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Upgrade to 3.0

For advice on upgrading Commons-Lang from version 2.5 to version 3.0 see 'What's new in 3.0?'.

INTRODUCTION:

This document contains the release notes for the 3.0 version of Apache Commons Lang.
Commons Lang is a set of utility functions and reusable components that should be of use in any 
Java environment.

Lang 3.0 now targets Java 5.0, making use of features that arrived with Java 5.0 such as generics, 
variable arguments, autoboxing, concurrency and formatted output.

ADDITIONS IN 3.0
================

    [LANG-276] MutableBigDecimal and MutableBigInteger.
    [LANG-285] Wish : method unaccent.
    [LANG-358] ObjectUtils.coalesce.
    [LANG-386] LeftOf/RightOfNumber in Range convenience methods necessary.
    [LANG-435] Add ClassUtils.isAssignable() variants with autoboxing.
    [LANG-444] StringUtils.emptyToNull.
    [LANG-482] Enhance StrSubstitutor to support nested ${var-${subvr}} expansion
    [LANG-482] StrSubstitutor now supports substitution in variable names.
    [LANG-496] A generic implementation of the Lazy initialization pattern.
    [LANG-497] Addition of ContextedException and ContextedRuntimeException.
    [LANG-498] Add StringEscapeUtils.escapeText() methods.
    [LANG-499] Add support for the handling of ExecutionExceptions.
    [LANG-501] Add support for background initialization.
    [LANG-529] Add a concurrent package.
    [LANG-533] Validate: support for validating blank strings.
    [LANG-537] Add ArrayUtils.toArray to create generic arrays.
    [LANG-545] Add ability to create a Future for a constant.
    [LANG-546] Add methods to Validate to check whether the index is valid for the array/list/string.
    [LANG-553] Add TypeUtils class to provide utility code for working with generic types.
    [LANG-559] Added isAssignableFrom and isInstanceOf validation methods.
    [LANG-559] Added validState validation method.
    [LANG-560] New TimedSemaphore class.
    [LANG-582] Provide an implementation of the ThreadFactory interface.
    [LANG-588] Create a basic Pair<L, R> class.
    [LANG-594] DateUtils equal & compare functions up to most significant field.
    [LANG-601] Add Builder Interface / Update Builders to Implement It.
    [LANG-609] Support lazy initialization using atomic variables
    [LANG-610] Extend exception handling in ConcurrentUtils to runtime exceptions.
    [LANG-614] StringUtils.endsWithAny method
    [LANG-640] Add normalizeSpace to StringUtils
    [LANG-644] Provide documentation about the new concurrent package
    [LANG-649] BooleanUtils.toBooleanObject to support single character input
    [LANG-651] Add AnnotationUtils
    [LANG-653] Provide a very basic ConcurrentInitializer implementation
    [LANG-655] Add StringUtils.defaultIfBlank()
    [LANG-667] Add a Null-safe compare() method to ObjectUtils
    [LANG-676] Documented potential NPE if auto-boxing occurs for some BooleanUtils methods
    [LANG-678] Add support for ConcurrentMap.putIfAbsent()
    [LANG-692] Add hashCodeMulti varargs method

REMOVALS IN 3.0
===============

    [LANG-438] Remove @deprecateds.
    [LANG-492] Remove code handled now by the JDK.
    [LANG-493] Remove code that does not hold enough value to remain.
    [LANG-590] Remove JDK 1.2/1.3 bug handling in StringUtils.indexOf(String, String, int).
    [LANG-673] WordUtils.abbreviate() removed
    [LANG-691] Removed DateUtils.UTC_TIME_ZONE

IMPROVEMENTS IN 3.0
===================

    [LANG-290] EnumUtils for JDK 5.0.
    [LANG-336] Finally start using generics.
    [LANG-355] StrBuilder should implement CharSequence and Appendable.
    [LANG-396] Investigate for vararg usages.
    [LANG-424] Improve Javadoc for StringUtils class.
    [LANG-458] Refactor Validate.java to eliminate code redundancy.
    [LANG-479] Document where in SVN trunk is.
    [LANG-504] bring ArrayUtils.isEmpty to the generics world.
    [LANG-505] Rewrite StringEscapeUtils.
    [LANG-507] StringEscapeUtils.unescapeJava should support \u+ notation.
    [LANG-510] Convert StringUtils API to take CharSequence.
    [LANG-513] Better EnumUtils.
    [LANG-528] Mutable classes should implement an appropriately typed Mutable interface.
    [LANG-539] Compile commons.lang for CDC 1.1/Foundation 1.1.
    [LANG-540] Make NumericEntityEscaper immutable.
    [LANG-541] Replace StringBuffer with StringBuilder.
    [LANG-548] Use Iterable on API instead of Collection.
    [LANG-551] Replace Range classes with generic version.
    [LANG-562] Change Maven groupId.
    [LANG-563] Change Java package name.
    [LANG-570] Do the test cases really still require main() and suite() methods?.
    [LANG-579] Add new Validate methods.
    [LANG-599] ClassUtils.getClass(): Allow Dots as Inner Class Separators.
    [LANG-605] DefaultExceptionContext overwrites values in recursive situations.
    [LANG-668] Change ObjectUtils min() & max() functions to use varargs rather than just two parameters
    [LANG-681] Push down WordUtils to "text" sub-package.

BUG FIXES IN 3.0
================

    [LANG-11]  Depend on JDK 1.5+.
    [LANG-302] StrBuilder does not implement clone().
    [LANG-339] StringEscapeUtils.escapeHtml() escapes multibyte characters like Chinese, Japanese, etc.
    [LANG-369] ExceptionUtils not thread-safe.
    [LANG-418] Javadoc incorrect for StringUtils.endsWithIgnoreCase.
    [LANG-428] StringUtils.isAlpha, isAlphanumeric and isNumeric now return false for ""
    [LANG-439] StringEscapeUtils.escapeHTML() does not escape chars (0x00-0x20).
    [LANG-448] Lower Ascii Characters don't get encoded by Entities.java.
    [LANG-468] JDK 1.5 build/runtime failure on LANG-393 (EqualsBuilder).
    [LANG-474] Fixes for thread safety.
    [LANG-478] StopWatch does not resist to system time changes.
    [LANG-480] StringEscapeUtils.escapeHtml incorrectly converts Unicode characters above U+00FFFF into 2 characters.
    [LANG-481] Possible race-conditions in hashCode of the range classes.
    [LANG-564] Improve StrLookup API documentation.
    [LANG-568] @SuppressWarnings("unchecked") is used too generally.
    [LANG-571] ArrayUtils.add(T[] array, T element) can create unexpected ClassCastException.
    [LANG-585] exception.DefaultExceptionContext.getFormattedExceptionMessage catches Throwable.
    [LANG-596] StrSubstitutor should also handle the default properties of a java.util.Properties class
    [LANG-600] Javadoc is incorrect for public static int lastIndexOf(String str, String searchStr).
    [LANG-602] ContextedRuntimeException no longer an 'unchecked' exception.
    [LANG-606] EqualsBuilder causes StackOverflowException.
    [LANG-608] Some StringUtils methods should take an int character instead of char to use String API features.
    [LANG-617] StringEscapeUtils.escapeXML() can't process UTF-16 supplementary characters
    [LANG-624] SystemUtils.getJavaVersionAsFloat throws StringIndexOutOfBoundsException on Android runtime/Dalvik VM
    [LANG-629] Charset may not be threadsafe, because the HashSet is not synch.
    [LANG-638] NumberUtils createNumber throws a StringIndexOutOfBoundsException when argument containing "e" and "E" is passed in
    [LANG-643] Javadoc StringUtils.left() claims to throw on negative len, but doesn't
    [LANG-645] FastDateFormat.format() outputs incorrect week of year because locale isn't respected
    [LANG-646] StringEscapeUtils.unescapeJava doesn't handle octal escapes and Unicode with extra u
    [LANG-656] Example StringUtils.indexOfAnyBut("zzabyycdxx", '') = 0 incorrect
    [LANG-658] Some Entitys like &Ouml; are not matched properly against its ISO8859-1 representation
    [LANG-659] EntityArrays typo: {"\u2122", "&minus;"}, // minus sign, U+2212 ISOtech
    [LANG-66]  StringEscaper.escapeXml() escapes characters > 0x7f.
    [LANG-662] org.apache.commons.lang3.math.Fraction does not reduce (Integer.MIN_VALUE, 2^k)
    [LANG-663] org.apache.commons.lang3.math.Fraction does not always succeed in multiplyBy and divideBy
    [LANG-664] NumberUtils.isNumber(String) is not right when the String is "1.1L"
    [LANG-672] Doc bug in DateUtils#ceiling
    [LANG-677] DateUtils.isSameLocalTime compares using 12 hour clock and not 24 hour
    [LANG-685] EqualsBuilder synchronizes on HashCodeBuilder.
    [LANG-703] StringUtils.join throws NPE when toString returns null for one of objects in collection
    [LANG-710] StringIndexOutOfBoundsException when calling unescapeHtml4("&#03")