ";
 
-		StringBuffer buf = new StringBuffer(access + Utility.classOrInterface(modifiers) + " " + classname + " extends "
+		StringBuilder buf = new StringBuilder(access + Utility.classOrInterface(modifiers) + " " + classname + " extends "
 				+ Utility.compactClassName(superclassname, false) + '\n');
 		int size = interfaces.length;
 
@@ -580,7 +580,7 @@ public class JavaClass extends Modifiers implements Cloneable, Node {
 
 	private static final String indent(Object obj) {
 		StringTokenizer tok = new StringTokenizer(obj.toString(), "\n");
-		StringBuffer buf = new StringBuffer();
+		StringBuilder buf = new StringBuilder();
 
 		while (tok.hasMoreTokens()) {
 			buf.append("\t" + tok.nextToken() + "\n");
@@ -671,7 +671,7 @@ public class JavaClass extends Modifiers implements Cloneable, Node {
 
 	/**
 	 * Equivalent to runtime "instanceof" operator.
-	 * 
+	 *
 	 * @return true if this JavaClass is derived from teh super class
 	 */
 	public final boolean instanceOf(JavaClass super_class) {
diff --git a/bcel-builder/src/main/java/org/aspectj/apache/bcel/classfile/LineNumberTable.java b/bcel-builder/src/main/java/org/aspectj/apache/bcel/classfile/LineNumberTable.java
index 871bfe6bf..ee852cf23 100644
--- a/bcel-builder/src/main/java/org/aspectj/apache/bcel/classfile/LineNumberTable.java
+++ b/bcel-builder/src/main/java/org/aspectj/apache/bcel/classfile/LineNumberTable.java
@@ -64,7 +64,7 @@ import org.aspectj.apache.bcel.Constants;
 /**
  * This class represents a table of line numbers for debugging purposes. This attribute is used by the <em>Code</em> attribute. It
  * contains pairs of PCs and line numbers.
- * 
+ *
  * @version $Id: LineNumberTable.java,v 1.8 2009/09/15 19:40:12 aclement Exp $
  * @author <A HREF="mailto:markus.dahm@berlin.de">M. Dahm</A>
  * @see Code changes: asc Feb06 Made unpacking lazy
@@ -94,7 +94,7 @@ public final class LineNumberTable extends Attribute {
 
 	/**
 	 * Construct object from file stream.
-	 * 
+	 *
 	 * @param name_index Index of name
 	 * @param length Content length in bytes
 	 * @param file Input stream
@@ -132,7 +132,7 @@ public final class LineNumberTable extends Attribute {
 	/**
 	 * Called by objects that are traversing the nodes of the tree implicitely defined by the contents of a Java class. I.e., the
 	 * hierarchy of methods, fields, attributes, etc. spawns a tree of objects.
-	 * 
+	 *
 	 * @param v Visitor object
 	 */
 	@Override
@@ -143,7 +143,7 @@ public final class LineNumberTable extends Attribute {
 
 	/**
 	 * Dump line number table attribute to file stream in binary format.
-	 * 
+	 *
 	 * @param file Output file stream
 	 * @throws IOException
 	 */
@@ -184,8 +184,8 @@ public final class LineNumberTable extends Attribute {
 	@Override
 	public final String toString() {
 		unpack();
-		StringBuffer buf = new StringBuffer();
-		StringBuffer line = new StringBuffer();
+		StringBuilder buf = new StringBuilder();
+		StringBuilder line = new StringBuilder();
 
 		for (int i = 0; i < tableLength; i++) {
 			line.append(table[i].toString());
@@ -208,7 +208,7 @@ public final class LineNumberTable extends Attribute {
 
 	/**
 	 * Map byte code positions to source code lines.
-	 * 
+	 *
 	 * @param pos byte code offset
 	 * @return corresponding line in source code
 	 */
diff --git a/bcel-builder/src/main/java/org/aspectj/apache/bcel/classfile/LocalVariableTable.java b/bcel-builder/src/main/java/org/aspectj/apache/bcel/classfile/LocalVariableTable.java
index 96c52d20f..b32ca7179 100644
--- a/bcel-builder/src/main/java/org/aspectj/apache/bcel/classfile/LocalVariableTable.java
+++ b/bcel-builder/src/main/java/org/aspectj/apache/bcel/classfile/LocalVariableTable.java
@@ -177,7 +177,7 @@ public class LocalVariableTable extends Attribute {
 	 */
 	@Override
 	public final String toString() {
-		StringBuffer buf = new StringBuffer("");
+		StringBuilder buf = new StringBuilder("");
 		unpack();
 		for (int i = 0; i < localVariableTableLength; i++) {
 			buf.append(localVariableTable[i].toString());
diff --git a/bcel-builder/src/main/java/org/aspectj/apache/bcel/classfile/LocalVariableTypeTable.java b/bcel-builder/src/main/java/org/aspectj/apache/bcel/classfile/LocalVariableTypeTable.java
index 93951faf8..2258652ce 100644
--- a/bcel-builder/src/main/java/org/aspectj/apache/bcel/classfile/LocalVariableTypeTable.java
+++ b/bcel-builder/src/main/java/org/aspectj/apache/bcel/classfile/LocalVariableTypeTable.java
@@ -104,7 +104,7 @@ public class LocalVariableTypeTable extends Attribute {
 	 */
 	@Override
 	public final String toString() {
-		StringBuffer buf = new StringBuffer("");
+		StringBuilder buf = new StringBuilder("");
 
 		for (int i = 0; i < local_variable_type_table_length; i++) {
 			buf.append(local_variable_type_table[i].toString());
diff --git a/bcel-builder/src/main/java/org/aspectj/apache/bcel/classfile/Method.java b/bcel-builder/src/main/java/org/aspectj/apache/bcel/classfile/Method.java
index 12608940a..316eaa4c9 100644
--- a/bcel-builder/src/main/java/org/aspectj/apache/bcel/classfile/Method.java
+++ b/bcel-builder/src/main/java/org/aspectj/apache/bcel/classfile/Method.java
@@ -67,7 +67,7 @@ import org.aspectj.apache.bcel.generic.Type;
 /**
  * This class represents the method info structure, i.e., the representation for a method in the class. See JVM specification for
  * details. A method has access flags, a name, a signature and a number of attributes.
- * 
+ *
  * @version $Id: Method.java,v 1.11 2009/09/15 19:40:12 aclement Exp $
  * @author <A HREF="mailto:markus.dahm@berlin.de">M. Dahm</A>
  */
@@ -151,7 +151,7 @@ public final class Method extends FieldOrMethod {
 	public final String toString() {
 		ConstantUtf8 c;
 		String name, signature, access; // Short cuts to constant pool
-		StringBuffer buf;
+		StringBuilder buf;
 
 		access = Utility.accessToString(modifiers);
 
@@ -163,7 +163,7 @@ public final class Method extends FieldOrMethod {
 		name = c.getValue();
 
 		signature = Utility.methodSignatureToString(signature, name, access, true, getLocalVariableTable());
-		buf = new StringBuffer(signature);
+		buf = new StringBuilder(signature);
 
         for (Attribute a : attributes) {
             if (!((a instanceof Code) || (a instanceof ExceptionTable)))
diff --git a/bcel-builder/src/main/java/org/aspectj/apache/bcel/classfile/ModulePackages.java b/bcel-builder/src/main/java/org/aspectj/apache/bcel/classfile/ModulePackages.java
index 6f96ae0fd..1ce96a8ba 100644
--- a/bcel-builder/src/main/java/org/aspectj/apache/bcel/classfile/ModulePackages.java
+++ b/bcel-builder/src/main/java/org/aspectj/apache/bcel/classfile/ModulePackages.java
@@ -62,7 +62,7 @@ import org.aspectj.apache.bcel.Constants;
 /**
  * Indicates all the packages of a module that are exported or opened by the module attribute.
  * http://cr.openjdk.java.net/~mr/jigsaw/spec/java-se-9-jvms-diffs.pdf 4.7.26
- * 
+ *
  * @author Andy Clement
  */
 public final class ModulePackages extends Attribute {
@@ -116,7 +116,7 @@ public final class ModulePackages extends Attribute {
 
 	@Override
 	public final String toString() {
-		StringBuffer buf = new StringBuffer();
+		StringBuilder buf = new StringBuilder();
 		for (int packageIndex : packageIndices) {
 			buf.append(cpool.getPackageName(packageIndex) + "\n");
 		}
diff --git a/bcel-builder/src/main/java/org/aspectj/apache/bcel/classfile/NestHost.java b/bcel-builder/src/main/java/org/aspectj/apache/bcel/classfile/NestHost.java
index 52d312659..547b71dae 100644
--- a/bcel-builder/src/main/java/org/aspectj/apache/bcel/classfile/NestHost.java
+++ b/bcel-builder/src/main/java/org/aspectj/apache/bcel/classfile/NestHost.java
@@ -62,7 +62,7 @@ import org.aspectj.apache.bcel.Constants;
 
 /**
  * https://docs.oracle.com/javase/specs/jvms/se11/html/jvms-4.html#jvms-4.7.28
- * 
+ *
  * @see Attribute
  */
 public final class NestHost extends Attribute {
@@ -100,7 +100,7 @@ public final class NestHost extends Attribute {
 	public final void setHostClassIndex(int hostClassIndex) {
 		this.hostClassIndex = hostClassIndex;
 	}
-	
+
 	public final String getHostClassName() {
 		ConstantClass constantClass = (ConstantClass)cpool.getConstant(hostClassIndex,Constants.CONSTANT_Class);
 		return constantClass.getClassname(cpool);
@@ -108,7 +108,7 @@ public final class NestHost extends Attribute {
 
 	@Override
 	public final String toString() {
-		StringBuffer buf = new StringBuffer();
+		StringBuilder buf = new StringBuilder();
 		buf.append("NestHost(");
 		ConstantClass constantClass = (ConstantClass)cpool.getConstant(hostClassIndex,Constants.CONSTANT_Class);
 		buf.append(constantClass.getClassname(cpool));
diff --git a/bcel-builder/src/main/java/org/aspectj/apache/bcel/classfile/NestMembers.java b/bcel-builder/src/main/java/org/aspectj/apache/bcel/classfile/NestMembers.java
index 9d273966f..8179aaf18 100644
--- a/bcel-builder/src/main/java/org/aspectj/apache/bcel/classfile/NestMembers.java
+++ b/bcel-builder/src/main/java/org/aspectj/apache/bcel/classfile/NestMembers.java
@@ -62,7 +62,7 @@ import org.aspectj.apache.bcel.Constants;
 
 /**
  * https://docs.oracle.com/javase/specs/jvms/se11/html/jvms-4.html#jvms-4.7.29
- * 
+ *
  * @see Attribute
  */
 public final class NestMembers extends Attribute {
@@ -109,7 +109,7 @@ public final class NestMembers extends Attribute {
 		this.classes = inner_classes;
 		numberOfClasses = (inner_classes == null) ? 0 : inner_classes.length;
 	}
-	
+
 	public final String[] getClassesNames() {
 		String[] result = new String[numberOfClasses];
 		for (int i = 0; i < numberOfClasses; i++) {
@@ -121,7 +121,7 @@ public final class NestMembers extends Attribute {
 
 	@Override
 	public final String toString() {
-		StringBuffer buf = new StringBuffer();
+		StringBuilder buf = new StringBuilder();
 		for (int i = 0; i < numberOfClasses; i++) {
 			ConstantClass constantClass = (ConstantClass)cpool.getConstant(classes[i],Constants.CONSTANT_Class);
 			buf.append(constantClass.getClassname(cpool)).append(" ");
diff --git a/bcel-builder/src/main/java/org/aspectj/apache/bcel/classfile/Signature.java b/bcel-builder/src/main/java/org/aspectj/apache/bcel/classfile/Signature.java
index b7488e9a4..96236c8f3 100644
--- a/bcel-builder/src/main/java/org/aspectj/apache/bcel/classfile/Signature.java
+++ b/bcel-builder/src/main/java/org/aspectj/apache/bcel/classfile/Signature.java
@@ -52,7 +52,7 @@ package org.aspectj.apache.bcel.classfile;
  * individuals on behalf of the Apache Software Foundation.  For more
  * information on the Apache Software Foundation, please see
  * <http://www.apache.org/>.
- * 
+ *
  * Extended by Adrian Colyer, June 2005 to support unpacking of Signature
  * attribute
  */
@@ -67,7 +67,7 @@ import org.aspectj.apache.bcel.Constants;
 /**
  * This class is derived from <em>Attribute</em> and represents a reference to a <href="http://wwwipd.ira.uka.de/~pizza/gj/">GJ</a>
  * attribute.
- * 
+ *
  * @version $Id: Signature.java,v 1.11 2009/09/15 19:40:12 aclement Exp $
  * @author <A HREF="mailto:markus.dahm@berlin.de">M. Dahm</A>
  * @see Attribute
@@ -85,7 +85,7 @@ public final class Signature extends Attribute {
 
 	/**
 	 * Construct object from file stream.
-	 * 
+	 *
 	 * @param name_index Index in constant pool to CONSTANT_Utf8
 	 * @param length Content length in bytes
 	 * @param file Input stream
@@ -110,7 +110,7 @@ public final class Signature extends Attribute {
 	/**
 	 * Called by objects that are traversing the nodes of the tree implicitely defined by the contents of a Java class. I.e., the
 	 * hierarchy of methods, fields, attributes, etc. spawns a tree of objects.
-	 * 
+	 *
 	 * @param v Visitor object
 	 */
 	@Override
@@ -121,7 +121,7 @@ public final class Signature extends Attribute {
 
 	/**
 	 * Dump source file attribute to file stream in binary format.
-	 * 
+	 *
 	 * @param file Output file stream
 	 * @throws IOException
 	 */
@@ -192,7 +192,7 @@ public final class Signature extends Attribute {
 		// System.out.println("return from ident:" + (char)ch);
 
 		if (!identStart(ch)) {
-			StringBuffer buf2 = new StringBuffer();
+			StringBuilder buf2 = new StringBuilder();
 
 			int count = 1;
 			while (Character.isJavaIdentifierPart((char) ch)) {
@@ -216,7 +216,7 @@ public final class Signature extends Attribute {
 			return;
 		}
 
-		StringBuffer buf2 = new StringBuffer();
+		StringBuilder buf2 = new StringBuilder();
 		ch = in.read();
 
 		do {
diff --git a/bcel-builder/src/main/java/org/aspectj/apache/bcel/classfile/StackMap.java b/bcel-builder/src/main/java/org/aspectj/apache/bcel/classfile/StackMap.java
index 29f9c1535..263cda9af 100644
--- a/bcel-builder/src/main/java/org/aspectj/apache/bcel/classfile/StackMap.java
+++ b/bcel-builder/src/main/java/org/aspectj/apache/bcel/classfile/StackMap.java
@@ -64,7 +64,7 @@ import org.aspectj.apache.bcel.Constants;
  * This class represents a stack map attribute used for preverification of Java classes for the <a href="http://java.sun.com/j2me/">
  * Java 2 Micro Edition</a> (J2ME). This attribute is used by the <a href="http://java.sun.com/products/cldc/">KVM</a> and contained
  * within the Code attribute of a method. See CLDC specification 5.3.1.2
- * 
+ *
  * @version $Id: StackMap.java,v 1.6 2009/09/15 19:40:12 aclement Exp $
  * @author <A HREF="mailto:markus.dahm@berlin.de">M. Dahm</A>
  * @see Code
@@ -77,11 +77,11 @@ public final class StackMap extends Attribute {
 
 	/*
 	 * @param name_index Index of name
-	 * 
+	 *
 	 * @param length Content length in bytes
-	 * 
+	 *
 	 * @param map Table of stack map entries
-	 * 
+	 *
 	 * @param constant_pool Array of constants
 	 */
 	public StackMap(int name_index, int length, StackMapEntry[] map, ConstantPool constant_pool) {
@@ -92,7 +92,7 @@ public final class StackMap extends Attribute {
 
 	/**
 	 * Construct object from file stream.
-	 * 
+	 *
 	 * @param name_index Index of name
 	 * @param length Content length in bytes
 	 * @param file Input stream
@@ -111,7 +111,7 @@ public final class StackMap extends Attribute {
 
 	/**
 	 * Dump line number table attribute to file stream in binary format.
-	 * 
+	 *
 	 * @param file Output file stream
 	 * @throws IOException
 	 */
@@ -144,7 +144,7 @@ public final class StackMap extends Attribute {
 	 */
 	@Override
 	public final String toString() {
-		StringBuffer buf = new StringBuffer("StackMap(");
+		StringBuilder buf = new StringBuilder("StackMap(");
 
 		for (int i = 0; i < map_length; i++) {
 			buf.append(map[i].toString());
@@ -176,7 +176,7 @@ public final class StackMap extends Attribute {
 	/**
 	 * Called by objects that are traversing the nodes of the tree implicitely defined by the contents of a Java class. I.e., the
 	 * hierarchy of methods, fields, attributes, etc. spawns a tree of objects.
-	 * 
+	 *
 	 * @param v Visitor object
 	 */
 	@Override
diff --git a/bcel-builder/src/main/java/org/aspectj/apache/bcel/classfile/StackMapEntry.java b/bcel-builder/src/main/java/org/aspectj/apache/bcel/classfile/StackMapEntry.java
index 76bb2ab79..1ed14cd01 100644
--- a/bcel-builder/src/main/java/org/aspectj/apache/bcel/classfile/StackMapEntry.java
+++ b/bcel-builder/src/main/java/org/aspectj/apache/bcel/classfile/StackMapEntry.java
@@ -113,7 +113,7 @@ public final class StackMapEntry implements Cloneable {
    *
    * @param file Output file stream
    * @throws IOException
-   */ 
+   */
   public final void dump(DataOutputStream file) throws IOException
   {
     file.writeShort(byte_code_offset);
@@ -129,9 +129,9 @@ public final class StackMapEntry implements Cloneable {
 
   /**
    * @return String representation.
-   */ 
+   */
   public final String toString() {
-    StringBuffer buf = new StringBuffer("(offset=" + byte_code_offset);
+    StringBuilder buf = new StringBuilder("(offset=" + byte_code_offset);
 
     if(number_of_locals > 0) {
       buf.append(", locals={");
@@ -159,7 +159,7 @@ public final class StackMapEntry implements Cloneable {
 
     buf.append(")");
 
-    return buf.toString();    
+    return buf.toString();
   }
 
 
@@ -198,12 +198,12 @@ public final class StackMapEntry implements Cloneable {
 
   /**
    * @return Constant pool used by this object.
-   */   
+   */
   public final ConstantPool getConstantPool() { return constant_pool; }
 
   /**
    * @param constant_pool Constant pool to be used for this object.
-   */   
+   */
   public final void setConstantPool(ConstantPool constant_pool) {
     this.constant_pool = constant_pool;
   }
diff --git a/bcel-builder/src/main/java/org/aspectj/apache/bcel/classfile/Synthetic.java b/bcel-builder/src/main/java/org/aspectj/apache/bcel/classfile/Synthetic.java
index 57fe97468..3c63f1131 100644
--- a/bcel-builder/src/main/java/org/aspectj/apache/bcel/classfile/Synthetic.java
+++ b/bcel-builder/src/main/java/org/aspectj/apache/bcel/classfile/Synthetic.java
@@ -65,7 +65,7 @@ import org.aspectj.apache.bcel.Constants;
  * specification states "A class member that does not appear in the source code must be marked using a Synthetic attribute." It may
  * appear in the ClassFile attribute table, a field_info table or a method_info table. This class is intended to be instantiated
  * from the <em>Attribute.readAttribute()</em> method.
- * 
+ *
  * @version $Id: Synthetic.java,v 1.5 2009/09/15 19:40:12 aclement Exp $
  * @author <A HREF="mailto:markus.dahm@berlin.de">M. Dahm</A>
  * @see Attribute
@@ -81,7 +81,7 @@ public final class Synthetic extends Attribute {
 		this(c.getNameIndex(), c.getLength(), c.getBytes(), c.getConstantPool());
 	}
 
-	//  
+	//
 	// public Synthetic(ConstantPoolGen cpool) {
 	// super(Constants.ATTR_SYNTHETIC, cpool.addUtf8("Synthetic"), 0, cpool);
 	// ConstantPoolGen cpg = myGen.getConstantPool();
@@ -102,7 +102,7 @@ public final class Synthetic extends Attribute {
 
 	/**
 	 * Construct object from file stream.
-	 * 
+	 *
 	 * @param name_index Index in constant pool to CONSTANT_Utf8
 	 * @param length Content length in bytes
 	 * @param file Input stream
@@ -122,7 +122,7 @@ public final class Synthetic extends Attribute {
 	/**
 	 * Called by objects that are traversing the nodes of the tree implicitely defined by the contents of a Java class. I.e., the
 	 * hierarchy of methods, fields, attributes, etc. spawns a tree of objects.
-	 * 
+	 *
 	 * @param v Visitor object
 	 */
 	@Override
@@ -132,7 +132,7 @@ public final class Synthetic extends Attribute {
 
 	/**
 	 * Dump source file attribute to file stream in binary format.
-	 * 
+	 *
 	 * @param file Output file stream
 	 * @throws IOException
 	 */
@@ -162,7 +162,7 @@ public final class Synthetic extends Attribute {
 	 */
 	@Override
 	public final String toString() {
-		StringBuffer buf = new StringBuffer("Synthetic");
+		StringBuilder buf = new StringBuilder("Synthetic");
 
 		if (length > 0)
 			buf.append(" " + Utility.toHexString(bytes));
diff --git a/bcel-builder/src/main/java/org/aspectj/apache/bcel/classfile/Utility.java b/bcel-builder/src/main/java/org/aspectj/apache/bcel/classfile/Utility.java
index 71573a311..921570515 100644
--- a/bcel-builder/src/main/java/org/aspectj/apache/bcel/classfile/Utility.java
+++ b/bcel-builder/src/main/java/org/aspectj/apache/bcel/classfile/Utility.java
@@ -74,10 +74,10 @@ import org.aspectj.apache.bcel.util.ByteSequence;
 
 /**
  * Utility functions that do not really belong to any class in particular.
- * 
+ *
  * @version $Id: Utility.java,v 1.14 2009/09/28 16:39:46 aclement Exp $
  * @author <A HREF="mailto:markus.dahm@berlin.de">M. Dahm</A>
- * 
+ *
  *         modified: Andy Clement 2-mar-05 Removed unnecessary static and optimized
  */
 public abstract class Utility {
@@ -91,7 +91,7 @@ public abstract class Utility {
 
 	/**
 	 * Convert bit field of flags into string such as 'static final'.
-	 * 
+	 *
 	 * @param access_flags Access flags
 	 * @return String representation of flags
 	 */
@@ -101,16 +101,16 @@ public abstract class Utility {
 
 	/**
 	 * Convert bit field of flags into string such as 'static final'.
-	 * 
+	 *
 	 * Special case: Classes compiled with new compilers and with the 'ACC_SUPER' flag would be said to be "synchronized". This is
 	 * because SUN used the same value for the flags 'ACC_SUPER' and 'ACC_SYNCHRONIZED'.
-	 * 
+	 *
 	 * @param access_flags Access flags
 	 * @param for_class access flags are for class qualifiers ?
 	 * @return String representation of flags
 	 */
 	public static final String accessToString(int access_flags, boolean for_class) {
-		StringBuffer buf = new StringBuffer();
+		StringBuilder buf = new StringBuilder();
 
 		int p = 0;
 		for (int i = 0; p < Constants.MAX_ACC_FLAG; i++) { // Loop through known flags
@@ -136,7 +136,7 @@ public abstract class Utility {
 	/**
 	 * Disassemble a byte array of JVM byte codes starting from code line 'index' and return the disassembled string representation.
 	 * Decode only 'num' opcodes (including their operands), use -1 if you want to decompile everything.
-	 * 
+	 *
 	 * @param code byte code array
 	 * @param constant_pool Array of constants
 	 * @param index offset in `code' array <EM>(number of opcodes, not bytes!)</EM>
@@ -145,7 +145,7 @@ public abstract class Utility {
 	 * @return String representation of byte codes
 	 */
 	public static final String codeToString(byte[] code, ConstantPool constant_pool, int index, int length, boolean verbose) {
-		StringBuffer buf = new StringBuffer(code.length * 20); // Should be sufficient
+		StringBuilder buf = new StringBuilder(code.length * 20); // Should be sufficient
 		ByteSequence stream = new ByteSequence(code);
 
 		try {
@@ -182,7 +182,7 @@ public abstract class Utility {
 
 	/**
 	 * Shorten long class names, <em>java/lang/String</em> becomes <em>String</em>.
-	 * 
+	 *
 	 * @param str The long class name
 	 * @return Compacted class name
 	 */
@@ -193,7 +193,7 @@ public abstract class Utility {
 	/**
 	 * Shorten long class name <em>str</em>, i.e., chop off the <em>prefix</em>, if the class name starts with this string and the
 	 * flag <em>chopit</em> is true. Slashes <em>/</em> are converted to dots <em>.</em>.
-	 * 
+	 *
 	 * @param str The long class name
 	 * @param prefix The prefix the get rid off
 	 * @param chopit Flag that determines whether chopping is executed or not
@@ -217,7 +217,7 @@ public abstract class Utility {
 	/**
 	 * Shorten long class names, <em>java/lang/String</em> becomes <em>java.lang.String</em>, e.g.. If <em>chopit</em> is
 	 * <em>true</em> the prefix <em>java.lang</em> is also removed.
-	 * 
+	 *
 	 * @param str The long class name
 	 * @param chopit Flag that determines whether chopping is executed or not
 	 * @return Compacted class name
@@ -240,7 +240,7 @@ public abstract class Utility {
 	 */
 	public static final String methodSignatureToString(String signature, String name, String access, boolean chopit,
 			LocalVariableTable vars) throws ClassFormatException {
-		StringBuffer buf = new StringBuffer("(");
+		StringBuilder buf = new StringBuilder("(");
 		String type;
 		int index;
 		int var_index = (access.contains("static")) ? 0 : 1;
@@ -298,7 +298,7 @@ public abstract class Utility {
 
 	/**
 	 * Replace all occurences of <em>old</em> in <em>str</em> with <em>new</em>.
-	 * 
+	 *
 	 * @param str String to permute
 	 * @param old String to be replaced
 	 * @param new Replacement string
@@ -306,7 +306,7 @@ public abstract class Utility {
 	 */
 	public static final String replace(String str, String old, String new_) {
 		int index, old_index;
-		StringBuffer buf = new StringBuffer();
+		StringBuilder buf = new StringBuilder();
 
 		try {
 			index = str.indexOf(old);
@@ -332,7 +332,7 @@ public abstract class Utility {
 
 	/**
 	 * Converts signature to string with all class names compacted.
-	 * 
+	 *
 	 * @param signature to convert
 	 * @return Human readable signature
 	 */
@@ -381,7 +381,7 @@ public abstract class Utility {
 					int genericEnd = signature.indexOf('>');
 					// FIXME asc going to need a lot more work in here for generics
 					ResultHolder rh = signatureToStringInternal(signature.substring(genericStart + 1, genericEnd), chopit);
-					StringBuffer sb = new StringBuffer();
+					StringBuilder sb = new StringBuilder();
 					sb.append(signature.substring(1, genericStart));
 					sb.append("<").append(rh.getResult()).append(">");
 					ResultHolder retval = new ResultHolder(compactClassName(sb.toString(), chopit), genericEnd + 1);
@@ -399,10 +399,10 @@ public abstract class Utility {
 				return ResultHolder.BOOLEAN;
 
 			case '[': { // Array declaration
-				StringBuffer brackets;
+				StringBuilder brackets;
 				int consumedChars, n;
 
-				brackets = new StringBuffer(); // Accumulate []'s
+				brackets = new StringBuilder(); // Accumulate []'s
 				// Count opening brackets and look for optional size argument
 				for (n = 0; signature.charAt(n) == '['; n++) {
 					brackets.append("[]");
@@ -426,7 +426,7 @@ public abstract class Utility {
 
 	/**
 	 * Return type of method signature as a byte value as defined in <em>Constants</em>
-	 * 
+	 *
 	 * @param signature in format described above
 	 * @return type of method signature
 	 * @see Constants
@@ -453,11 +453,11 @@ public abstract class Utility {
 
 	/**
 	 * Convert bytes into hexidecimal string
-	 * 
+	 *
 	 * @return bytes as hexidecimal string, e.g. 00 FA 12 ...
 	 */
 	public static final String toHexString(byte[] bytes) {
-		StringBuffer buf = new StringBuffer();
+		StringBuilder buf = new StringBuilder();
 
 		for (int i = 0; i < bytes.length; i++) {
 			short b = byteToShort(bytes[i]);
@@ -480,7 +480,7 @@ public abstract class Utility {
 
 	/**
 	 * Return a string for an integer justified left or right and filled up with 'fill' characters if necessary.
-	 * 
+	 *
 	 * @param i integer to format
 	 * @param length length of desired string
 	 * @param left_justify format left or right
@@ -493,7 +493,7 @@ public abstract class Utility {
 
 	/**
 	 * Fillup char with up to length characters with char `fill' and justify it left or right.
-	 * 
+	 *
 	 * @param str string to format
 	 * @param length length of desired string
 	 * @param left_justify format left or right
@@ -520,7 +520,7 @@ public abstract class Utility {
 	 */
 	public static final String convertString(String label) {
 		char[] ch = label.toCharArray();
-		StringBuffer buf = new StringBuffer();
+		StringBuilder buf = new StringBuilder();
 
 		for (char c : ch) {
 			switch (c) {
@@ -550,7 +550,7 @@ public abstract class Utility {
 
 	/**
 	 * Converts a list of AnnotationGen objects into a set of attributes that can be attached to the class file.
-	 * 
+	 *
 	 * @param cp The constant pool gen where we can create the necessary name refs
 	 * @param annotations A list of AnnotationGen objects
 	 */
@@ -747,7 +747,7 @@ public abstract class Utility {
 
 	/**
 	 * Return type of signature as a byte value as defined in <em>Constants</em>
-	 * 
+	 *
 	 * @param signature in format described above
 	 * @return type of signature
 	 * @see Constants
@@ -816,7 +816,7 @@ public abstract class Utility {
 
 	/**
 	 * Disassemble a stream of byte codes and return the string representation.
-	 * 
+	 *
 	 * @param bytes stream of bytes
 	 * @param constant_pool Array of constants
 	 * @param verbose be verbose, e.g. print constant pool index
@@ -828,7 +828,7 @@ public abstract class Utility {
 		int index, vindex, constant;
 		int[] match, jump_table;
 		int no_pad_bytes = 0, offset;
-		StringBuffer buf = new StringBuffer(Constants.OPCODE_NAMES[opcode]);
+		StringBuilder buf = new StringBuilder(Constants.OPCODE_NAMES[opcode]);
 
 		/*
 		 * Special case: Skip (0-3) padding bytes, i.e., the following bytes are 4-byte-aligned
@@ -995,13 +995,13 @@ public abstract class Utility {
 					+ bytes.readUnsignedByte()); // Last byte is a reserved
 			// space
 			break;
-			
+
 		case Constants.INVOKEDYNAMIC://http://docs.oracle.com/javase/specs/jvms/se7/html/jvms-6.html#jvms-6.5.invokedynamic
 			index = bytes.readUnsignedShort();
 			bytes.readUnsignedShort(); // zeroes
 			buf.append("\t" + constant_pool.constantToString(index) + (verbose ? " (" + index + ")" : ""));
 			break;
-			
+
 		// Operands are references to items in constant pool
 		case Constants.LDC_W:
 		case Constants.LDC2_W:
@@ -1076,13 +1076,13 @@ public abstract class Utility {
 
 	/**
 	 * Convert type to Java method signature, e.g. int[] f(java.lang.String x) becomes (Ljava/lang/String;)[I
-	 * 
+	 *
 	 * @param returnType what the method returns
 	 * @param argTypes what are the argument types
 	 * @return method signature for given type(s).
 	 */
 	public static String toMethodSignature(Type returnType, Type[] argTypes) {
-		StringBuffer buf = new StringBuffer("(");
+		StringBuilder buf = new StringBuilder("(");
 		int length = (argTypes == null) ? 0 : argTypes.length;
 		for (int i = 0; i < length; i++) {
 			buf.append(argTypes[i].getSignature());
diff --git a/bcel-builder/src/main/java/org/aspectj/apache/bcel/classfile/annotation/AnnotationElementValue.java b/bcel-builder/src/main/java/org/aspectj/apache/bcel/classfile/annotation/AnnotationElementValue.java
index d5995b274..3fb6de6d7 100644
--- a/bcel-builder/src/main/java/org/aspectj/apache/bcel/classfile/annotation/AnnotationElementValue.java
+++ b/bcel-builder/src/main/java/org/aspectj/apache/bcel/classfile/annotation/AnnotationElementValue.java
@@ -48,7 +48,7 @@ public class AnnotationElementValue extends ElementValue {
 
 	@Override
 	public String stringifyValue() {
-		StringBuffer sb = new StringBuffer();
+		StringBuilder sb = new StringBuilder();
 		ConstantUtf8 cu8 = (ConstantUtf8) cpool.getConstant(a.getTypeIndex(), Constants.CONSTANT_Utf8);
 		sb.append(cu8.getValue());
 		// haven't really tested this values section:
diff --git a/bcel-builder/src/main/java/org/aspectj/apache/bcel/classfile/annotation/AnnotationGen.java b/bcel-builder/src/main/java/org/aspectj/apache/bcel/classfile/annotation/AnnotationGen.java
index 93c875d4c..b05a02705 100644
--- a/bcel-builder/src/main/java/org/aspectj/apache/bcel/classfile/annotation/AnnotationGen.java
+++ b/bcel-builder/src/main/java/org/aspectj/apache/bcel/classfile/annotation/AnnotationGen.java
@@ -113,7 +113,7 @@ public class AnnotationGen {
 
 	@Override
 	public String toString() {
-		StringBuffer s = new StringBuffer();
+		StringBuilder s = new StringBuilder();
 		s.append("AnnotationGen:[" + getTypeName() + " #" + pairs.size() + " {");
 		for (int i = 0; i < pairs.size(); i++) {
 			s.append(pairs.get(i));
@@ -125,7 +125,7 @@ public class AnnotationGen {
 	}
 
 	public String toShortString() {
-		StringBuffer s = new StringBuffer();
+		StringBuilder s = new StringBuilder();
 		s.append("@").append(getTypeName());
 		if (pairs.size()!=0) {
 			s.append("(");
diff --git a/bcel-builder/src/main/java/org/aspectj/apache/bcel/classfile/annotation/ArrayElementValue.java b/bcel-builder/src/main/java/org/aspectj/apache/bcel/classfile/annotation/ArrayElementValue.java
index 3481f64a8..68b7db7c8 100644
--- a/bcel-builder/src/main/java/org/aspectj/apache/bcel/classfile/annotation/ArrayElementValue.java
+++ b/bcel-builder/src/main/java/org/aspectj/apache/bcel/classfile/annotation/ArrayElementValue.java
@@ -62,7 +62,7 @@ public class ArrayElementValue extends ElementValue {
 
 	@Override
 	public String stringifyValue() {
-		StringBuffer sb = new StringBuffer();
+		StringBuilder sb = new StringBuilder();
 		sb.append("[");
 		for (int i = 0; i < evalues.length; i++) {
 			ElementValue element = evalues[i];
diff --git a/bcel-builder/src/main/java/org/aspectj/apache/bcel/classfile/annotation/EnumElementValue.java b/bcel-builder/src/main/java/org/aspectj/apache/bcel/classfile/annotation/EnumElementValue.java
index 6d16ff732..29e4d8710 100644
--- a/bcel-builder/src/main/java/org/aspectj/apache/bcel/classfile/annotation/EnumElementValue.java
+++ b/bcel-builder/src/main/java/org/aspectj/apache/bcel/classfile/annotation/EnumElementValue.java
@@ -76,7 +76,7 @@ public class EnumElementValue extends ElementValue {
 	 */
 	@Override
 	public String stringifyValue() {
-		StringBuffer sb = new StringBuffer();
+		StringBuilder sb = new StringBuilder();
 		ConstantUtf8 cu8 = (ConstantUtf8) cpool.getConstant(typeIdx, Constants.CONSTANT_Utf8);
 		sb.append(cu8.getValue());
 		cu8 = (ConstantUtf8) cpool.getConstant(valueIdx, Constants.CONSTANT_Utf8);
diff --git a/bcel-builder/src/main/java/org/aspectj/apache/bcel/classfile/annotation/NameValuePair.java b/bcel-builder/src/main/java/org/aspectj/apache/bcel/classfile/annotation/NameValuePair.java
index 0140b34cb..8da630400 100644
--- a/bcel-builder/src/main/java/org/aspectj/apache/bcel/classfile/annotation/NameValuePair.java
+++ b/bcel-builder/src/main/java/org/aspectj/apache/bcel/classfile/annotation/NameValuePair.java
@@ -68,7 +68,7 @@ public class NameValuePair {
 
 	@Override
 	public String toString() {
-		StringBuffer sb = new StringBuffer();
+		StringBuilder sb = new StringBuilder();
 		sb.append(getNameString()).append("=").append(value.stringifyValue());
 		return sb.toString();
 	}
diff --git a/bcel-builder/src/main/java/org/aspectj/apache/bcel/generic/ArrayType.java b/bcel-builder/src/main/java/org/aspectj/apache/bcel/generic/ArrayType.java
index d9599289b..63f6db57b 100644
--- a/bcel-builder/src/main/java/org/aspectj/apache/bcel/generic/ArrayType.java
+++ b/bcel-builder/src/main/java/org/aspectj/apache/bcel/generic/ArrayType.java
@@ -55,7 +55,7 @@ package org.aspectj.apache.bcel.generic;
  */
 import org.aspectj.apache.bcel.Constants;
 
-/** 
+/**
  * Denotes array type, such as int[][]
  *
  * @version $Id: ArrayType.java,v 1.4 2008/08/26 15:02:04 aclement Exp $
@@ -69,7 +69,7 @@ public final class ArrayType extends ReferenceType {
    * Convenience constructor for array type, e.g. int[]
    *
    * @param type array type, e.g. T_INT
-   */ 
+   */
   public ArrayType(byte type, int dimensions) {
     this(BasicType.getType(type), dimensions);
   }
@@ -78,7 +78,7 @@ public final class ArrayType extends ReferenceType {
    * Convenience constructor for reference array type, e.g. Object[]
    *
    * @param class_name complete name of class (java.lang.String, e.g.)
-   */ 
+   */
   public ArrayType(String class_name, int dimensions) {
     this(new ObjectType(class_name), dimensions);
   }
@@ -87,7 +87,7 @@ public final class ArrayType extends ReferenceType {
    * Constructor for array of given type
    *
    * @param type type of array (may be an array itself)
-   */ 
+   */
   public ArrayType(Type type, int dimensions) {
     super(Constants.T_ARRAY, "<dummy>");
 
@@ -100,7 +100,7 @@ public final class ArrayType extends ReferenceType {
       this.dimensions = dimensions + array.dimensions;
       basic_type      = array.basic_type;
       break;
-      
+
     case Constants.T_VOID:
       throw new ClassGenException("Invalid type: void[]");
 
@@ -110,7 +110,7 @@ public final class ArrayType extends ReferenceType {
       break;
     }
 
-    StringBuffer buf = new StringBuffer();
+    StringBuilder buf = new StringBuilder();
     for(int i=0; i < this.dimensions; i++)
       buf.append('[');
 
diff --git a/bcel-builder/src/main/java/org/aspectj/apache/bcel/generic/FieldGen.java b/bcel-builder/src/main/java/org/aspectj/apache/bcel/generic/FieldGen.java
index 454b74203..78ba1f465 100644
--- a/bcel-builder/src/main/java/org/aspectj/apache/bcel/generic/FieldGen.java
+++ b/bcel-builder/src/main/java/org/aspectj/apache/bcel/generic/FieldGen.java
@@ -75,7 +75,7 @@ import org.aspectj.apache.bcel.classfile.annotation.RuntimeAnnos;
 /**
  * Template class for building up a field. The only extraordinary thing one can do is to add a constant value attribute to a field
  * (which must of course be compatible with the declared type).
- * 
+ *
  * @version $Id: FieldGen.java,v 1.11 2011/10/03 22:41:24 aclement Exp $
  * @author <A HREF="mailto:markus.dahm@berlin.de">M. Dahm</A>
  * @see Field
@@ -86,7 +86,7 @@ public class FieldGen extends FieldGenOrMethodGen {
 	/**
 	 * Declare a field. If it is static (isStatic() == true) and has a basic type like int or String it may have an initial value
 	 * associated with it as defined by setInitValue().
-	 * 
+	 *
 	 * @param modifiers access qualifiers
 	 * @param type field type
 	 * @param name field name
@@ -101,7 +101,7 @@ public class FieldGen extends FieldGenOrMethodGen {
 
 	/**
 	 * Instantiate from existing field.
-	 * 
+	 *
 	 * @param field Field object
 	 * @param cp constant pool (must contain the same entries as the field's constant pool)
 	 */
@@ -230,7 +230,7 @@ public class FieldGen extends FieldGenOrMethodGen {
 		String signature = type.toString();
 		String name = getName();
 
-		StringBuffer buf = new StringBuffer(access).append(signature).append(" ").append(name);
+		StringBuilder buf = new StringBuilder(access).append(signature).append(" ").append(name);
 		String value = getInitialValue();
 
 		if (value != null) {
diff --git a/bcel-builder/src/main/java/org/aspectj/apache/bcel/generic/Instruction.java b/bcel-builder/src/main/java/org/aspectj/apache/bcel/generic/Instruction.java
index 3fa40ac0f..3754e47b9 100644
--- a/bcel-builder/src/main/java/org/aspectj/apache/bcel/generic/Instruction.java
+++ b/bcel-builder/src/main/java/org/aspectj/apache/bcel/generic/Instruction.java
@@ -64,7 +64,7 @@ import org.aspectj.apache.bcel.util.ByteSequence;
 
 /**
  * Abstract super class for all Java byte codes.
- * 
+ *
  * @version $Id: Instruction.java,v 1.10 2011/04/05 15:15:33 aclement Exp $
  * @author <A HREF="mailto:markus.dahm@berlin.de">M. Dahm</A>
  */
@@ -86,7 +86,7 @@ public class Instruction implements Cloneable, Serializable, Constants {
 	/**
 	 * Use with caution, since 'BranchInstruction's have a 'target' reference which is not copied correctly (only basic types are).
 	 * This also applies for 'Select' instructions with their multiple branch targets.
-	 * 
+	 *
 	 * @return (shallow) copy of an instruction
 	 */
 	// GET RID OF THIS - make it throw an exception and track the callers
@@ -107,7 +107,7 @@ public class Instruction implements Cloneable, Serializable, Constants {
 
 	/**
 	 * Read an instruction bytecode from an input stream and return the appropriate object.
-	 * 
+	 *
 	 * @param file file to read from
 	 * @return instruction object being read
 	 */
@@ -439,7 +439,7 @@ public class Instruction implements Cloneable, Serializable, Constants {
 	 */
 	public String toString(boolean verbose) {
 		if (verbose) {
-			StringBuffer sb = new StringBuffer();
+			StringBuilder sb = new StringBuilder();
 			sb.append(getName()).append("[").append(opcode).append("](size").append(Constants.iLen[opcode]).append(")");
 			return sb.toString();
 		} else {
diff --git a/bcel-builder/src/main/java/org/aspectj/apache/bcel/generic/InstructionCP.java b/bcel-builder/src/main/java/org/aspectj/apache/bcel/generic/InstructionCP.java
index 09222d6a4..77fadcf26 100644
--- a/bcel-builder/src/main/java/org/aspectj/apache/bcel/generic/InstructionCP.java
+++ b/bcel-builder/src/main/java/org/aspectj/apache/bcel/generic/InstructionCP.java
@@ -70,7 +70,7 @@ import org.aspectj.apache.bcel.classfile.ConstantUtf8;
 
 /**
  * Class for instructions that use an index into the constant pool such as LDC, INVOKEVIRTUAL, etc.
- * 
+ *
  * @version $Id: InstructionCP.java,v 1.6 2009/10/05 17:35:36 aclement Exp $
  * @author <A HREF="mailto:markus.dahm@berlin.de">M. Dahm</A>
  */
@@ -111,10 +111,10 @@ public class InstructionCP extends Instruction {
 
 	/**
 	 * Long output format:
-	 * 
+	 *
 	 * &lt;name of opcode&gt; "["&lt;opcode number&gt;"]" "("&lt;length of instruction&gt;")" "&lt;"&lt; constant pool
 	 * index&gt;"&gt;"
-	 * 
+	 *
 	 * @param verbose long/short format switch
 	 * @return mnemonic for instruction
 	 */
@@ -172,7 +172,7 @@ public class InstructionCP extends Instruction {
 			// ConstantPool cp = cpg.getConstantPool();
 			// String name = cp.getConstantString(index, CONSTANT_Class);
 			if (!name.startsWith("[")) {
-				StringBuffer sb = new StringBuffer();
+				StringBuilder sb = new StringBuilder();
 				sb.append("L").append(name).append(";");
 				return Type.getType(sb.toString());
 			} else {
diff --git a/bcel-builder/src/main/java/org/aspectj/apache/bcel/generic/InstructionList.java b/bcel-builder/src/main/java/org/aspectj/apache/bcel/generic/InstructionList.java
index 690c9f600..cb580de26 100644
--- a/bcel-builder/src/main/java/org/aspectj/apache/bcel/generic/InstructionList.java
+++ b/bcel-builder/src/main/java/org/aspectj/apache/bcel/generic/InstructionList.java
@@ -74,9 +74,9 @@ import org.aspectj.apache.bcel.util.ByteSequence;
  * inserted, moved, deleted, etc.. Instructions are being wrapped into <a href="InstructionHandle.html">InstructionHandles</a>
  * objects that are returned upon append/insert operations. They give the user (read only) access to the list structure, such that
  * it can be traversed and manipulated in a controlled way.
- * 
+ *
  * A list is finally dumped to a byte code array with <a href="#getByteCode()">getByteCode</a>.
- * 
+ *
  * @version $Id: InstructionList.java,v 1.12 2011/09/02 22:33:04 aclement Exp $
  * @author <A HREF="mailto:markus.dahm@berlin.de">M. Dahm</A>
  * @author Abraham Nevado
@@ -106,7 +106,7 @@ public class InstructionList implements Serializable {
 
 	/**
 	 * Find the target instruction (handle) that corresponds to the given target position (byte code offset).
-	 * 
+	 *
 	 * @param ihs array of instruction handles, i.e. il.getInstructionHandles()
 	 * @param pos array of positions corresponding to ihs, i.e. il.getInstructionPositions()
 	 * @param count length of arrays
@@ -143,7 +143,7 @@ public class InstructionList implements Serializable {
 	/**
 	 * Get instruction handle for instruction at byte code position pos. This only works properly, if the list is freshly
 	 * initialized from a byte array or setPositions() has been called before this method.
-	 * 
+	 *
 	 * @param pos byte code position to search for
 	 * @return target position's instruction handle if available
 	 */
@@ -166,7 +166,7 @@ public class InstructionList implements Serializable {
 
 	/**
 	 * Initialize instruction list from byte array.
-	 * 
+	 *
 	 * @param code byte array containing the instructions
 	 */
 	public InstructionList(byte[] code) {
@@ -248,7 +248,7 @@ public class InstructionList implements Serializable {
 
 	/**
 	 * Append another list after instruction (handle) ih contained in this list. Consumes argument list, i.e., it becomes empty.
-	 * 
+	 *
 	 * @param appendTo where to append the instruction list
 	 * @param appendee Instruction list to append to this one
 	 * @return instruction handle pointing to the <B>first</B> appended instruction
@@ -283,7 +283,7 @@ public class InstructionList implements Serializable {
 
 	/**
 	 * Append another list after instruction i contained in this list. Consumes argument list, i.e., it becomes empty.
-	 * 
+	 *
 	 * @param i where to append the instruction list
 	 * @param il Instruction list to append to this one
 	 * @return instruction handle pointing to the <B>first</B> appended instruction
@@ -300,7 +300,7 @@ public class InstructionList implements Serializable {
 
 	/**
 	 * Append another list to this one. Consumes argument list, i.e., it becomes empty.
-	 * 
+	 *
 	 * @param il list to append to end of this list
 	 * @return instruction handle of the <B>first</B> appended instruction
 	 */
@@ -326,7 +326,7 @@ public class InstructionList implements Serializable {
 
 	/**
 	 * Append an instruction to the end of this list.
-	 * 
+	 *
 	 * @param ih instruction to append
 	 */
 	private void append(InstructionHandle ih) {
@@ -345,7 +345,7 @@ public class InstructionList implements Serializable {
 
 	/**
 	 * Append an instruction to the end of this list.
-	 * 
+	 *
 	 * @param i instruction to append
 	 * @return instruction handle of the appended instruction
 	 */
@@ -376,7 +376,7 @@ public class InstructionList implements Serializable {
 
 	/**
 	 * Append a branch instruction to the end of this list.
-	 * 
+	 *
 	 * @param i branch instruction to append
 	 * @return branch instruction handle of the appended instruction
 	 */
@@ -389,7 +389,7 @@ public class InstructionList implements Serializable {
 
 	/**
 	 * Append a single instruction j after another instruction i, which must be in this list of course!
-	 * 
+	 *
 	 * @param i Instruction in list
 	 * @param j Instruction to append after i in list
 	 * @return instruction handle of the first appended instruction
@@ -400,7 +400,7 @@ public class InstructionList implements Serializable {
 
 	/**
 	 * Append an instruction after instruction (handle) ih contained in this list.
-	 * 
+	 *
 	 * @param ih where to append the instruction list
 	 * @param i Instruction to append
 	 * @return instruction handle pointing to the <B>first</B> appended instruction
@@ -411,7 +411,7 @@ public class InstructionList implements Serializable {
 
 	/**
 	 * Append an instruction after instruction (handle) ih contained in this list.
-	 * 
+	 *
 	 * @param ih where to append the instruction list
 	 * @param i Instruction to append
 	 * @return instruction handle pointing to the <B>first</B> appended instruction
@@ -428,7 +428,7 @@ public class InstructionList implements Serializable {
 
 	/**
 	 * Insert another list before Instruction handle ih contained in this list. Consumes argument list, i.e., it becomes empty.
-	 * 
+	 *
 	 * @param i where to append the instruction list
 	 * @param il Instruction list to insert
 	 * @return instruction handle of the first inserted instruction
@@ -464,7 +464,7 @@ public class InstructionList implements Serializable {
 
 	/**
 	 * Insert another list.
-	 * 
+	 *
 	 * @param il list to insert before start of this list
 	 * @return instruction handle of the first inserted instruction
 	 */
@@ -479,7 +479,7 @@ public class InstructionList implements Serializable {
 
 	/**
 	 * Insert an instruction at start of this list.
-	 * 
+	 *
 	 * @param ih instruction to insert
 	 */
 	private void insert(InstructionHandle ih) {
@@ -498,7 +498,7 @@ public class InstructionList implements Serializable {
 
 	/**
 	 * Insert another list before Instruction i contained in this list. Consumes argument list, i.e., it becomes empty.
-	 * 
+	 *
 	 * @param i where to append the instruction list
 	 * @param il Instruction list to insert
 	 * @return instruction handle pointing to the first inserted instruction, i.e., il.getStart()
@@ -515,7 +515,7 @@ public class InstructionList implements Serializable {
 
 	/**
 	 * Insert an instruction at start of this list.
-	 * 
+	 *
 	 * @param i instruction to insert
 	 * @return instruction handle of the inserted instruction
 	 */
@@ -528,7 +528,7 @@ public class InstructionList implements Serializable {
 
 	/**
 	 * Insert a branch instruction at start of this list.
-	 * 
+	 *
 	 * @param i branch instruction to insert
 	 * @return branch instruction handle of the appended instruction
 	 */
@@ -540,7 +540,7 @@ public class InstructionList implements Serializable {
 
 	/**
 	 * Insert a single instruction j before another instruction i, which must be in this list of course!
-	 * 
+	 *
 	 * @param i Instruction in list
 	 * @param j Instruction to insert before i in list
 	 * @return instruction handle of the first inserted instruction
@@ -551,7 +551,7 @@ public class InstructionList implements Serializable {
 
 	/**
 	 * Insert an instruction before instruction (handle) ih contained in this list.
-	 * 
+	 *
 	 * @param ih where to insert to the instruction list
 	 * @param i Instruction to insert
 	 * @return instruction handle of the first inserted instruction
@@ -562,7 +562,7 @@ public class InstructionList implements Serializable {
 
 	/**
 	 * Insert an instruction before instruction (handle) ih contained in this list.
-	 * 
+	 *
 	 * @param ih where to insert to the instruction list
 	 * @param i Instruction to insert
 	 * @return instruction handle of the first inserted instruction
@@ -582,7 +582,7 @@ public class InstructionList implements Serializable {
 	 * be after "start" and target must not be located withing this range. If you want to move something to the start of the list
 	 * use null as value for target.<br>
 	 * Any instruction targeters pointing to handles within the block, keep their targets.
-	 * 
+	 *
 	 * @param start of moved block
 	 * @param end of moved block
 	 * @param target of moved block
@@ -644,7 +644,7 @@ public class InstructionList implements Serializable {
 
 	/**
 	 * Move a single instruction (handle) to a new location.
-	 * 
+	 *
 	 * @param ih moved instruction
 	 * @param target new location of moved instruction
 	 */
@@ -654,10 +654,10 @@ public class InstructionList implements Serializable {
 
 	/**
 	 * Remove from instruction 'prev' to instruction 'next' both contained in this list.
-	 * 
+	 *
 	 * If careAboutLostTargeters is true then this method will throw a TargetLostException when one of the removed instruction
 	 * handles is still being targeted.
-	 * 
+	 *
 	 * @param prev where to start deleting (predecessor, exclusive)
 	 * @param next where to end deleting (successor, exclusive)
 	 */
@@ -697,7 +697,7 @@ public class InstructionList implements Serializable {
 			ih.getInstruction().dispose(); // e.g. BranchInstructions release their targets
 		}
 
-		StringBuffer buf = new StringBuffer("{ ");
+		StringBuilder buf = new StringBuilder("{ ");
 		for (InstructionHandle ih = first; ih != null; ih = next) {
 			next = ih.next;
 			length--;
@@ -757,7 +757,7 @@ public class InstructionList implements Serializable {
 
 	/**
 	 * Remove instruction from this list. The corresponding Instruction handles must not be reused!
-	 * 
+	 *
 	 * @param ih instruction (handle) to remove
 	 */
 	public void delete(InstructionHandle ih) throws TargetLostException {
@@ -766,7 +766,7 @@ public class InstructionList implements Serializable {
 
 	/**
 	 * Remove instruction from this list. The corresponding Instruction handles must not be reused!
-	 * 
+	 *
 	 * @param i instruction to remove
 	 */
 	// public void delete(Instruction i) throws TargetLostException {
@@ -780,7 +780,7 @@ public class InstructionList implements Serializable {
 	/**
 	 * Remove instructions from instruction `from' to instruction `to' contained in this list. The user must ensure that `from' is
 	 * an instruction before `to', or risk havoc. The corresponding Instruction handles must not be reused!
-	 * 
+	 *
 	 * @param from where to start deleting (inclusive)
 	 * @param to where to end deleting (inclusive)
 	 */
@@ -791,7 +791,7 @@ public class InstructionList implements Serializable {
 	/**
 	 * Remove instructions from instruction `from' to instruction `to' contained in this list. The user must ensure that `from' is
 	 * an instruction before `to', or risk havoc. The corresponding Instruction handles must not be reused!
-	 * 
+	 *
 	 * @param from where to start deleting (inclusive)
 	 * @param to where to end deleting (inclusive)
 	 */
@@ -810,7 +810,7 @@ public class InstructionList implements Serializable {
 
 	/**
 	 * Search for given Instruction reference, start at beginning of list.
-	 * 
+	 *
 	 * @param i instruction to search for
 	 * @return instruction found on success, null otherwise
 	 */
@@ -826,7 +826,7 @@ public class InstructionList implements Serializable {
 
 	/**
 	 * Search for given Instruction reference, start at end of list
-	 * 
+	 *
 	 * @param i instruction to search for
 	 * @return instruction found on success, null otherwise
 	 */
@@ -864,7 +864,7 @@ public class InstructionList implements Serializable {
 
 	/**
 	 * Give all instructions their position number (offset in byte stream), i.e., make the list ready to be dumped.
-	 * 
+	 *
 	 * @param check Perform sanity checks, e.g. if all targeted instructions really belong to this list
 	 */
 	public void setPositions(boolean check) {
@@ -972,7 +972,7 @@ public class InstructionList implements Serializable {
 
 	/**
 	 * When everything is finished, use this method to convert the instruction list into an array of bytes.
-	 * 
+	 *
 	 * @return the byte code ready to be dumped
 	 */
 	public byte[] getByteCode() {
@@ -1029,7 +1029,7 @@ public class InstructionList implements Serializable {
 	 * @return String containing all instructions in this list.
 	 */
 	public String toString(boolean verbose) {
-		StringBuffer buf = new StringBuffer();
+		StringBuilder buf = new StringBuilder();
 
 		for (InstructionHandle ih = start; ih != null; ih = ih.next) {
 			buf.append(ih.toString(verbose) + "\n");
@@ -1079,7 +1079,7 @@ public class InstructionList implements Serializable {
 	/**
 	 * Get positions (offsets) of all instructions in the list. This relies on that the list has been freshly created from an byte
 	 * code array, or that setPositions() has been called. Otherwise this may be inaccurate.
-	 * 
+	 *
 	 * @return array containing all instruction's offset in byte code
 	 */
 	public int[] getInstructionPositions() {
@@ -1208,7 +1208,7 @@ public class InstructionList implements Serializable {
 
 	/**
 	 * Redirect all references from old_target to new_target, i.e., update targets of branch instructions.
-	 * 
+	 *
 	 * @param old_target the old target instruction handle
 	 * @param new_target the new target instruction handle
 	 */
@@ -1239,7 +1239,7 @@ public class InstructionList implements Serializable {
 
 	/**
 	 * Redirect all references of local variables from old_target to new_target.
-	 * 
+	 *
 	 * @param lg array of local variables
 	 * @param old_target the old target instruction handle
 	 * @param new_target the new target instruction handle
@@ -1261,7 +1261,7 @@ public class InstructionList implements Serializable {
 
 	/**
 	 * Redirect all references of exception handlers from old_target to new_target.
-	 * 
+	 *
 	 * @param exceptions array of exception handlers
 	 * @param old_target the old target instruction handle
 	 * @param new_target the new target instruction handle
diff --git a/bcel-builder/src/main/java/org/aspectj/apache/bcel/generic/InstructionSelect.java b/bcel-builder/src/main/java/org/aspectj/apache/bcel/generic/InstructionSelect.java
index 408f801ff..771461ab5 100644
--- a/bcel-builder/src/main/java/org/aspectj/apache/bcel/generic/InstructionSelect.java
+++ b/bcel-builder/src/main/java/org/aspectj/apache/bcel/generic/InstructionSelect.java
@@ -60,7 +60,7 @@ import org.aspectj.apache.bcel.util.ByteSequence;
 
 /**
  * Select - Abstract super class for LOOKUPSWITCH and TABLESWITCH instructions.
- * 
+ *
  * @version $Id: InstructionSelect.java,v 1.4 2009/10/05 17:35:36 aclement Exp $
  * @author <A HREF="mailto:markus.dahm@berlin.de">M. Dahm</A>
  * @see LOOKUPSWITCH
@@ -79,7 +79,7 @@ public abstract class InstructionSelect extends InstructionBranch {
 
 	/**
 	 * (Match, target) pairs for switch. `Match' and `targets' must have the same length of course.
-	 * 
+	 *
 	 * @param match array of matching values
 	 * @param targets instruction targets
 	 * @param target default instruction target
@@ -119,11 +119,11 @@ public abstract class InstructionSelect extends InstructionBranch {
 	/**
 	 * Since this is a variable length instruction, it may shift the following instructions which then need to update their
 	 * position.
-	 * 
+	 *
 	 * Called by InstructionList.setPositions when setting the position for every instruction. In the presence of variable length
 	 * instructions `setPositions' performs multiple passes over the instruction list to calculate the correct (byte) positions and
 	 * offsets by calling this function.
-	 * 
+	 *
 	 * @param offset additional offset caused by preceding (variable length) instructions
 	 * @param max_offset the maximum offset that may be caused by these instructions
 	 * @return additional offset caused by possible change of this instruction's length
@@ -146,7 +146,7 @@ public abstract class InstructionSelect extends InstructionBranch {
 
 	/**
 	 * Dump instruction as byte code to stream out.
-	 * 
+	 *
 	 * @param out Output stream
 	 */
 	public void dump(DataOutputStream out) throws IOException {
@@ -177,7 +177,7 @@ public abstract class InstructionSelect extends InstructionBranch {
 	 * @return mnemonic for instruction
 	 */
 	public String toString(boolean verbose) {
-		StringBuffer buf = new StringBuffer(super.toString(verbose));
+		StringBuilder buf = new StringBuilder(super.toString(verbose));
 
 		if (verbose) {
 			for (int i = 0; i < matchLength; i++) {
diff --git a/bcel-builder/src/main/java/org/aspectj/apache/bcel/generic/MethodGen.java b/bcel-builder/src/main/java/org/aspectj/apache/bcel/generic/MethodGen.java
index 6bc66480f..ced5e3be5 100644
--- a/bcel-builder/src/main/java/org/aspectj/apache/bcel/generic/MethodGen.java
+++ b/bcel-builder/src/main/java/org/aspectj/apache/bcel/generic/MethodGen.java
@@ -79,10 +79,10 @@ import org.aspectj.apache.bcel.classfile.annotation.RuntimeParamAnnos;
  * Template class for building up a method. This is done by defining exception handlers, adding thrown exceptions, local variables
  * and attributes, whereas the 'LocalVariableTable' and 'LineNumberTable' attributes will be set automatically for the code. Use
  * stripAttributes() if you don't like this.
- * 
+ *
  * While generating code it may be necessary to insert NOP operations. You can use the `removeNOPs' method to get rid off them. The
  * resulting method object can be obtained via the `getMethod()' method.
- * 
+ *
  * @version $Id: MethodGen.java,v 1.17 2011/05/19 23:23:46 aclement Exp $
  * @author <A HREF="mailto:markus.dahm@berlin.de">M. Dahm</A>
  * @author <A HREF="http://www.vmeng.com/beard">Patrick C. Beard</A> [setMaxStack()]
@@ -115,10 +115,10 @@ public class MethodGen extends FieldGenOrMethodGen {
 	 * Declare method. If the method is non-static the constructor automatically declares a local variable `$this' in slot 0. The
 	 * actual code is contained in the `il' parameter, which may further manipulated by the user. But he must take care not to
 	 * remove any instruction (handles) that are still referenced from this object.
-	 * 
+	 *
 	 * For example one may not add a local variable and later remove the instructions it refers to without causing havoc. It is safe
 	 * however if you remove that local variable, too.
-	 * 
+	 *
 	 * @param access_flags access qualifiers
 	 * @param return_type method type
 	 * @param arg_types argument types
@@ -164,7 +164,7 @@ public class MethodGen extends FieldGenOrMethodGen {
 		// throw new ClassGenException("'void' is an illegal argument type for a method");
 		// }
 		// }
-		//	
+		//
 		// if(arg_names != null) { // Names for variables provided?
 		// if(size != arg_names.length)
 		// throw new ClassGenException("Mismatch in argument array lengths: " +
@@ -192,7 +192,7 @@ public class MethodGen extends FieldGenOrMethodGen {
 
 	/**
 	 * Instantiate from existing method.
-	 * 
+	 *
 	 * @param m method
 	 * @param class_name class name containing this method
 	 * @param cp constant pool
@@ -362,7 +362,7 @@ public class MethodGen extends FieldGenOrMethodGen {
 
 	/**
 	 * Adds a local variable to this method and assigns an index automatically.
-	 * 
+	 *
 	 * @param name variable name
 	 * @param type variable type
 	 * @param start from where the variable is valid, if this is null, it is valid from the start
@@ -424,7 +424,7 @@ public class MethodGen extends FieldGenOrMethodGen {
 	/*
 	 * If the range of the variable has not been set yet, it will be set to be valid from the start to the end of the instruction
 	 * list.
-	 * 
+	 *
 	 * @return array of declared local variables sorted by index
 	 */
 	public LocalVariableGen[] getLocalVariables() {
@@ -466,7 +466,7 @@ public class MethodGen extends FieldGenOrMethodGen {
 
 	/**
 	 * Give an instruction a line number corresponding to the source code line.
-	 * 
+	 *
 	 * @param ih instruction to tag
 	 * @return new line number object
 	 * @see LineNumber
@@ -517,7 +517,7 @@ public class MethodGen extends FieldGenOrMethodGen {
 	/**
 	 * Add an exception handler, i.e., specify region where a handler is active and an instruction where the actual handling is
 	 * done.
-	 * 
+	 *
 	 * @param start_pc Start of region (inclusive)
 	 * @param end_pc End of region (inclusive)
 	 * @param handler_pc Where handling is done
@@ -578,7 +578,7 @@ public class MethodGen extends FieldGenOrMethodGen {
 
 	/**
 	 * Add an exception possibly thrown by this method.
-	 * 
+	 *
 	 * @param class_name (fully qualified) name of exception
 	 */
 	public void addException(String class_name) {
@@ -629,7 +629,7 @@ public class MethodGen extends FieldGenOrMethodGen {
 	 * Add an attribute to the code. Currently, the JVM knows about the LineNumberTable, LocalVariableTable and StackMap attributes,
 	 * where the former two will be generated automatically and the latter is used for the MIDP only. Other attributes will be
 	 * ignored by the JVM but do no harm.
-	 * 
+	 *
 	 * @param a attribute to be added
 	 */
 	public void addCodeAttribute(Attribute a) {
@@ -674,7 +674,7 @@ public class MethodGen extends FieldGenOrMethodGen {
 	/**
 	 * Get method object. Never forget to call setMaxStack() or setMaxStack(max), respectively, before calling this method (the same
 	 * applies for max locals).
-	 * 
+	 *
 	 * @return method object
 	 */
 	public Method getMethod() {
@@ -879,10 +879,10 @@ public class MethodGen extends FieldGenOrMethodGen {
 	public void setMaxLocals() {
 		setMaxLocals(false);
 	}
-	
+
 	/**
 	 * Compute maximum number of local variables.
-	 * 
+	 *
 	 * @param respectLocalVariableTable if true and the local variable table indicates more are in use
 	 * than the code suggests, respect the higher value from the local variable table data.
 	 */
@@ -966,7 +966,7 @@ public class MethodGen extends FieldGenOrMethodGen {
 
 	/**
 	 * Computes stack usage of an instruction list by performing control flow analysis.
-	 * 
+	 *
 	 * @return maximum stack depth used by method
 	 */
 	public static int getMaxStack(ConstantPool cp, InstructionList il, CodeExceptionGen[] et) {
@@ -1050,7 +1050,7 @@ public class MethodGen extends FieldGenOrMethodGen {
 
 	/**
 	 * Return string representation close to declaration format, `public static void main(String[]) throws IOException', e.g.
-	 * 
+	 *
 	 * @return String representation of the method.
 	 */
 	@Override
@@ -1060,7 +1060,7 @@ public class MethodGen extends FieldGenOrMethodGen {
 
 		signature = Utility.methodSignatureToString(signature, name, access, true, getLocalVariableTable(cp));
 
-		StringBuffer buf = new StringBuffer(signature);
+		StringBuilder buf = new StringBuilder(signature);
 
 		if (exceptionsThrown.size() > 0) {
 			for (String s : exceptionsThrown) {
diff --git a/bcel-builder/src/main/java/org/aspectj/apache/bcel/generic/ObjectType.java b/bcel-builder/src/main/java/org/aspectj/apache/bcel/generic/ObjectType.java
index 544363f16..d7282122c 100644
--- a/bcel-builder/src/main/java/org/aspectj/apache/bcel/generic/ObjectType.java
+++ b/bcel-builder/src/main/java/org/aspectj/apache/bcel/generic/ObjectType.java
@@ -59,7 +59,7 @@ import org.aspectj.apache.bcel.classfile.JavaClass;
 
 /**
  * Denotes reference such as java.lang.String.
- * 
+ *
  * @version $Id: ObjectType.java,v 1.7 2009/09/28 16:39:46 aclement Exp $
  * @author <A HREF="mailto:markus.dahm@berlin.de">M. Dahm</A>
  */
@@ -84,7 +84,7 @@ public class ObjectType extends ReferenceType {
 	}
 
 	private static String toSignature(String classname) {
-		StringBuffer sig = new StringBuffer();
+		StringBuilder sig = new StringBuilder();
 		sig.append("L").append(classname.replace('.', '/'));
 		sig.append(";");
 		return sig.toString();
diff --git a/bcel-builder/src/main/java/org/aspectj/apache/bcel/generic/Type.java b/bcel-builder/src/main/java/org/aspectj/apache/bcel/generic/Type.java
index ed8995ef0..79361a7ed 100644
--- a/bcel-builder/src/main/java/org/aspectj/apache/bcel/generic/Type.java
+++ b/bcel-builder/src/main/java/org/aspectj/apache/bcel/generic/Type.java
@@ -67,10 +67,10 @@ import org.aspectj.apache.bcel.classfile.Utility;
 /**
  * Abstract super class for all possible java types, namely basic types such as int, object types like String and array types, e.g.
  * int[]
- * 
+ *
  * @version $Id: Type.java,v 1.14 2011/09/28 01:14:54 aclement Exp $
  * @author <A HREF="mailto:markus.dahm@berlin.de">M. Dahm</A>
- * 
+ *
  *         modified: AndyClement 2-mar-05: Removed unnecessary static and optimized
  */
 public abstract class Type {
@@ -233,7 +233,7 @@ public abstract class Type {
 
 	/**
 	 * Convert signature to a Type object.
-	 * 
+	 *
 	 * @param signature signature string such as Ljava/lang/String;
 	 * @return type object
 	 */
@@ -292,7 +292,7 @@ public abstract class Type {
 
 	/**
 	 * Convert return value of a method (signature) to a Type object.
-	 * 
+	 *
 	 * @param signature signature string such as (Ljava/lang/String;)V
 	 * @return return type
 	 */
@@ -308,7 +308,7 @@ public abstract class Type {
 
 	/**
 	 * Convert arguments of a method (signature) to an array of Type objects.
-	 * 
+	 *
 	 * @param signature signature string such as (Ljava/lang/String;)V
 	 * @return array of argument types
 	 */
@@ -419,7 +419,7 @@ public abstract class Type {
 
 	/**
 	 * Convert runtime java.lang.Class to BCEL Type object.
-	 * 
+	 *
 	 * @param cl Java class
 	 * @return corresponding Type object
 	 */
@@ -463,7 +463,7 @@ public abstract class Type {
 	}
 
 	public static String getSignature(java.lang.reflect.Method meth) {
-		StringBuffer sb = new StringBuffer("(");
+		StringBuilder sb = new StringBuilder("(");
 		Class[] params = meth.getParameterTypes(); // avoid clone
 
 		for (Class param : params) {
@@ -476,7 +476,7 @@ public abstract class Type {
 	}
 
 	public static String getSignature(java.lang.reflect.Constructor<?> cons) {
-		StringBuffer sb = new StringBuffer("(");
+		StringBuilder sb = new StringBuilder("(");
 		Class<?>[] params = cons.getParameterTypes(); // avoid clone
 
 		for (Class<?> param : params) {
diff --git a/bcel-builder/src/main/java/org/aspectj/apache/bcel/util/ClassLoaderRepository.java b/bcel-builder/src/main/java/org/aspectj/apache/bcel/util/ClassLoaderRepository.java
index be9aa0b45..e16d0efff 100644
--- a/bcel-builder/src/main/java/org/aspectj/apache/bcel/util/ClassLoaderRepository.java
+++ b/bcel-builder/src/main/java/org/aspectj/apache/bcel/util/ClassLoaderRepository.java
@@ -73,11 +73,11 @@ import org.aspectj.apache.bcel.classfile.JavaClass;
 
 /**
  * The repository maintains information about which classes have been loaded.
- * 
+ *
  * It loads its data from the ClassLoader implementation passed into its constructor.
- * 
+ *
  * @see org.aspectj.apache.bcel.Repository
- * 
+ *
  * @version $Id: ClassLoaderRepository.java,v 1.13 2009/09/09 19:56:20 aclement Exp $
  * @author <A HREF="mailto:markus.dahm@berlin.de">M. Dahm</A>
  * @author David Dixon-Peugh
@@ -334,7 +334,7 @@ public class ClassLoaderRepository implements Repository {
 	 * Produce a report on cache usage.
 	 */
 	public String report() {
-		StringBuffer sb = new StringBuffer();
+		StringBuilder sb = new StringBuilder();
 		sb.append("BCEL repository report.");
 		if (useSharedCache)
 			sb.append(" (shared cache)");
diff --git a/bcel-builder/src/main/java/org/aspectj/apache/bcel/util/ClassPath.java b/bcel-builder/src/main/java/org/aspectj/apache/bcel/util/ClassPath.java
index 29f8f6d6d..942364b92 100644
--- a/bcel-builder/src/main/java/org/aspectj/apache/bcel/util/ClassPath.java
+++ b/bcel-builder/src/main/java/org/aspectj/apache/bcel/util/ClassPath.java
@@ -217,7 +217,7 @@ public class ClassPath implements Serializable {
 					list.add(ext_dir.toString() + File.separatorChar + extension);
 		}
 
-		StringBuffer buf = new StringBuffer();
+		StringBuilder buf = new StringBuilder();
 
 		for (Iterator<String> e = list.iterator(); e.hasNext();) {
 			buf.append(e.next());
diff --git a/bcel-builder/src/test/java/org/aspectj/apache/bcel/classfile/tests/BcelTestCase.java b/bcel-builder/src/test/java/org/aspectj/apache/bcel/classfile/tests/BcelTestCase.java
index a67eaca0a..17d24d272 100644
--- a/bcel-builder/src/test/java/org/aspectj/apache/bcel/classfile/tests/BcelTestCase.java
+++ b/bcel-builder/src/test/java/org/aspectj/apache/bcel/classfile/tests/BcelTestCase.java
@@ -116,7 +116,7 @@ public abstract class BcelTestCase extends TestCase {
 	}
 
 	protected String dumpAnnotations(AnnotationGen[] as) {
-		StringBuffer result = new StringBuffer();
+		StringBuilder result = new StringBuilder();
 		result.append("[");
 		for (int i = 0; i < as.length; i++) {
 			AnnotationGen annotation = as[i];
@@ -129,7 +129,7 @@ public abstract class BcelTestCase extends TestCase {
 	}
 
 	protected String dumpAnnotations(List<AnnotationGen> as) {
-		StringBuffer result = new StringBuffer();
+		StringBuilder result = new StringBuilder();
 		result.append("[");
 		for (int i = 0; i < as.size(); i++) {
 			AnnotationGen annotation = as.get(i);
@@ -142,7 +142,7 @@ public abstract class BcelTestCase extends TestCase {
 	}
 
 	protected String dumpAttributes(Attribute[] as) {
-		StringBuffer result = new StringBuffer();
+		StringBuilder result = new StringBuilder();
 		result.append("AttributeArray:[");
 		for (int i = 0; i < as.length; i++) {
 			Attribute attr = as[i];
diff --git a/bcel-builder/src/test/java/org/aspectj/apache/bcel/classfile/tests/GenericSignatureParsingTest.java b/bcel-builder/src/test/java/org/aspectj/apache/bcel/classfile/tests/GenericSignatureParsingTest.java
index d5f53c98d..f1d06c265 100644
--- a/bcel-builder/src/test/java/org/aspectj/apache/bcel/classfile/tests/GenericSignatureParsingTest.java
+++ b/bcel-builder/src/test/java/org/aspectj/apache/bcel/classfile/tests/GenericSignatureParsingTest.java
@@ -324,7 +324,7 @@ public class GenericSignatureParsingTest extends BcelTestCase {
 	   * @return byte code signature
 	   */
 	  public static String getSignature(String type) {
-	    StringBuffer buf        = new StringBuffer();
+	    StringBuilder buf       = new StringBuilder();
 	    char[]       chars      = type.toCharArray();
 	    boolean      char_found = false, delim = false;
 	    int          index      = -1;
@@ -451,7 +451,7 @@ public class GenericSignatureParsingTest extends BcelTestCase {
 	   */
 	  public final static String methodTypeToSignature(String returnType, String[] methodArgs) throws ClassFormatException {
 
-	    StringBuffer buf = new StringBuffer("(");
+	    StringBuilder buf = new StringBuilder("(");
 
 	    if (methodArgs != null) {
 			for (String methodArg : methodArgs) {