### Changes
#### version 3.30
* `Readme.html` was deleted (GitHub Issue #414).
#### version 3.29 on May 13, 2022
* GitHub Issue #378, PR #278, #299, #382, #383, #390, #391, #395, #399, #409.
#### version 3.28 on May 8, 2021
* GitHub Issue #305, #328, #339, #350, #357, and PR #363.
#### version 3.27 on March 19, 2020
* GitHub Issue #271 (PR #279), #280 (PR #281), #282, and PR #294.
#### version 3.26 on October 3, 2019
* GitHub Issue #270 (PR #272), #265 (PR #267), #271, #222, and #275.
#### version 3.25 on April 16, 2019
* GitHub Issue #72 (PR #231), #241, #242 (PR #243), PR #244,
#246 (PR #247), PR #250, #252 (PR #253), PR #254.
#### version 3.24.1 on December 9, 2018
* GitHub Issue #228, #229
#### version 3.24 on November 1, 2018
* Java 11 supports.
* JIRA JASSIST-267.
* Github PR #218.
#### version 3.23.1 on July 2, 2018
* Github PR #171.
#### version 3.23 on June 21, 2018
* Fix leaking file handlers in ClassPool and removed ClassPath.close(). Github issue #165.
#### version 3.22 on October 10, 2017
* Java 9 supports.
* JIRA JASSIST-261.
#### version 3.21 on October 4, 2016
* JIRA JASSIST-244, 245, 248, 250, 255, 256, 259, 262.
* `javassist.tools.Callback` was modified to be Java 1.4 compatible.
The parameter type of `Callback#result()` was changed.
* The algorithm for generating a stack-map table was modified to fix github issue #83.
* A bug of ProxyFactory related to default methods was fixed. It is github issue #45.
#### version 3.20 on June 25, 2015
* JIRA JASSIST-241, 242, 246.
#### version 3.19 on January 6, 2015
* JIRA JASSIST-158, 205, 206, 207, 208, 209, 211, 212, 216, 220, 223, 224,
227, 230, 234, 235, 236, 237, 238, 240.
#### version 3.18 on June 3, 2013
* The source code repository has been moved to [GitHub](https://github.com/jboss-javassist/javassist).
* JIRA JASSIST-181, 183, 184, 189, 162, 185, 186, 188, 190, 195, 199, 201.
#### version 3.17.1 on December 3, 2012
* JIRA JASSIST-177, 178, 182.
#### version 3.17 on November 8, 2012
* OSGi bundle info is now included in the jar file.
* A stackmap generator has been rewritten.
* JIRA JASSIST-160, 163, 166, 168, 170, 171, 174, 175, 176 have been fixed.
#### version 3.16.1 on March 6, 2012
* Maven now works. JIRA JASSIST-44, 106, 156 have been fixed.
#### version 3.16 on February 19, 2012
* JIRA JASSIST-126, 127, 144, 145, 146, 147, 149, 150, 151, 152, 153, 155.
* `javassist.bytecode.analysis.ControlFlow` was added.
* Java 7 compatibility.
#### version 3.15 on July 8, 2011
* The license was changed to MPL/LGPL/Apache triple.
* JIRA JASSIST-138 and 142 were fixed.
#### version 3.14 on October 5, 2010
* JIRA JASSIST-121, 123, 128, 129, 130, 131, 132.
#### version 3.13 on July 19, 2010
* JIRA JASSIST-118, 119, 122, 124, 125.
#### version 3.12.1 on June 10, 2010
#### version 3.12 on April 16, 2010
#### version 3.11 on July 3, 2009
* JIRA JASSIST-67, 68, 74, 75, 76, 77, 81, 83, 84, 85, 86, 87 were fixed.
* Now javassist.bytecode.CodeIterator can insert a gap into
a large method body more than 32KB. (JIRA JASSIST-79, 80)
#### version 3.10 on March 5, 2009
* JIRA JASSIST-69, 70, 71 were fixed.
#### version 3.9 on October 9, 2008
* ClassPool.makeClassIfNew(InputStream) was implemented.
* CtNewMethod.wrapped(..) and CtNewConstructor.wrapped(..)
implicitly append a method like _added_m$0.
This method now has a synthetic attribute.
* JIRA JASSIST-66 has been fixed.
#### version 3.8.1 on July 17, 2008
* CtClass.rebuildClassFile() has been added.
* A few bugs of javassist.bytecode.analysis have been fixed.
3.8.0 could not correctly deal with one letter class name
such as I and J.
#### version 3.8.0 on June 13, 2008
* javassist.bytecode.analysis was implemented.
* JASSIST-45, 47, 51, 54-57, 60, 62 were fixed.
#### version 3.7.1 on March 10, 2008
* a bug of javassist.util.proxy has been fixed.
#### version 3.7 on January 20, 2008
* Several minor bugs have been fixed.
#### version 3.6.0 on September 13, 2007
#### version 3.6.0.CR1 on July 27, 2007
* The stack map table introduced since Java 6 has been supported.
* CtClass#getDeclaredBehaviors() now returns a class initializer
as well as methods and constructors.
* The default status of automatic pruning was made off.
Instead of pruning, this version of Javassist compresses
the data structure of a class file after toBytecode() is called.
The compressed class file is automatically decompressed when needed.
This saves memory space better than pruning.
* [JIRA JASSIST-33](http://jira.jboss.com/jira/browse/JASSIST-33) has been fixed.
#### version 3.5 on April 29, 2007
* Various minor updates.
#### version 3.4 on November 17, 2006
* A bug in CodeConverter#replaceFieldRead() and CodeConverter#replaceFieldWrite()
was fixed. [JBAOP-284](http://jira.jboss.com/jira/browse/JBAOP-284).
* A synchronization bug and a performance bug in `javassist.util.proxy`
have been fixed
([JASSIST-28](http://jira.jboss.com/jira/browse/JASSIST-28)).
Now generated proxy classes are cached. To turn the caching off,
set `ProxyFactory.useCache` to `false`.
#### version 3.3 on August 17, 2006
* CtClass#toClass() and ClassPool#toClass() were modified to accept a
`ProtectionDomain`
([JASSIST-23](http://jira.jboss.com/jira/browse/JASSIST-23)).
Now ClassPool#toClass(CtClass, ClassLoader) should not be overridden. All
subclasses of ClassPool must override toClass(CtClass, ClassLoader,
ProtectionDomain).
* CtClass#getAvailableAnnotations() etc. have been implemented.
* A bug related to a way of dealing with a bridge method was fixed
([HIBERNATE-37](http://jira.jboss.com/jira/browse/HIBERNATE-37)).
* javassist.scopedpool package was added.
#### version 3.2 on June 21, 2006
* The behavior of CtBehavior#getParameterAnnotations() has been changed.
It is now compatible to Java Reflection API
([JASSIST-19](http://jira.jboss.com/jira/browse/JASSIST-19)).
#### version 3.2.0.CR2 on May 9, 2006
* A bug of replace(String,ExprEditor) in javassist.expr.Expr has been fixed.
* Updated ProxyFactory getClassLoader to choose the javassit class loader
when the proxy superclass has a null class loader (a jdk/endorsed class)
([JASSIST-18](http://jira.jboss.com/jira/browse/JASSIST-18)).
* Updated the throws clause of the javassist.util.proxy.MethodHandler
to be Throwable rather than Exception
([JASSIST-16](http://jira.jboss.com/jira/browse/JASSIST-16)).
#### version 3.2.0.CR1 on March 18, 2006
* Annotations enhancements to javassist.bytecode.MethodInfo.
* Allow a ClassPool to override the "guess" at the classloader to use.
#### version 3.1 on February 23, 2006
* getFields(), getMethods(), and getConstructors() in CtClass
were changed to return non-private memebers instead of only
public members.
* getEnclosingClass() in javassist.CtClass was renamed
to getEnclosingMethod().
* getModifiers() was extended to return Modifier.STATIC if the class
is a static inner class.
* The return type of CtClass.stopPruning() was changed from void
to boolean.
* toMethod() in javassist.CtConstructor has been implemented.
* It includes new javassist.util.proxy package
similar to Enhancer of CGLIB.
* The subpackages of Javassist were restructured.
* javassist.tool package was renamed to javassist.tools.
* HotSwapper was moved to javassist.util.
* Several subpackages were moved to javassist.tools.
* javassist.preproc package was elminated and the source was
moved to the sample directory.
#### version 3.1 RC2 on September 7, 2005
* RC2 is released mainly for an administrative reason.
* A few bugs have been fixed.
#### version 3.1 RC1 on August 29, 2005
* Better annotation supports. See `CtClass.getAnnotations()`
* javassist.tool.HotSwapper was added.
* javassist.ClassPool.importPackage() was added.
* The compiler now accepts array initializers
(only one dimensional arrays).
* javassist.Dump was moved to javassist.tool.Dump.
* Many bugs were fixed.
#### version 3.0 on January 18, 2005
* The compiler now supports synchronized statements and finally
clauses.
* You can now remove a method and a field.
#### version 3.0 RC1 on September 13, 2004.
* CtClass.toClass() has been reimplemented. The behavior has been
changed.
* javassist.expr.NewArray has been implemented. It enables modifying
an expression for array creation.
* `.class` notation has been supported. The modified class
file needs javassist.runtime.DotClass at runtime.
* a bug in `CtClass.getMethods()` has been fixed.
* The compiler supports a switch statement.
#### version 3.0 beta on May 18th, 2004.
* The ClassPool framework has been redesigned.
* writeFile(), write(), ... in ClassPool have been moved to CtClass.
* The design of javassist.Translator has been changed.
* javassist.bytecode.annotation has been added for meta tags.
* CtClass.makeNestedClass() has been added.
* The methods declared in javassist.bytecode.InnerClassesAttribute
have been renamed a bit.
* Now local variables were made available in the source text passed to
CtBehavior.insertBefore(), MethodCall.replace(), etc.
* CtClass.main(), which prints the version number, has been added.
* ClassPool.SimpleLoader has been public.
* javassist.bytecode.DeprecatedAttribute has been added.
* javassist.bytecode.LocalVariableAttribute has been added.
* CtClass.getURL() and javassist.ClassPath.find() has been added.
* CtBehavior.insertAt() has been added.
* CtClass.detach() has been added.
* CodeAttribute.computeMaxStack() has been added.
#### version 2.6 in August, 2003.
* The behavior of CtClass.setSuperclass() was changed.
To obtain the previous behavior, call CtClass.replaceClassName().
* CtConstructor.setBody() now works for class initializers.
* CtNewMethod.delegator() now works for static methods.
* javassist.expr.Expr.indexOfBytecode() has been added.
* javassist.Loader has been modified so that getPackage() returns
a package object.
* Now, the compiler can correctly compile a try statement and an
infinite while-loop.
#### version 2.5.1 in May, 2003.
Simple changes for integration with JBoss AOP
* Made ClassPool.get0 protected so that subclasses of ClassPool can call it.
* Moved all access to the class cache (the field ClassPool.classes) to a method called getCached(String classname). This is so subclasses of ClassPool can override this behavior.
#### version 2.5 in May, 2003.
From this version, Javassist is part of the JBoss project.
* The license was changed from MPL to MPL/LGPL dual.
* ClassPool.removeClassPath() and ClassPath.close() have been added.
* ClassPool.makeClass(InputStream) has been added.
* CtClass.makeClassInitializer() has been added.
* javassist.expr.Expr has been changed to a public class.
* javassist.expr.Handler has been added.
* javassist.expr.MethodCall.isSuper() has been added.
* CtMethod.isEmpty() and CtConstructor.isEmpty() have been added.
* LoaderClassPath has been implemented.
#### version 2.4 in February, 2003.
* The compiler included in Javassist did not correctly work with
interface methods. This bug was fixed.
* Now javassist.bytecode.Bytecode allows more than 255 local
variables in the same method.
* javassist.expr.Instanceof and Cast have been added.
* javassist.expr.{MethodCall,NewExpr,FieldAccess,Instanceof,Cast}.where()
have been added. They return the caller-side method surrounding the
expression.
* javassist.expr.{MethodCall,NewExpr,FieldAccess,Instanceof,Cast}.mayThrow()
have been added.
* $class has been introduced.
* The parameters to replaceFieldRead(), replaceFieldWrite(),
and redirectFieldAccess() in javassist.CodeConverter are changed.
* The compiler could not correctly handle a try-catch statement.
This bug has been fixed.
#### version 2.3 in December, 2002.
* The tutorial has been revised a bit.
* SerialVersionUID class was donated by Bob Lee. Thanks.
* CtMethod.setBody() and CtConstructor.setBody() have been added.
* javassist.reflect.ClassMetaobject.useContextClassLoader has been added.
If true, the reflection package does not use Class.forName() but uses
a context class loader specified by the user.
* $sig and $type are now available.
* Bugs in Bytecode.write() and read() have been fixed.
#### version 2.2 in October, 2002.
* The tutorial has been revised.
* A new package `javassist.expr` has been added.
This is replacement of classic `CodeConverter`.
* javassist.ConstParameter was changed into
javassist.CtMethod.ConstParameter.
* javassist.FieldInitializer was renamed into
javassist.CtField.Initializer.
* A bug in javassist.bytecode.Bytecode.addInvokeinterface() has been
fixed.
* In javassist.bytecode.Bytecode, addGetfield(), addGetstatic(),
addInvokespecial(), addInvokestatic(), addInvokevirtual(),
and addInvokeinterface()
have been modified to update the current statck depth.
#### version 2.1 in July, 2002.
* javassist.CtMember and javassist.CtBehavior have been added.
* javassist.CtClass.toBytecode() has been added.
* javassist.CtClass.toClass() and javassist.ClassPool.writeAsClass()
has been added.
* javassist.ByteArrayClassPath has been added.
* javassist.bytecode.Mnemonic has been added.
* Several bugs have been fixed.
#### version 2.0 (major update) in November, 2001.
* The javassist.bytecode package has been provided. It is a
lower-level API for directly modifying a class file although
the users must have detailed knowledge of the Java bytecode.
* The mechanism for creating CtClass objects have been changed.
* javassist.tool.Dump moves to the javassist package.
version 1.0 in July, 2001.
* javassist.reflect.Metaobject and ClassMetaobject was changed.
Now they throw the same exception that they receive from a
base-level object.
#### version 0.8
* javassist.tool.Dump was added. It is a class file viewer.
* javassist.FiledInitializer.byNewArray() was added. It is for
initializing a field with an array object.
* javassist.CodeConverter.redirectMethodCall() was added.
* javassist.Run was added.
#### version 0.7
* javassit.Loader was largely modified. javassist.UserLoader was
deleted. Instead, Codebase was renamed to ClassPath
and UserClassPath was added. Now programmers who want to
customize Loader must write a class implementing UserClassPath
instead of UserLoader. This change is for sharing class search paths
between Loader and CtClass.CtClass(String).
* CtClass.addField(), addMethod(), addConstructor(), addWrapper() were
also largely modified so that it receives CtNewMethod, CtNewConstructor,
or CtNewField. The static methods for creating these objects were
added to the API.
* Constructors are now represented by CtConstructor objects.
CtConstructor is a subclass of CtMethod.
* CtClass.getUserAttribute() was removed. Use CtClass.getAttribute().
* javassist.rmi.RmiLoader was added.
* javassist.reflect.Metalevel._setMetaobject() was added. Now
metaobjects can be replaced at runtime.
#### version 0.6
* Javassist was modified to correctly deal with array types appearing
in signatures.
* A bug crashed resulting bytecode if a class includes a private static
filed. It has been fixed.
* javassist.CtNewInterface was added.
* javassist.Loader.recordClass() was renamed into makeClass().
* javassist.UserLoader.loadClass() was changed to take the second
parameter.
#### version 0.5
* a bug-fix version.
#### version 0.4
* Major update again. Many classes and methods were changed.
Most of methods taking java.lang.Class have been changed to
take javassist.CtClass.
#### version 0.3
* Major update. Many classes and methods were changed.
#### version 0.2
* Jar/zip files are supported.
#### version 0.1 on April 16, 1999.
* The first release.