Fix Javadocs

git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@1888977 13f79535-47bb-0310-9956-ffa450edef68

poi-ooxml/src/main/java/org/apache/poi/xssf/model/ExternalLinksTable.java

@@ -144,18 +144,21 @@ public class ExternalLinksTable extends POIXMLDocumentPart {
 
 
     protected class ExternalName implements Name {
-        private CTExternalDefinedName name;
+        private final CTExternalDefinedName name;
         protected ExternalName(CTExternalDefinedName name) {
             this.name = name;
         }
 
+        @Override
         public String getNameName() {
             return name.getName();
         }
+        @Override
         public void setNameName(String name) {
             this.name.setName(name);
         }
 
+        @Override
         public String getSheetName() {
             int sheetId = getSheetIndex();
             if (sheetId >= 0) {
@@ -164,29 +167,35 @@ public class ExternalLinksTable extends POIXMLDocumentPart {
                 return null;
             }
         }
+        @Override
         public int getSheetIndex() {
             if (name.isSetSheetId()) {
                 return (int)name.getSheetId();
             }
             return -1;
         }
+        @Override
         public void setSheetIndex(int sheetId) {
             name.setSheetId(sheetId);
         }
 
+        @Override
         public String getRefersToFormula() {
             // Return, without the leading =
             return name.getRefersTo().substring(1);
         }
+        @Override
         public void setRefersToFormula(String formulaText) {
             // Save with leading =
             name.setRefersTo('=' + formulaText);
         }
 
+        @Override
         public boolean isFunctionName() {
             return false;
         }
 
+        @Override
         public boolean isDeleted() {
             return false;
         }
@@ -196,12 +205,15 @@ public class ExternalLinksTable extends POIXMLDocumentPart {
             return false;
         }
 
+        @Override
         public String getComment() {
             return null;
         }
+        @Override
         public void setComment(String comment) {
             throw new IllegalStateException("Not Supported");
         }
+        @Override
         public void setFunction(boolean value) {
             throw new IllegalStateException("Not Supported");
         }

poi/src/main/java/org/apache/poi/hssf/record/SSTRecord.java

@@ -49,9 +49,9 @@ public final class SSTRecord extends ContinuableRecord {
      * according to docs ONLY SST
      */
     private int field_2_num_unique_strings;
-    private IntMapper<UnicodeString> field_3_strings;
+    private final IntMapper<UnicodeString> field_3_strings;
 
-    private SSTDeserializer deserializer;
+    private final SSTDeserializer deserializer;
 
     /**
      * Offsets from the beginning of the SST record (even across continuations)
@@ -134,6 +134,7 @@ public final class SSTRecord extends ContinuableRecord {
         return field_3_strings.get( id );
     }
 
+    @Override
     public short getSid() {
         return sid;
     }
@@ -143,8 +144,7 @@ public final class SSTRecord extends ContinuableRecord {
      * <P>
      * The data consists of sets of string data. This string data is
      * arranged as follows:
-     * </P>
-     * <pre>
+     * <pre>{@code
      * short  string_length;   // length of string data
      * byte   string_flag;     // flag specifying special string
      *                         // handling
@@ -157,12 +157,11 @@ public final class SSTRecord extends ContinuableRecord {
      *                         // array is run_count)
      * byte[] extension;       // optional extension (length of array
      *                         // is extend_length)
-     * </pre>
+     * }</pre>
      * <P>
      * The string_flag is bit mapped as follows:
-     * </P>
-     * <P>
-     * <TABLE summary="string_flag mapping">
+     * <TABLE>
+     *   <caption>string_flag mapping</caption>
      *   <TR>
      *      <TH>Bit number</TH>
      *      <TH>Meaning if 0</TH>
@@ -252,6 +251,7 @@ public final class SSTRecord extends ContinuableRecord {
         return field_3_strings.size();
     }
 
+    @Override
     protected void serialize(ContinuableRecordOutput out) {
         SSTSerializer serializer = new SSTSerializer(field_3_strings, getNumStrings(), getNumUniqueStrings() );
         serializer.serialize(out);
@@ -313,7 +313,7 @@ public final class SSTRecord extends ContinuableRecord {
         return GenericRecordUtil.getGenericProperties(
             "numStrings", this::getNumStrings,
             "numUniqueStrings", this::getNumUniqueStrings,
-            "strings", () -> field_3_strings.getElements(),
+            "strings", field_3_strings::getElements,
             "bucketAbsoluteOffsets", () -> bucketAbsoluteOffsets,
             "bucketRelativeOffsets", () -> bucketRelativeOffsets
         );

poi/src/main/java/org/apache/poi/hssf/usermodel/HSSFEvaluationWorkbook.java

@@ -67,7 +67,7 @@ public final class HSSFEvaluationWorkbook implements FormulaRenderingWorkbook, E
     public void clearAllCachedResultValues() {
         // nothing to do
     }
-    
+
     @Override
     public HSSFName createName() {
         return _uBook.createName();
@@ -82,7 +82,7 @@ public final class HSSFEvaluationWorkbook implements FormulaRenderingWorkbook, E
     public int getExternalSheetIndex(String workbookName, String sheetName) {
         return _iBook.getExternalSheetIndex(workbookName, sheetName);
     }
-    
+
     @Override
     public Ptg get3DReferencePtg(CellReference cr, SheetIdentifier sheet) {
         int extIx = getSheetExtIx(sheet);
@@ -107,7 +107,7 @@ public final class HSSFEvaluationWorkbook implements FormulaRenderingWorkbook, E
      *
      * @param name the name to search
      * @param sheetIndex  the 0-based index of the sheet this formula belongs to.
-     * The sheet index is required to resolve sheet-level names. <code>-1</code> means workbook-global names
+     * The sheet index is required to resolve sheet-level names. {@code -1} means workbook-global names
      */
     @Override
     public EvaluationName getName(String name, int sheetIndex) {
@@ -160,10 +160,10 @@ public final class HSSFEvaluationWorkbook implements FormulaRenderingWorkbook, E
                 // Not actually sheet based at all - is workbook scoped
                 return null;
             }
-            
+
             // Look up the local sheet
             String sheetName = getSheetName(localSheetIndex);
-            
+
             // Is it a single local sheet, or a range?
             int lastLocalSheetIndex = _iBook.getLastSheetIndexFromExternSheetIndex(externSheetIndex);
             if (lastLocalSheetIndex == localSheetIndex) {
@@ -177,7 +177,7 @@ public final class HSSFEvaluationWorkbook implements FormulaRenderingWorkbook, E
     }
 
     /**
-     * @throws IllegalStateException: XSSF-style external references are not supported for HSSF
+     * @throws IllegalStateException XSSF-style external references are not supported for HSSF
      */
     @Override
     public ExternalSheet getExternalSheet(String firstSheetName, String lastSheetName, int externalWorkbookNumber) {
@@ -190,7 +190,7 @@ public final class HSSFEvaluationWorkbook implements FormulaRenderingWorkbook, E
     }
 
     /**
-     * @throws IllegalStateException: XSSF-style external names are not supported for HSSF
+     * @throws IllegalStateException XSSF-style external names are not supported for HSSF
      */
     @Override
     public ExternalName getExternalName(String nameName, String sheetName, int externalWorkbookNumber) {
@@ -275,14 +275,14 @@ public final class HSSFEvaluationWorkbook implements FormulaRenderingWorkbook, E
         if (sheetIden == null) {
             extIx = -1;
         } else {
-            String workbookName = sheetIden.getBookName(); 
+            String workbookName = sheetIden.getBookName();
             String firstSheetName = sheetIden.getSheetIdentifier().getName();
             String lastSheetName = firstSheetName;
-            
+
             if (sheetIden instanceof SheetRangeIdentifier) {
                 lastSheetName = ((SheetRangeIdentifier)sheetIden).getLastSheetIdentifier().getName();
             }
-            
+
             if (workbookName == null) {
                 int firstSheetIndex = _uBook.getSheetIndex(firstSheetName);
                 int lastSheetIndex = _uBook.getSheetIndex(lastSheetName);
@@ -300,7 +300,7 @@ public final class HSSFEvaluationWorkbook implements FormulaRenderingWorkbook, E
     }
 
     /**
-      * @throws IllegalStateException: data tables are not supported in Excel 97-2003 format
+      * @throws IllegalStateException data tables are not supported in Excel 97-2003 format
       */
     @Override
     public Table getTable(String name) {

poi/src/main/java/org/apache/poi/hssf/usermodel/HSSFName.java

@@ -32,12 +32,12 @@ import org.apache.poi.ss.util.CellReference;
  * 'named range' or name of a user defined function.
  */
 public final class HSSFName implements Name {
-    
-    private HSSFWorkbook _book;
-    private NameRecord _definedNameRec;
-    private NameCommentRecord _commentRec;
 
-    /** 
+    private final HSSFWorkbook _book;
+    private final NameRecord _definedNameRec;
+    private final NameCommentRecord _commentRec;
+
+    /**
      * Creates new HSSFName   - called by HSSFWorkbook to create a name from
      * scratch.
      *
@@ -48,7 +48,7 @@ public final class HSSFName implements Name {
     /* package */ HSSFName(HSSFWorkbook book, NameRecord name) {
       this(book, name, null);
     }
-    /** 
+    /**
      * Creates new HSSFName   - called by HSSFWorkbook to create a name from
      * scratch.
      *
@@ -66,6 +66,7 @@ public final class HSSFName implements Name {
     /** Get the sheets name which this named range is referenced to
      * @return sheet name, which this named range referred to
      */
+    @Override
     public String getSheetName() {
         int indexToExternSheet = _definedNameRec.getExternSheetNumber();
 
@@ -75,6 +76,7 @@ public final class HSSFName implements Name {
     /**
      * @return text name of this defined name
      */
+    @Override
     public String getNameName(){
         return _definedNameRec.getNameText();
     }
@@ -104,7 +106,7 @@ public final class HSSFName implements Name {
      * <p>
      * A name must always be unique within its scope. POI prevents you from defining a name that is not unique
      * within its scope. However you can use the same name in different scopes. Example:
-     * <pre><blockquote>
+     * <pre>{@code
      * //by default names are workbook-global
      * HSSFName name;
      * name = workbook.createName();
@@ -122,12 +124,12 @@ public final class HSSFName implements Name {
      * name.setSheetIndex(0);
      * name.setNameName("sales_08");  //will throw an exception: "The sheet already contains this name (case-insensitive)"
      *
-     * </blockquote></pre>
-    * </p>
+     * }</pre>
      *
      * @param nameName named range name to set
      * @throws IllegalArgumentException if the name is invalid or the name already exists (case-insensitive)
      */
+    @Override
     public void setNameName(String nameName){
         validateName(nameName);
 
@@ -149,7 +151,7 @@ public final class HSSFName implements Name {
                 }
             }
         }
-        
+
         // Update our comment, if there is one
         if(_commentRec != null) {
            _commentRec.setNameText(nameName);
@@ -159,21 +161,21 @@ public final class HSSFName implements Name {
 
     /**
      * https://support.office.com/en-us/article/Define-and-use-names-in-formulas-4D0F13AC-53B7-422E-AFD2-ABD7FF379C64#bmsyntax_rules_for_names
-     * 
+     *
      * Valid characters:
      *   First character: { letter | underscore | backslash }
      *   Remaining characters: { letter | number | period | underscore }
-     *   
+     *
      * Cell shorthand: cannot be { "C" | "c" | "R" | "r" }
-     * 
+     *
      * Cell references disallowed: cannot be a cell reference $A$1 or R1C1
-     * 
+     *
      * Spaces are not valid (follows from valid characters above)
-     * 
+     *
      * Name length: (XSSF-specific?) 255 characters maximum
-     * 
+     *
      * Case sensitivity: all names are case-insensitive
-     * 
+     *
      * Uniqueness: must be unique (for names with the same scope)
      */
     private static void validateName(String name) {
@@ -187,7 +189,7 @@ public final class HSSFName implements Name {
         if (name.equalsIgnoreCase("R") || name.equalsIgnoreCase("C")) {
             throw new IllegalArgumentException("Invalid name: '"+name+"': cannot be special shorthand R or C");
         }
-        
+
         // is first character valid?
         char c = name.charAt(0);
         String allowedSymbols = "_\\";
@@ -195,7 +197,7 @@ public final class HSSFName implements Name {
         if (!characterIsValid) {
             throw new IllegalArgumentException("Invalid name: '"+name+"': first character must be underscore or a letter");
         }
-        
+
         // are all other characters valid?
         allowedSymbols = "_.\\"; //backslashes needed for unicode escape
         for (final char ch : name.toCharArray()) {
@@ -204,7 +206,7 @@ public final class HSSFName implements Name {
                 throw new IllegalArgumentException("Invalid name: '"+name+"': name must be letter, digit, period, or underscore");
             }
         }
-        
+
         // Is the name a valid $A$1 cell reference
         // Because $, :, and ! are disallowed characters, A1-style references become just a letter-number combination
         if (name.matches("[A-Za-z]+\\d+")) {
@@ -214,18 +216,20 @@ public final class HSSFName implements Name {
                 throw new IllegalArgumentException("Invalid name: '"+name+"': cannot be $A$1-style cell reference");
             }
         }
-        
+
         // Is the name a valid R1C1 cell reference?
         if (name.matches("[Rr]\\d+[Cc]\\d+")) {
             throw new IllegalArgumentException("Invalid name: '"+name+"': cannot be R1C1-style cell reference");
         }
     }
 
+    @Override
     public void setRefersToFormula(String formulaText) {
         Ptg[] ptgs = HSSFFormulaParser.parse(formulaText, _book, FormulaType.NAMEDRANGE, getSheetIndex());
         _definedNameRec.setNameDefinition(ptgs);
     }
 
+    @Override
     public String getRefersToFormula() {
         if (_definedNameRec.isFunctionName()) {
             throw new IllegalStateException("Only applicable to named ranges");
@@ -240,9 +244,9 @@ public final class HSSFName implements Name {
 
 
     /**
-     * Sets the NameParsedFormula structure that specifies the formula for the 
+     * Sets the NameParsedFormula structure that specifies the formula for the
      * defined name.
-     * 
+     *
      * @param ptgs the sequence of {@link Ptg}s for the formula.
      */
     void setNameDefinition(Ptg[] ptgs) {
@@ -250,6 +254,7 @@ public final class HSSFName implements Name {
     }
 
 
+    @Override
     public boolean isDeleted(){
         Ptg[] ptgs = _definedNameRec.getNameDefinition();
         return Ptg.doesFormulaReferToDeletedCell(ptgs);
@@ -260,6 +265,7 @@ public final class HSSFName implements Name {
      *
      * @return true if this name is a function name
      */
+    @Override
     public boolean isFunctionName() {
         return _definedNameRec.isFunctionName();
     }
@@ -270,6 +276,7 @@ public final class HSSFName implements Name {
      *
      * @return true if this name is a hidden one
      */
+    @Override
     public boolean isHidden() {
         return _definedNameRec.isHiddenName();
     }
@@ -287,6 +294,7 @@ public final class HSSFName implements Name {
      * to the collection of sheets as they appear in the workbook.
      * @throws IllegalArgumentException if the sheet index is invalid.
      */
+    @Override
     public void setSheetIndex(int index){
         int lastSheetIx = _book.getNumberOfSheets() - 1;
         if (index < -1 || index > lastSheetIx) {
@@ -302,6 +310,7 @@ public final class HSSFName implements Name {
      *
      * @return the sheet index this name applies to, -1 if this name applies to the entire workbook
      */
+    @Override
     public int getSheetIndex(){
         return _definedNameRec.getSheetNumber() - 1;
     }
@@ -311,6 +320,7 @@ public final class HSSFName implements Name {
      *
      * @return the user comment for this named range
      */
+    @Override
     public String getComment() {
         if(_commentRec != null) {
            // Prefer the comment record if it has text in it
@@ -327,6 +337,7 @@ public final class HSSFName implements Name {
      *
      * @param comment the user comment for this named range
      */
+    @Override
     public void setComment(String comment){
         // Update the main record
         _definedNameRec.setDescriptionText(comment);
@@ -340,8 +351,9 @@ public final class HSSFName implements Name {
      * Indicates that the defined name refers to a user-defined function.
      * This attribute is used when there is an add-in or other code project associated with the file.
      *
-     * @param value <code>true</code> indicates the name refers to a function.
+     * @param value {@code true} indicates the name refers to a function.
      */
+    @Override
     public void setFunction(boolean value) {
         _definedNameRec.setFunction(value);
     }

poi/src/main/java/org/apache/poi/poifs/crypt/CryptoFunctions.java

@@ -370,7 +370,7 @@ public final class CryptoFunctions {
      *
      * @see <a href="http://msdn.microsoft.com/en-us/library/dd926947.aspx">2.3.7.1 Binary Document Password Verifier Derivation Method 1</a>
      * @see <a href="http://msdn.microsoft.com/en-us/library/dd905229.aspx">2.3.7.4 Binary Document Password Verifier Derivation Method 2</a>
-     * @see <a href="http://www.ecma-international.org/news/TC45_current_work/Office Open XML Part 4 - Markup Language Reference.pdf">Part 4 - Markup Language Reference - Ecma International - 3.2.12 fileSharing</a>
+     * @see <a href="https://www.ecma-international.org/publications-and-standards/standards/ecma-376/">Part 4 - Markup Language Reference - Ecma International - 3.2.12 fileSharing</a>
      *
      * @param password the password
      * @return the verifier (actually a short value)

poi/src/main/java/org/apache/poi/ss/SpreadsheetVersion.java

@@ -49,7 +49,7 @@ public enum SpreadsheetVersion {
      * (actually limited by available memory in Excel)</li>
      * <li>Number of cell styles is 64000</li>
      * <li>Length of text cell contents is 32767</li>
-     * <ul>
+     * </ul>
      */
     EXCEL2007(0x100000, 0x4000, 255, Integer.MAX_VALUE, 64000, 32767);
 
@@ -60,7 +60,7 @@ public enum SpreadsheetVersion {
     private final int _maxCellStyles;
     private final int _maxTextLength;
 
-    private SpreadsheetVersion(int maxRows, int maxColumns, int maxFunctionArgs, int maxCondFormats, int maxCellStyles, int maxText) {
+    SpreadsheetVersion(int maxRows, int maxColumns, int maxFunctionArgs, int maxCondFormats, int maxCellStyles, int maxText) {
         _maxRows = maxRows;
         _maxColumns = maxColumns;
         _maxFunctionArgs = maxFunctionArgs;
@@ -77,7 +77,7 @@ public enum SpreadsheetVersion {
     }
 
     /**
-     * @return the last (maximum) valid row index, equals to <code> getMaxRows() - 1 </code>
+     * @return the last (maximum) valid row index, equals to {@code getMaxRows() - 1 }
      */
     public int getLastRowIndex() {
         return _maxRows - 1;
@@ -91,7 +91,7 @@ public enum SpreadsheetVersion {
     }
 
     /**
-     * @return the last (maximum) valid column index, equals to <code> getMaxColumns() - 1 </code>
+     * @return the last (maximum) valid column index, equals to {@code getMaxColumns() - 1 }
      */
     public int getLastColumnIndex() {
         return _maxColumns - 1;
@@ -121,7 +121,7 @@ public enum SpreadsheetVersion {
     /**
      *
      * @return the last valid column index in a ALPHA-26 representation
-     *  (<code>IV</code> or <code>XFD</code>).
+     *  ({@code IV} or {@code XFD}).
      */
     public String getLastColumnName() {
         return CellReference.convertNumToColString(getLastColumnIndex());

poi/src/main/java/org/apache/poi/ss/format/CellFormatter.java

@@ -17,7 +17,6 @@
 package org.apache.poi.ss.format;
 
 import java.util.Locale;
-import java.util.logging.Logger;
 
 import org.apache.poi.util.LocaleUtil;
 
@@ -25,9 +24,6 @@ import org.apache.poi.util.LocaleUtil;
  * This is the abstract supertype for the various cell formatters.
  */
 public abstract class CellFormatter {
-    /** The logger to use in the formatting code. */
-    private static final Logger LOG = Logger.getLogger(CellFormatter.class.getName());
-
     /** The original specified format. */
     protected final String format;
     protected final Locale locale;
@@ -54,7 +50,7 @@ public abstract class CellFormatter {
 
     /**
      * Format a value according the format string.
-     * <p/>
+     * <p>
      * NOTE: this method must be thread safe!  In particular, if it uses a
      * Format instance that is not thread safe, i.e. DateFormat, this method
      * must be synchronized, either on the method, if the format is a final
@@ -67,7 +63,7 @@ public abstract class CellFormatter {
 
     /**
      * Format a value according to the type, in the most basic way.
-     * <p/>
+     * <p>
      * NOTE: this method must be thread safe!  In particular, if it uses a
      * Format instance that is not thread safe, i.e. DateFormat, this method
      * must be synchronized, either on the method, if the format is a final

poi/src/main/java/org/apache/poi/ss/format/CellGeneralFormatter.java

@@ -41,6 +41,7 @@ public class CellGeneralFormatter extends CellFormatter {
      * @param toAppendTo The buffer to append to.
      * @param value      The value to format.
      */
+    @Override
     public void formatValue(StringBuffer toAppendTo, Object value) {
         if (value instanceof Number) {
             double val = ((Number) value).doubleValue();
@@ -86,6 +87,7 @@ public class CellGeneralFormatter extends CellFormatter {
     }
 
     /** Equivalent to {@link #formatValue(StringBuffer,Object)}. {@inheritDoc}. */
+    @Override
     public void simpleValue(StringBuffer toAppendTo, Object value) {
         formatValue(toAppendTo, value);
     }

poi/src/main/java/org/apache/poi/ss/format/CellTextFormatter.java

@@ -50,7 +50,7 @@ public class CellTextFormatter extends CellFormatter {
         }
     }
 
-    /** {@inheritDoc} */
+    @Override
     public void formatValue(StringBuffer toAppendTo, Object obj) {
         int start = toAppendTo.length();
         String text = obj.toString();
@@ -69,6 +69,7 @@ public class CellTextFormatter extends CellFormatter {
      * <p>
      * For text, this is just printing the text.
      */
+    @Override
     public void simpleValue(StringBuffer toAppendTo, Object value) {
         SIMPLE_TEXT.formatValue(toAppendTo, value);
     }

poi/src/main/java/org/apache/poi/ss/formula/EvaluationWorkbook.java

@@ -81,7 +81,7 @@ public interface EvaluationWorkbook {
      *
      * @since POI 3.15 beta 3
      */
-    public void clearAllCachedResultValues();
+    void clearAllCachedResultValues();
 
     class ExternalSheet {
         private final String _workbookName;

poi/src/main/java/org/apache/poi/ss/formula/FormulaRenderingWorkbook.java

@@ -28,7 +28,7 @@ import org.apache.poi.util.Internal;
 @Internal
 public interface FormulaRenderingWorkbook {
 	/**
-	 * @return <code>null</code> if externSheetIndex refers to a sheet inside the current workbook
+	 * @return {@code null} if externSheetIndex refers to a sheet inside the current workbook
 	 */
 	ExternalSheet getExternalSheet(int externSheetIndex);
 

poi/src/main/java/org/apache/poi/ss/formula/eval/TwoOperandNumericOperation.java

@@ -20,8 +20,6 @@ package org.apache.poi.ss.formula.eval;
 import org.apache.poi.ss.formula.functions.ArrayFunction;
 import org.apache.poi.ss.formula.functions.Fixed2ArgFunction;
 import org.apache.poi.ss.formula.functions.Function;
-import org.apache.poi.ss.formula.functions.MatrixFunction.MutableValueCollector;
-import org.apache.poi.ss.formula.functions.MatrixFunction.TwoArrayArg;
 
 public abstract class TwoOperandNumericOperation extends Fixed2ArgFunction implements ArrayFunction {
 
@@ -30,7 +28,8 @@ public abstract class TwoOperandNumericOperation extends Fixed2ArgFunction imple
 		return OperandResolver.coerceValueToDouble(ve);
 	}
 
-	public ValueEval evaluateArray(ValueEval[] args, int srcRowIndex, int srcColumnIndex) {
+	@Override
+    public ValueEval evaluateArray(ValueEval[] args, int srcRowIndex, int srcColumnIndex) {
 	    if (args.length != 2) {
 	        return ErrorEval.VALUE_INVALID;
 	    }
@@ -50,6 +49,7 @@ public abstract class TwoOperandNumericOperation extends Fixed2ArgFunction imple
 
 	}
 
+	@Override
 	public ValueEval evaluate(int srcRowIndex, int srcColumnIndex, ValueEval arg0, ValueEval arg1) {
 		double result;
 		try {
@@ -73,35 +73,14 @@ public abstract class TwoOperandNumericOperation extends Fixed2ArgFunction imple
 
 	protected abstract double evaluate(double d0, double d1) throws EvaluationException;
 
-	private final class ArrayEval extends TwoArrayArg {
-	    private final MutableValueCollector instance = new MutableValueCollector(true, true);
-
-        protected double[] collectValues(ValueEval arg) throws EvaluationException {
-            return instance.collectValues(arg);
-        }
-
-	    protected double[][] evaluate(double[][] d1, double[][] d2) throws IllegalArgumentException, EvaluationException {
-	        int width = (d1[0].length < d2[0].length) ? d1[0].length : d2[0].length;
-	        int height = (d1.length < d2.length) ? d1.length : d2.length;
-
-            double[][] result = new double[height][width];
-
-	        for (int j = 0; j < height; j++) {
-	            for (int i = 0; i < width; i++) {
-	                result[j][i] = TwoOperandNumericOperation.this.evaluate(d1[j][i], d2[j][i]);
-	            }
-	        }
-
-	        return result;
-	    }
-	}
-
 	public static final Function AddEval = new TwoOperandNumericOperation() {
+		@Override
 		protected double evaluate(double d0, double d1) {
 			return d0+d1;
 		}
 	};
 	public static final Function DivideEval = new TwoOperandNumericOperation() {
+		@Override
 		protected double evaluate(double d0, double d1) throws EvaluationException {
 			if (d1 == 0.0) {
 				throw new EvaluationException(ErrorEval.DIV_ZERO);
@@ -110,11 +89,13 @@ public abstract class TwoOperandNumericOperation extends Fixed2ArgFunction imple
 		}
 	};
 	public static final Function MultiplyEval = new TwoOperandNumericOperation() {
+		@Override
 		protected double evaluate(double d0, double d1) {
 			return d0*d1;
 		}
 	};
 	public static final Function PowerEval = new TwoOperandNumericOperation() {
+		@Override
 		protected double evaluate(double d0, double d1) {
 			if(d0 < 0 && Math.abs(d1) > 0.0 && Math.abs(d1) < 1.0) {
 				return -1 * Math.pow(d0 * -1, d1);
@@ -126,6 +107,7 @@ public abstract class TwoOperandNumericOperation extends Fixed2ArgFunction imple
 		public SubtractEvalClass() {
 			//
 		}
+		@Override
 		protected double evaluate(double d0, double d1) {
 			return d0-d1;
 		}

poi/src/main/java/org/apache/poi/ss/formula/eval/forked/ForkedEvaluationWorkbook.java

@@ -36,7 +36,7 @@ import org.apache.poi.util.Internal;
  * Represents a workbook being used for forked evaluation. Most operations are delegated to the
  * shared master workbook, except those that potentially involve cell values that may have been
  * updated after a call to {@link #getOrCreateUpdatableCell(String, int, int)}.<br>
- * 
+ *
  * For POI internal use only
  */
 @Internal
@@ -117,7 +117,7 @@ final class ForkedEvaluationWorkbook implements EvaluationWorkbook {
     public EvaluationSheet getSheet(int sheetIndex) {
         return getSharedSheet(getSheetName(sheetIndex));
     }
-    
+
     @Override
     public ExternalName getExternalName(int externSheetIndex, int externNameIndex) {
        return _masterBook.getExternalName(externSheetIndex, externNameIndex);
@@ -155,15 +155,16 @@ final class ForkedEvaluationWorkbook implements EvaluationWorkbook {
     public UDFFinder getUDFFinder() {
         return _masterBook.getUDFFinder();
     }
-    
+
+    @Override
     public SpreadsheetVersion getSpreadsheetVersion() {
         return _masterBook.getSpreadsheetVersion();
     }
-    
+
     /* (non-Javadoc)
      * leave the map alone, if it needs resetting, reusing this class is probably a bad idea.
      * @see org.apache.poi.ss.formula.EvaluationSheet#clearAllCachedResultValues()
-     * 
+     *
      * @since POI 3.15 beta 3
      */
     @Override

poi/src/main/java/org/apache/poi/ss/formula/functions/ArrayFunction.java

@@ -48,7 +48,7 @@ public interface ArrayFunction {
      * @param arg0 the first function argument. Empty values are represented with
      *        {@link BlankEval} or {@link MissingArgEval}, never {@code null}
      * @param arg1 the first function argument. Empty values are represented with
-     *      @link BlankEval} or {@link MissingArgEval}, never {@code null}
+     *      {@link BlankEval} or {@link MissingArgEval}, never {@code null}
      *
      * @param srcRowIndex row index of the cell containing the formula under evaluation
      * @param srcColumnIndex column index of the cell containing the formula under evaluation

poi/src/main/java/org/apache/poi/ss/formula/functions/Countblank.java

@@ -29,7 +29,6 @@ import org.apache.poi.ss.formula.functions.CountUtils.I_MatchPredicate;
  *        <caption>Parameter descriptions</caption>
  *      <tr><th>range&nbsp;&nbsp;&nbsp;</th><td>is the range of cells to count blanks</td></tr>
  *    </table>
- * </p>
  */
 public final class Countblank extends Fixed1ArgFunction {
 

poi/src/main/java/org/apache/poi/ss/formula/functions/TextFunction.java

@@ -197,7 +197,7 @@ public abstract class TextFunction implements Function {
 	 * MID returns a specific number of
 	 * characters from a text string, starting at the specified position.<p>
 	 *
-	 * <b>Syntax<b>:<br> <b>MID</b>(<b>text</b>, <b>start_num</b>,
+	 * <b>Syntax</b>:<br> <b>MID</b>(<b>text</b>, <b>start_num</b>,
 	 * <b>num_chars</b>)<br>
 	 *
 	 * Author: Manda Wilson &lt; wilson at c bio dot msk cc dot org &gt;
@@ -335,7 +335,7 @@ public abstract class TextFunction implements Function {
 	 *  {@link DataFormatter} to be done, as this works much the same as the
 	 *  display focused work that that does.
 	 *
-	 * <b>Syntax<b>:<br> <b>TEXT</b>(<b>value</b>, <b>format_text</b>)<br>
+	 * <b>Syntax</b>:<br> <b>TEXT</b>(<b>value</b>, <b>format_text</b>)<br>
 	 */
 	public static final Function TEXT = new Fixed2ArgFunction() {
 

poi/src/main/java/org/apache/poi/ss/usermodel/HorizontalAlignment.java

@@ -62,7 +62,6 @@ public enum HorizontalAlignment {
      * left/right edge, don't append the additional occurrence of the value.</li>
      * <li>The display value of the cell is filled, not the underlying raw number.</li>
      * </ol>
-     * </p>
      */
     FILL,
 
@@ -92,7 +91,7 @@ public enum HorizontalAlignment {
      * <p> Two lines inside a cell are separated by a carriage return. </p>
      */
     DISTRIBUTED;
-    
+
     public short getCode() {
         return (short) ordinal();
     }

poi/src/main/java/org/apache/poi/ss/usermodel/Name.java

@@ -90,7 +90,7 @@ public interface Name {
      * <p>
      * A name must always be unique within its scope. POI prevents you from defining a name that is not unique
      * within its scope. However you can use the same name in different scopes. Example:
-     * <pre><blockquote>
+     * <pre>{@code
      * //by default names are workbook-global
      * Name name;
      * name = workbook.createName();
@@ -108,8 +108,8 @@ public interface Name {
      * name.setSheetIndex(0);
      * name.setNameName("sales_08");  //will throw an exception: "The sheet already contains this name (case-insensitive)"
      *
-     * </blockquote></pre>
-    * </p>
+     * }</pre>
+     *
      * @param name named range name to set
      * @throws IllegalArgumentException if the name is invalid or the already exists within its scope (case-insensitive)
      */
@@ -118,7 +118,7 @@ public interface Name {
     /**
      * Returns the formula that the name is defined to refer to.
      *
-     * @return the reference for this name, <code>null</code> if it has not been set yet. Never empty string
+     * @return the reference for this name, {@code null} if it has not been set yet. Never empty string
      * @see #setRefersToFormula(String)
      */
     String getRefersToFormula();
@@ -127,11 +127,11 @@ public interface Name {
      * Sets the formula that the name is defined to refer to. The following are representative examples:
      *
      * <ul>
-     *  <li><code>'My Sheet'!$A$3</code></li>
-     *  <li><code>8.3</code></li>
-     *  <li><code>HR!$A$1:$Z$345</code></li>
-     *  <li><code>SUM(Sheet1!A1,Sheet2!B2)</li>
-     *  <li><code>-PMT(Interest_Rate/12,Number_of_Payments,Loan_Amount)</li>
+     *  <li>{@code 'My Sheet'!$A$3}</li>
+     *  <li>{@code 8.3}</li>
+     *  <li>{@code HR!$A$1:$Z$345}</li>
+     *  <li>{@code SUM(Sheet1!A1,Sheet2!B2)}</li>
+     *  <li>{@code -PMT(Interest_Rate/12,Number_of_Payments,Loan_Amount)}</li>
      * </ul>
      *
      * Note: Using relative values like 'A1:B1' can lead to unexpected moving of
@@ -154,7 +154,7 @@ public interface Name {
     /**
      * Checks if this name points to a cell that no longer exists
      *
-     * @return <code>true</code> if the name refers to a deleted cell, <code>false</code> otherwise
+     * @return {@code true} if the name refers to a deleted cell, {@code false} otherwise
      */
     boolean isDeleted();
 
@@ -162,7 +162,7 @@ public interface Name {
      * Checks if this name is hidden, eg one of the built-in Excel
      *  internal names
      *
-     * @return <code>true</code> if the name is a hidden name, <code>false</code> otherwise
+     * @return {@code true} if the name is a hidden name, {@code false} otherwise
      */
     boolean isHidden();
 
@@ -172,34 +172,34 @@ public interface Name {
      * @param sheetId the sheet index this name applies to, -1 unsets this property making the name workbook-global
      * @throws IllegalArgumentException if the sheet index is invalid.
      */
-    public void setSheetIndex(int sheetId);
+    void setSheetIndex(int sheetId);
 
     /**
      * Returns the sheet index this name applies to.
      *
      * @return the sheet index this name applies to, -1 if this name applies to the entire workbook
      */
-    public int getSheetIndex();
+    int getSheetIndex();
 
     /**
      * Returns the comment the user provided when the name was created.
      *
      * @return the user comment for this named range
      */
-    public String getComment();
+    String getComment();
 
     /**
      * Sets the comment the user provided when the name was created.
      *
      * @param comment the user comment for this named range
      */
-    public void setComment(String comment);
+    void setComment(String comment);
 
     /**
      * Indicates that the defined name refers to a user-defined function.
      * This attribute is used when there is an add-in or other code project associated with the file.
      *
-     * @param value <code>true</code> indicates the name refers to a function.
+     * @param value {@code true} indicates the name refers to a function.
      */
     void setFunction(boolean value);
 }

poi/src/main/java/org/apache/poi/ss/util/AreaReference.java

@@ -385,7 +385,7 @@ public class AreaReference {
      *  Example return values:
      *    <table>
      *      <caption>Example return values</caption>
-     *      <tr><th align='left'>Result</th><th align='left'>Comment</th></tr>
+     *      <tr><th>Result</th><th>Comment</th></tr>
      *      <tr><td>A1:A1</td><td>Single cell area reference without sheet</td></tr>
      *      <tr><td>A1:$C$1</td><td>Multi-cell area reference without sheet</td></tr>
      *      <tr><td>Sheet1!A$1:B4</td><td>Standard sheet name</td></tr>

poi/src/main/java/org/apache/poi/ss/util/CellReference.java

@@ -300,8 +300,8 @@ public class CellReference implements GenericRecord {
      *
      * POI currently targets BIFF8 (Excel 97-2003), so the following behaviour can be observed for
      * this method:
-     * <blockquote><table border="0" cellpadding="1" cellspacing="0"
-     *                 summary="Notable cases.">
+     * <table>
+     *   <caption>Notable cases</caption>
      *   <tr><th>Input&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</th>
      *       <th>Result&nbsp;</th></tr>
      *   <tr><td>"A", "1"</td><td>true</td></tr>
@@ -313,7 +313,7 @@ public class CellReference implements GenericRecord {
      *   <tr><td>"AAA", "1"</td><td>false</td></tr>
      *   <tr><td>"a", "111"</td><td>true</td></tr>
      *   <tr><td>"Sheet", "1"</td><td>false</td></tr>
-     * </table></blockquote>
+     * </table>
      *
      * @param colStr a string of only letter characters
      * @param rowStr a string of only digit characters
@@ -485,7 +485,7 @@ public class CellReference implements GenericRecord {
      *  Example return values:
      *	<table>
      *	  <caption>Example return values</caption>
-     *	  <tr><th align='left'>Result</th><th align='left'>Comment</th></tr>
+     *	  <tr><th>Result</th><th>Comment</th></tr>
      *	  <tr><td>A1</td><td>Cell reference without sheet</td></tr>
      *	  <tr><td>Sheet1!A1</td><td>Standard sheet name</td></tr>
      *	  <tr><td>'O''Brien''s Sales'!A1'&nbsp;</td><td>Sheet name with special characters</td></tr>
@@ -502,8 +502,9 @@ public class CellReference implements GenericRecord {
      *
      * <p>
      *  Example return values:
-     *	<table border="0" cellpadding="1" cellspacing="0" summary="Example return values">
-     *	  <tr><th align='left'>Result</th><th align='left'>Comment</th></tr>
+     *	<table>
+     *	  <caption>Example return values</caption>
+     *	  <tr><th>Result</th><th>Comment</th></tr>
      *	  <tr><td>A1</td><td>Cell reference without sheet</td></tr>
      *	  <tr><td>Sheet1!A1</td><td>Standard sheet name</td></tr>
      *	  <tr><td>'O''Brien''s Sales'!A1'&nbsp;</td><td>Sheet name with special characters</td></tr>
@@ -583,9 +584,7 @@ public class CellReference implements GenericRecord {
                 && _colIndex == cr._colIndex
                 && _isRowAbs == cr._isRowAbs
                 && _isColAbs == cr._isColAbs
-                && ((_sheetName == null)
-                        ? (cr._sheetName == null)
-                        : _sheetName.equals(cr._sheetName));
+                && Objects.equals(_sheetName, cr._sheetName);
     }
 
     @Override