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                        Apache Commons Lang
                            Version 3.7
                           Release Notes


INTRODUCTION:

This document contains the release notes for the 3.7 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 and onwards 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.

For the advice on upgrading from 2.x to 3.x, see the following page:

    https://commons.apache.org/lang/article3_0.html

Apache Commons Lang, a package of Java utility classes for the
classes that are in java.lang's hierarchy, or are considered to be so
standard as to justify existence in java.lang.

New features and bug fixes. Requires Java 7, supports Java 8, 9, 10.

Changes in this version include:

New features:
o LANG-1355: TimeZone.getTimeZone() in FastDateParser causes resource contention (PR #296.) Thanks to Chas Honton.
o LANG-1360: Add methods to ObjectUtils to get various forms of class names in a null-safe manner Thanks to Gary Gregory.

Fixed Bugs:
o LANG-1362: Fix tests DateUtilsTest for Java 9 with en_GB locale Thanks to Stephen Colebourne.
o LANG-1365: Fix NullPointerException in isJavaVersionAtLeast on Java 10, add SystemUtils.IS_JAVA_10, add JavaVersion.JAVA_10 Thanks to Gary Gregory.
o LANG-1348: StackOverflowError on TypeUtils.toString(...) for a generic return type of Enum.valueOf Thanks to mbusso.
o LANG-1350: ConstructorUtils.invokeConstructor(Class, Object...) regression Thanks to Brett Kail.
o LANG-1349: EqualsBuilder#isRegistered: swappedPair construction bug Thanks to Naman Nigam.
o LANG-1357: org.apache.commons.lang3.time.FastDateParser should use toUpperCase(Locale) Thanks to BruceKuiLiu.

Changes:
o LANG-1358: Improve StringUtils#replace throughput Thanks to Stephane Landelle.
o LANG-1346: Remove deprecation from RandomStringUtils
o LANG-1361: ExceptionUtils.getThrowableList() is using deprecated ExceptionUtils.getCause() Thanks to Ana.


Historical list of changes: https://commons.apache.org/proper/commons-lang/changes-report.html

For complete information on Apache Commons Lang, including instructions on how to submit bug reports,
patches, or suggestions for improvement, see the Apache Commons Lang website:

https://commons.apache.org/proper/commons-lang/

=============================================================================

                           Apache Commons Lang
                               Version 3.6
                              Release Notes


INTRODUCTION:

This document contains the release notes for the 3.6 version of
Apache Commons Lang as well as a history all changes in the Commons Lang 3.x
release line. Commons Lang is a set of utility functions and reusable
components that should be of use in any Java environment. Commons Lang 3.6 at
least requires Java 7.0. Note that this has changed from Commons Lang 3.5, which
only required Java 1.6.

For the advice on upgrading from 2.x to 3.x, see the following page:

    https://commons.apache.org/lang/article3_0.html

HIGHLIGHTS
==========

Some of the highlights in this release include:

o The class org.apache.commons.lang3.concurrent.Memoizer is an implementation
    of the Memoizer pattern as shown in
    Goetz, Brian et al. (2006) - Java Concurrency in Practice, p. 108.
o The class org.apache.commons.lang3.ArchUtils has been added. ArchUtils is
    a utility class for the "os.arch" system property.

DEPRECATIONS
============

The Apache Commons Community has recently set up the Commons Text component
as a home for algorithms working on strings. For this reason most of the string
focused functionality in Commons Lang has been deprecated and moved to
Commons Text. This includes:

o All classes in the org.apache.commons.lang3.text and the
    org.apache.commons.lang3.text.translate packages
o org.apache.commons.lang3.StringEscapeUtils
o org.apache.commons.lang3.RandomStringUtils
o The methods org.apache.commons.lang3.StringUtils.getJaroWinklerDistance and
    org.apache.commons.lang3.StringUtils.getLevenshteinDistance

For more information see the Commons Text website:

    https://commons.apache.org/text

The class org.apache.commons.lang3.CharEncoding has been deprecated in favor of
java.nio.charset.StandardCharsets.

The following methods have been deprecated in
org.apache.commons.lang3.ArrayUtils in favor of the corresponding insert
methods. Note that the handling for null inputs differs between add and insert.

o add(boolean[], int, boolean) -> insert(int, boolean[], boolean...)
o add(byte[], int, boolean)    -> insert(int, byte[], byte...)
o add(char[], int, boolean)    -> insert(int, char[], char...)
o add(double[], int, boolean)  -> insert(int, double[], double...)
o add(float[], int, boolean)   -> insert(int, float[], float...)
o add(int[], int, boolean)     -> insert(int, int[], int...)
o add(long[], int, boolean)    -> insert(int, long[], long...)
o add(short[], int, boolean)   -> insert(int, short[], short...)
o add(T[], int, boolean)       -> insert(int, T[], T...)


COMPATIBILITY WITH JAVA 9
==================

The MANIFEST.MF now contains an additional entry:

  Automatic-Module-Name: org.apache.commons.lang3

This should make it possible to use Commons Lang 3.6 as a module in the Java 9
module system. For more information see the corresponding issue and the
referenced mailing list discussions:

    https://issues.apache.org/jira/browse/LANG-1338

The build problems present in the 3.5 release have been resolved. Building
Commons Lang 3.6 should work out of the box with the latest Java 9 EA build.
Please report any Java 9 related issues at:

    https://issues.apache.org/jira/browse/LANG

NEW FEATURES
============

o LANG-1336: Add NUL Byte To CharUtils. Thanks to Beluga Behr.
o LANG-1304: Add method in StringUtils to determine if string contains both
             mixed cased characters. Thanks to Andy Klimczak.
o LANG-1325: Increase test coverage of ToStringBuilder class to 100%.
             Thanks to Arshad Basha.
o LANG-1307: Add a method in StringUtils to extract only digits out of input
             string. Thanks to Arshad Basha.
o LANG-1256: Add JMH maven dependencies. Thanks to C0rWin.
o LANG-1167: Add null filter to ReflectionToStringBuilder.
             Thanks to Mark Dacek.
o LANG-1299: Add method for converting string to an array of code points.
o LANG-660:  Add methods to insert arrays into arrays at an index.
o LANG-1034: Add support for recursive comparison to
             EqualsBuilder#reflectionEquals. Thanks to Yathos UG.
o LANG-1067: Add a reflection-based variant of DiffBuilder.
o LANG-740:  Implementation of a Memoizer. Thanks to James Sawle.
o LANG-1258: Add ArrayUtils#toStringArray method.
             Thanks to IG, Grzegorz Rożniecki.
o LANG-1160: StringUtils#abbreviate should support 'custom ellipses' parameter.
o LANG-1293: Add StringUtils#isAllEmpty and #isAllBlank methods.
             Thanks to Pierre Templier, Martin Tarjanyi.
o LANG-1313: Add ArchUtils - An utility class for the "os.arch" system property.
             Thanks to Tomschi.
o LANG-1272: Add shuffle methods to ArrayUtils.
o LANG-1317: Add MethodUtils#findAnnotation and extend
             MethodUtils#getMethodsWithAnnotation for non-public, super-class
             and interface methods. Thanks to Yasser Zamani.
o LANG-1331: Add ImmutablePair.nullPair().
o LANG-1332: Add ImmutableTriple.nullTriple().

FIXED BUGS
==========

o LANG-1337: Fix test failures in IBM JDK 8 for ToStringBuilderTest.
o LANG-1319: MultilineRecursiveToStringStyle StackOverflowError when object is
             an array.
o LANG-1320: LocaleUtils#toLocale does not support language followed by UN M.49
             numeric-3 area code followed by variant.
o LANG-1300: Clarify or improve behavior of int-based indexOf methods in
             StringUtils. Thanks to Mark Dacek.
o LANG-1286: RandomStringUtils random method can overflow and return characters
             outside of specified range.
o LANG-1292: WordUtils.wrap throws StringIndexOutOfBoundsException.
o LANG-1287: RandomStringUtils#random can enter infinite loop if end parameter
             is to small. Thanks to Ivan Morozov.
o LANG-1285: NullPointerException in FastDateParser$TimeZoneStrategy.
             Thanks to Francesco Chicchiriccò.
o LANG-1281: Javadoc of StringUtils.ordinalIndexOf is contradictory.
             Thanks to Andreas Lundblad.
o LANG-1188: StringUtils#join(T...): warning: [unchecked] Possible heap
             pollution from parameterized vararg type T.
o LANG-1144: Multiple calls of
             org.apache.commons.lang3.concurrent.LazyInitializer.initialize()
             are possible. Thanks to Waldemar Maier, Gary Gregory.
o LANG-1276: StrBuilder#replaceAll ArrayIndexOutOfBoundsException.
             Thanks to Andy Klimczak.
o LANG-1278: BooleanUtils javadoc issues. Thanks to Duke Yin.
o LANG-1070: ArrayUtils#add confusing example in javadoc.
             Thanks to Paul Pogonyshev.
o LANG-1271: StringUtils#isAnyEmpty and #isAnyBlank should return false for an
             empty array. Thanks to Pierre Templier.
o LANG-1155: Add StringUtils#unwrap. Thanks to Saif Asif, Thiago Andrade.
o LANG-1311: TypeUtils.toString() doesn't handle primitive and Object arrays
             correctly. Thanks to Aaron Digulla.
o LANG-1312: LocaleUtils#toLocale does not support language followed by UN M.49
             numeric-3 area code.
o LANG-1265: Build failures when building with Java 9 EA.
o LANG-1314: javadoc creation broken with Java 8. Thanks to Allon Murienik.
o LANG-1310: MethodUtils.invokeMethod throws ArrayStoreException if using
             varargs arguments and smaller types than the method defines.
             Thanks to Don Jeba.

CHANGES
=======

o LANG-1338: Add Automatic-Module-Name MANIFEST entry for Java 9
             compatibility.
o LANG-1334: Deprecate CharEncoding in favour of
             java.nio.charset.StandardCharsets.
o LANG-1110: Implement HashSetvBitSetTest using JMH.
             Thanks to Bruno P. Kinoshita.
o LANG-1290: Increase test coverage of org.apache.commons.lang3.ArrayUtils.
             Thanks to Andrii Abramov.
o LANG-1274: StrSubstitutor should state its thread safety.
o LANG-1277: StringUtils#getLevenshteinDistance reduce memory consumption.
             Thanks to yufcuy.
o LANG-1279: Update Java requirement from Java 6 to 7.
o LANG-1143: StringUtils should use toXxxxCase(int) rather than
             toXxxxCase(char). Thanks to sebb.
o LANG-1297: Add SystemUtils.getHostName() API.
o LANG-1301: Moving apache-rat-plugin configuration into pluginManagement.
             Thanks to Karl Heinz Marbaise.
o LANG-1316: Deprecate classes/methods moved to commons-text.

=============================================================================

                        Release Notes for version 3.5


HIGHLIGHTS
==========

Some of the highlights in this release include:

o Added Java 9 detection to org.apache.commons.lang3.SystemUtils.
o Support for shifting and swapping elements in
    org.apache.commons.lang3.ArrayUtils.
o New methods for generating random strings from different character classes
    including alphabetic, alpha-numeric and ASCII added to
    org.apache.commons.lang3.RandomStringUtils.
o Numerous extensions to org.apache.commons.lang3.StringUtils including
    null safe compare variants, more remove and replace variants, rotation and
    truncation.
o Added org.apache.commons.lang3.ThreadUtils - a utility class to work with
    instances of java.lang.Thread and java.lang.ThreadGroup.
o Added annotations @EqualsExclude, @HashCodeExclude and @ToStringExclude to
    mark fields which should be ignored by the reflective builders in the
    org.apache.commons.lang3.builder package.
o Support for various modify and retrieve value use cases added to the classes
    in org.apache.commons.lang3.mutable.

COMPATIBILITY
=============

Apache Commons Lang 3.5 is binary compatible with the 3.4 release. Users
should not experience any problems when upgrading from 3.4 to 3.5.

There has been an addition to the org.apache.commons.lang3.time.DatePrinter
interface:

o Added method 'public boolean parse(java.lang.String, java.text.ParsePosition,
    java.util.Calendar)'
o Added method 'public java.lang.Appendable format(long, java.lang.Appendable)'
o Added method 'public java.lang.Appendable format(java.util.Date,
    java.lang.Appendable)'
o Added method 'public java.lang.Appendable format(java.util.Calendar,
    java.lang.Appendable)'

For this reason 3.5 is not strictly source compatible to 3.4. Since the
DatePrinter interface is not meant to be implemented by clients, this
change it not considered to cause any problems.

JAVA 9 SUPPORT
==============

Java 9 introduces a new version-string scheme. Details of this new scheme are
documented in JEP-223 (https://openjdk.org/jeps/223). In order to support
JEP-223 two classes had to be changed:

o org.apache.commons.lang3.JavaVersion
    deprecated enum constant JAVA_1_9
    introduced enum constant JAVA_9

o org.apache.commons.lang3.SystemUtils
    deprecated constant IS_JAVA_1_9
    introduced constant IS_JAVA_9

For more information see LANG-1197
(https://issues.apache.org/jira/browse/LANG-1197). All other APIs are expected
to work with Java 9.

BUILDING ON JAVA 9
==================

Java 8 introduced the Unicode Consortium's Common Locale Data Repository as
alternative source for locale data. Java 9 will use the CLDR provider as
default provider for locale data (see https://openjdk.org/jeps/252). This
causes an number of locale-sensitive test in Commons Lang to fail. In order
to build Commons Lang 3.5 on Java 9, the locale provider has to be set to
'JRE':

    mvn -Djava.locale.providers=JRE clean install

We are currently investigating ways to support building on Java 9 without
further configuration. For more information see:
https://issues.apache.org/jira/browse/LANG-1265


NEW FEATURES
==============

o LANG-1275: Added a tryAcquire() method to TimedSemaphore.
o LANG-1255: Add DateUtils.toCalendar(Date, TimeZone). Thanks to Kaiyuan Wang.
o LANG-1023: Add WordUtils.wrap overload with customizable breakable character.
             Thanks to Marko Bekhta.
o LANG-787:  Add method removeIgnoreCase(String, String) to StringUtils. Thanks
             to Gokul Nanthakumar C.
o LANG-1224: Extend RandomStringUtils with methods that generate strings
             between a min and max length. Thanks to Caleb Cushing.
o LANG-1257: Add APIs StringUtils.wrapIfMissing(String, char|String). Thanks to
             Gary Gregory.
o LANG-1253: Add RandomUtils#nextBoolean() method. Thanks to adilek.
o LANG-1085: Add a circuit breaker implementation. Thanks to Oliver Heger and
             Bruno P. Kinoshita.
o LANG-1013: Add StringUtils.truncate(). Thanks to Thiago Andrade.
o LANG-1195: Enhance MethodUtils to allow invocation of private methods. Thanks
             to Derek C. Ashmore.
o LANG-1189: Add getAndIncrement/getAndDecrement/getAndAdd/incrementAndGet/
             decrementAndGet/addAndGet in Mutable* classes. Thanks to
             Haiyang Li and Matthew Bartenschlag.
o LANG-1225: Add RandomStringUtils#randomGraph and #randomPrint which match
             corresponding regular expression class. Thanks to Caleb Cushing.
o LANG-1223: Add StopWatch#getTime(TimeUnit). Thanks to Nick Manley.
o LANG-781:  Add methods to ObjectUtils class to check for null elements in the
             array. Thanks to Krzysztof Wolny.
o LANG-1228: Prefer Throwable.getCause() in ExceptionUtils.getCause().
             Thanks to Brad Hess.
o LANG-1233: DiffBuilder add method to allow appending from a DiffResult.
             Thanks to Nick Manley.
o LANG-1168: Add SystemUtils.IS_OS_WINDOWS_10 property.
             Thanks to Pascal Schumacher.
o LANG-1115: Add support for varargs in ConstructorUtils, MemberUtils, and
             MethodUtils. Thanks to Jim Lloyd and Joe Ferner.
o LANG-1134: Add methods to check numbers against NaN and infinite to
             Validate. Thanks to Alan Smithee.
o LANG-1220: Add tests for missed branches in DateUtils.
             Thanks to Casey Scarborough.
o LANG-1146: z/OS identification in SystemUtils.
             Thanks to Gabor Liptak.
o LANG-1192: FastDateFormat support of the week-year component (uppercase 'Y').
             Thanks to Dominik Stadler.
o LANG-1169: Add StringUtils methods to compare a string to multiple strings.
             Thanks to Rafal Glowinski, Robert Parr and Arman Sharif.
o LANG-1185: Add remove by regular expression methods in StringUtils.
o LANG-1139: Add replace by regular expression methods in StringUtils.
o LANG-1171: Add compare methods in StringUtils.
o LANG-1174: Add sugar to RandomUtils. Thanks to Punkratz312.
o LANG-1154: FastDateFormat APIs that use a StringBuilder. Thanks to
             Gary Gregory.
o LANG-1149: Ability to throw checked exceptions without declaring them. Thanks
             to Gregory Zak.
o LANG-1153: Implement ParsePosition api for FastDateParser.
o LANG-1137: Add check for duplicate event listener in EventListenerSupport.
             Thanks to Matthew Aguirre.
o LANG-1135: Add method containsAllWords to WordUtils. Thanks to
             Eduardo Martins.
o LANG-1132: ReflectionToStringBuilder doesn't throw IllegalArgumentException
             when the constructor's object param is null. Thanks to Jack Tan.
o LANG-701:  StringUtils join with var args. Thanks to James Sawle.
o LANG-1105: Add ThreadUtils - A utility class which provides helper methods
             related to java.lang.Thread  Issue: LANG-1105. Thanks to
             Hendrik Saly.
o LANG-1031: Add annotations to exclude fields from ReflectionEqualsBuilder,
             ReflectionToStringBuilder and ReflectionHashCodeBuilder. Thanks
             to Felipe Adorno.
o LANG-1127: Use JUnit rules to set and reset the default Locale and TimeZone.
o LANG-1119: Add rotate(string, int) method to StringUtils. Thanks to
             Loic Guibert.
o LANG-1099: Add swap and shift operations for arrays to ArrayUtils. Thanks to
             Adrian Ber.
o LANG-1050: Change nullToEmpty methods to generics. Thanks to James Sawle.
o LANG-1074: Add a method to ArrayUtils for removing all occurrences of a given
             element  Issue: LANG-1074. Thanks to Haiyang Li.

FIXED BUGS
============

o LANG-1261: ArrayUtils.contains returns false for instances of subtypes.
o LANG-1252: Rename NumberUtils.isNumber, isCreatable to better reflect
             createNumber. Also, accommodated for "+" symbol as prefix in
             isCreatable and isNumber. Thanks to Rob Tompkins.
o LANG-1230: Remove unnecessary synchronization from registry lookup in
             EqualsBuilder and HashCodeBuilder. Thanks to Philippe Marschall.
o LANG-1214: Handle "void" in ClassUtils.getClass(). Thanks to Henry Tung.
o LANG-1250: SerializationUtils#deserialize has unnecessary code and a comment
             for that. Thanks to Glease Wang.
o LANG-1190: TypeUtils.isAssignable throws NullPointerException when fromType
             has type variables and toType generic superclass specifies type
             variable. Thanks to Pascal Schumacher.
o LANG-1226: StringUtils#normalizeSpace does not trim the string anymore.
             Thanks to Pascal Schumacher.
o LANG-1251: SerializationUtils.ClassLoaderAwareObjectInputStream should use
             static initializer to initialize primitiveTypes map. Thanks to
             Takuya Ueshin.
o LANG-1248: FastDatePrinter Memory allocation regression. Thanks to
             Benoit Wiart.
o LANG-1018: Fix precision loss on NumberUtils.createNumber(String). Thanks to
             Nick Manley.
o LANG-1199: Fix implementation of StringUtils.getJaroWinklerDistance(). Thanks
             to M. Steiger.
o LANG-1244: Fix dead links in StringUtils.getLevenshteinDistance() javadoc.
             Thanks to jjbankert.
o LANG-1242: "\u2284":"?" mapping missing from
             EntityArrays#HTML40_EXTENDED_ESCAPE. Thanks to Neal Stewart.
o LANG-901:  StringUtils#startsWithAny/endsWithAny is case sensitive -
             documented as case insensitive. Thanks to Matthew Bartenschlag.
o LANG-1232: DiffBuilder: Add null check on fieldName when appending Object or
             Object[]. Thanks to Nick Manley.
o LANG-1178: ArrayUtils.removeAll(Object array, int... indices) should do the
             clone, not its callers. Thanks to Henri Yandell.
o LANG-1120: StringUtils.stripAccents should remove accents from "Ł" and "ł".
             Thanks to kaching88.
o LANG-1205: NumberUtils.createNumber() behaves inconsistently with
             NumberUtils.isNumber(). Thanks to pbrose.
o LANG-1222: Fix for incorrect comment on StringUtils.containsIgnoreCase
             method. Thanks to Adam J.
o LANG-1221: Fix typo on appendIfMissing javadoc. Thanks to Pierre Templier.
o LANG-1202: parseDateStrictly doesn't pass specified locale. Thanks to
             Markus Jelsma.
o LANG-1219: FastDateFormat doesn't respect summer daylight in some localized
             strings. Thanks to Jarek.
o LANG-1175: Remove Ant-based build.
o LANG-1194: Limit max heap memory for consistent Travis CI build.
o LANG-1186: Fix NullPointerException in FastDateParser$TimeZoneStrategy.
             Thanks to NickManley.
o LANG-1193: ordinalIndexOf("abc", "ab", 1) gives incorrect answer of -1
             (correct answer should be 0); revert fix for LANG-1077. Thanks to
             Qin Li.
o LANG-1002: Several predefined ISO FastDateFormats in DateFormatUtils are
             incorrect. Thanks to Michael Osipov.
o LANG-1152: StringIndexOutOfBoundsException or field over-write for large year
             fields in FastDateParser. Thanks to Pas Filip.
o LANG-1141: StrLookup.systemPropertiesLookup() no longer reacts on changes on
             system properties.
o LANG-1147: EnumUtils *BitVector issue with more than 32 values Enum. Thanks
             to Loic Guibert.
o LANG-1059: Capitalize javadoc is incorrect. Thanks to Colin Casey.
o LANG-1122: Inconsistent behavior of swap for malformed inputs. Thanks to
             Adrian Ber.
o LANG-1130: Fix critical issues reported by SonarQube.
o LANG-1131: StrBuilder.equals(StrBuilder) doesn't check for null inputs.
o LANG-1128: JsonToStringStyle doesn't handle chars and objects correctly.
             Thanks to Jack Tan.
o LANG-1126: DateFormatUtilsTest.testSMTP depends on the default Locale.
o LANG-1123: Unit test FastDatePrinterTimeZonesTest needs a timezone set.
             Thanks to Christian P. Momon.
o LANG-916:  DateFormatUtils.format does not correctly change Calendar
             TimeZone in certain situations. Thanks to Christian P. Momon.
o LANG-1116: DateUtilsTest.testLang530 fails for some timezones. Thanks to
             Aaron Sheldon.
o LANG-1114: TypeUtils.ParameterizedType#equals doesn't work with wildcard
             types. Thanks to Andy Coates.
o LANG-1118: StringUtils.repeat('z', -1) throws NegativeArraySizeException.
             Thanks to Loic Guibert.
o LANG-1111: Fix FindBugs warnings in DurationFormatUtils.
o LANG-1162: StringUtils#equals fails with Index OOBE on non-Strings with
             identical leading prefix..
o LANG-1163: There are no tests for CharSequenceUtils.regionMatches.
o LANG-1200: Fix Javadoc of StringUtils.ordinalIndexOf. Thanks to BarkZhang.
o LANG-1191: Incorrect Javadoc
             StringUtils.containsAny(CharSequence, CharSequence...). Thanks to
             qed, Brent Worden and Gary Gregory.

CHANGES
=========
o LANG-1197: Prepare Java 9 detection.
o LANG-1262: CompareToBuilder.append(Object, Object, Comparator) method is too
             big to be inlined. Thanks to Ruslan Cheremin.
o LANG-1259: Javadoc for ArrayUtils.isNotEmpty() is slightly misleading. Thanks
             to Dominik Stadler.
o LANG-1247: FastDatePrinter generates extra Date objects. Thanks to
             Benoit Wiart.
o LANG-1229: HashCodeBuilder.append(Object,Object) is too big to be inlined,
             which prevents whole builder to be scalarized. Thanks to
             Ruslan Cheremin.
o LANG-1243: Simplify ArrayUtils removeElements by using new decrementAndGet()
             method.
o LANG-1240: Optimize BitField constructor implementation. Thanks to zhanhb.
o LANG-1206: Improve CharSetUtils.squeeze() performance. Thanks to
             Mohammed Alfallaj.
o LANG-1176: Improve ArrayUtils removeElements time complexity to O(n). Thanks
             to Jeffery Yuan.
o LANG-1234: getLevenshteinDistance with a threshold: optimize implementation
             if the strings lengths differ more than the threshold. Thanks to
             Jonatan Jönsson.
o LANG-1151: Performance improvements for NumberUtils.isParsable. Thanks to
             Juan Pablo Santos Rodríguez.
o LANG-1218: EqualsBuilder.append(Object,Object) is too big to be inlined,
             which prevents whole builder to be scalarized. Thanks to
             Ruslan Cheremin.
o LANG-1210: StringUtils#startsWithAny has error in Javadoc. Thanks to
             Matthias Niehoff.
o LANG-1208: StrSubstitutor can preserve escapes. Thanks to Samuel Karp.
o LANG-1182: Clarify Javadoc of StringUtils.containsAny(). Thanks to
             Larry West and Pascal Schumacher.
o LANG-1183: Making replacePattern/removePattern methods null safe in
             StringUtils.
o LANG-1057: Replace StringBuilder with String concatenation for better
             optimization. Thanks to Otávio Santana.
o LANG-1075: Deprecate SystemUtils.FILE_SEPARATOR and
             SystemUtils.PATH_SEPARATOR.
o LANG-979:  TypeUtils.parameterizeWithOwner - wrong format descriptor for
             "invalid number of type parameters". Thanks to Bruno P. Kinoshita.
o LANG-1112: MultilineRecursiveToStringStyle largely unusable due to being
             package-private.
o LANG-1058: StringUtils.uncapitalize performance improvement. Thanks to
             Leo Wang.
o LANG-1069: CharSet.getInstance documentation does not clearly explain how
             to include negation character in set. Thanks to Arno Noordover.
o LANG-1107: Fix parsing edge cases in FastDateParser.
o LANG-1273: Added new property IS_OS_MAC_OSX_EL_CAPITAN in SystemUtils. Thanks
             to Jake Wang.

=============================================================================

                        Release Notes for version 3.4


COMPATIBILITY
=============

Commons Lang 3.4 is fully binary compatible to the last release and can
therefore be used as a drop in replacement for 3.3.2. Note that the value of
org.apache.commons.lang3.time.DurationFormatUtils.ISO_EXTENDED_FORMAT_PATTERN
has changed, which may affect clients using the constant. Furthermore the
constant is used internally in
o DurationFormatUtils.formatDurationISO(long)
o DurationFormatUtils.formatPeriodISO(long, long)

For more information see https://issues.apache.org/jira/browse/LANG-1000.

NEW FEATURES
==============

o LANG-821:  Support OS X versions in SystemUtils. Thanks to Timo Kockert.
o LANG-1103: Add SystemUtils.IS_JAVA_1_9
o LANG-1093: Add ClassUtils.getAbbreviatedName(). Thanks to Fabian Lange.
o LANG-1082: Add option to disable the "objectsTriviallyEqual" test in
             DiffBuilder. Thanks to Jonathan Baker.
o LANG-1015: Add JsonToStringStyle implementation to ToStringStyle. Thanks to
             Thiago Andrade.
o LANG-1080: Add NoClassNameToStringStyle implementation of ToStringStyle.
             Thanks to Innokenty Shuvalov.
o LANG-883:  Add StringUtils.containsAny(CharSequence, CharSequence...) method.
             Thanks to Daniel Stewart.
o LANG-1052: Multiline recursive to string style. Thanks to Jan Matèrne.
o LANG-536:  Add isSorted() to ArrayUtils. Thanks to James Sawle.
o LANG-1033: Add StringUtils.countMatches(CharSequence, char)
o LANG-1021: Provide methods to retrieve all fields/methods annotated with a
             specific type. Thanks to Alexander Müller.
o LANG-1016: NumberUtils#isParsable method(s). Thanks to
             Juan Pablo Santos Rodríguez.
o LANG-999:  Add fuzzy String matching logic to StringUtils. Thanks to
             Ben Ripkens.
o LANG-994:  Add zero copy read method to StrBuilder. Thanks to
             Mikhail Mazursky.
o LANG-993:  Add zero copy write method to StrBuilder. Thanks to
             Mikhail Mazursky.
o LANG-1044: Add method MethodUtils.invokeExactMethod(Object, String)
o LANG-1045: Add method MethodUtils.invokeMethod(Object, String)

FIXED BUGS
============

o LANG-794:  SystemUtils.IS_OS_WINDOWS_2008, VISTA are incorrect. Thanks to
             Timo Kockert.
o LANG-1104: Parse test fails for TimeZone America/Sao_Paulo
o LANG-948:  Exception while using ExtendedMessageFormat and escaping braces.
             Thanks to Andrey Khobnya.
o LANG-1092: Wrong formatting of time zones with daylight saving time in
             FastDatePrinter
o LANG-1090: FastDateParser does not set error indication in ParsePosition
o LANG-1089: FastDateParser does not handle excess hours as per
             SimpleDateFormat
o LANG-1061: FastDateParser error - timezones not handled correctly. Thanks to
             dmeneses.
o LANG-1087: NumberUtils#createNumber() returns positive BigDecimal when
             negative Float is expected. Thanks to Renat Zhilkibaev.
o LANG-1081: DiffBuilder.append(String, Object left, Object right) does not do
             a left.equals(right) check. Thanks to Jonathan Baker.
o LANG-1055: StrSubstitutor.replaceSystemProperties does not work consistently.
             Thanks to Jonathan Baker.
o LANG-1083: Add (T) casts to get unit tests to pass in old JDK. Thanks to
             Jonathan Baker.
o LANG-1073: Read wrong component type of array in add in ArrayUtils.
             Thanks to haiyang li.
o LANG-1077: StringUtils.ordinalIndexOf("aaaaaa", "aa", 2) != 3 in StringUtils.
             Thanks to haiyang li.
o LANG-1072: Duplicated "0x" check in createBigInteger in NumberUtils. Thanks
             to haiyang li.
o LANG-1064: StringUtils.abbreviate description doesn't agree with the
             examples. Thanks to B.J. Herbison.
o LANG-1041: Fix MethodUtilsTest so it does not depend on JDK method ordering.
             Thanks to Alexandre Bartel.
o LANG-1000: ParseException when trying to parse UTC dates with Z as zone
             designator using DateFormatUtils.ISO_DATETIME_TIME_ZONE_FORMAT
o LANG-1035: Javadoc for EqualsBuilder.reflectionEquals() is unclear
o LANG-1001: ISO 8601 misspelled throughout the Javadocs. Thanks to
             Michael Osipov.
o LANG-1088: FastDateParser should be case insensitive
o LANG-995:  Fix bug with stripping spaces on last line in WordUtils.wrap().
             Thanks to Andrey Khobnya.

CHANGES
=========

o LANG-1102: Make logic for comparing OS versions in SystemUtils smarter
o LANG-1091: Shutdown thread pools in test cases. Thanks to Fabian Lange.
o LANG-1101: FastDateParser and FastDatePrinter support 'X' format
o LANG-1100: Avoid memory allocation when using date formatting to StringBuffer.
             Thanks to mbracher.
o LANG-935:  Possible performance improvement on string escape functions.
             Thanks to Fabian Lange, Thomas Neidhart.
o LANG-1098: Avoid String allocation in StrBuilder.append(CharSequence). Thanks
             to Mikhail Mazurskiy, Fabian Lange.
o LANG-1098: Update maven-checkstyle-plugin to 2.14. Thanks to Micha? Kordas.
o LANG-1097: Update org.easymock:easymock to 3.3.1. Thanks to Micha? Kordas.
o LANG-1096: Update maven-pmd-plugin to 3.4. Thanks to Micha? Kordas.
o LANG-1095: Update maven-antrun-plugin to 1.8. Thanks to Micha? Kordas.
o LANG-877:  Performance improvements for StringEscapeUtils. Thanks to
             Fabian Lange.
o LANG-1071: Fix wrong examples in Javadoc of
             StringUtils.replaceEachRepeatedly(...),
             StringUtils.replaceEach(...) Thanks to Arno Noordover.
o LANG-827:  CompareToBuilder's doc doesn't specify precedence of fields it
             uses in performing comparisons
o LANG-1020: Improve performance of normalize space. Thanks to Libor Ondrusek.
o LANG-1027: org.apache.commons.lang3.SystemUtils#isJavaVersionAtLeast should
             return true by default
o LANG-1026: Bring static method references in StringUtils to consistent style.
             Thanks to Alex Yursha.
o LANG-1017: Use non-ASCII digits in Javadoc examples for
             StringUtils.isNumeric. Thanks to Christoph Schneegans.
o LANG-1008: Change min/max methods in NumberUtils/IEEE754rUtils from array
             input parameters to varargs. Thanks to Thiago Andrade.
o LANG-1006: Add wrap (with String or char) to StringUtils. Thanks to
             Thiago Andrade.
o LANG-1005: Extend DurationFormatUtils#formatDurationISO default pattern to
             match #formatDurationHMS. Thanks to Michael Osipov.
o LANG-1007: Fixing NumberUtils JAVADoc comments for max methods. Thanks to
             Thiago Andrade.
o LANG-731:  Better Javadoc for BitField class
o LANG-1004: DurationFormatUtils#formatDurationHMS implementation does not
             correspond to Javadoc and vice versa. Thanks to Michael Osipov.
o LANG-1003: DurationFormatUtils are not able to handle negative
             durations/periods
o LANG-998:  Javadoc is not clear on preferred pattern to instantiate
             FastDateParser / FastDatePrinter

=============================================================================

                        Release Notes for version 3.3.2

NEW FEATURES
==============

o LANG-989:  Add org.apache.commons.lang3.SystemUtils.IS_JAVA_1_8

FIXED BUGS
============

o LANG-992:  NumberUtils#isNumber() returns false for "0.0", "0.4790", et al

=============================================================================

                        Release Notes for version 3.3.1

FIXED BUGS
============

o LANG-987:  DateUtils.getFragmentInDays(Date, Calendar.MONTH) returns wrong
             days
o LANG-983:  DurationFormatUtils does not describe format string fully
o LANG-981:  DurationFormatUtils#lexx does not detect unmatched quote char
o LANG-984:  DurationFormatUtils does not handle large durations correctly
o LANG-982:  DurationFormatUtils.formatDuration(61999, "s.SSSS") - ms field
             size should be 4 digits
o LANG-978:  Failing tests with Java 8 b128

=============================================================================

                        Release Notes for version 3.3

NEW FEATURES
==============

o LANG-955:  Add methods for removing all invalid characters according to
             XML 1.0 and XML 1.1 in an input string to StringEscapeUtils.
             Thanks to Adam Hooper.
o LANG-970:  Add APIs MutableBoolean setTrue() and setFalse()
o LANG-962:  Add SerializationUtils.roundtrip(T extends Serializable) to
             serialize then deserialize
o LANG-637:  There should be a DifferenceBuilder with a
             ReflectionDifferenceBuilder implementation
o LANG-944:  Add the Jaro-Winkler string distance algorithm to StringUtils.
             Thanks to Rekha Joshi.
o LANG-417:  New class ClassPathUtils with methods for turning FQN into
             resource path
o LANG-834:  Validate: add inclusiveBetween and exclusiveBetween overloads
             for primitive types
o LANG-900:  New RandomUtils class. Thanks to Duncan Jones.
o LANG-966:  Add IBM OS/400 detection

FIXED BUGS
============

o LANG-621:  ReflectionToStringBuilder.toString does not debug 3rd party object
             fields within 3rd party object. Thanks to Philip Hodges,
             Thomas Neidhart.
o LANG-977:  NumericEntityEscaper incorrectly encodes supplementary characters.
             Thanks to Chris Karcher.
o LANG-973:  Make some private fields final
o LANG-971:  NumberUtils#isNumber(String) fails to reject invalid Octal numbers
o LANG-972:  NumberUtils#isNumber does not allow for hex 0XABCD
o LANG-969:  StringUtils.toEncodedString(byte[], Charset) needlessly throws
             UnsupportedEncodingException. Thanks to Matt Bishop.
o LANG-946:  ConstantInitializerTest fails when building with IBM JDK 7
o LANG-954:  uncaught PatternSyntaxException in FastDateFormat on Android.
             Thanks to Michael Keppler.
o LANG-936:  StringUtils.getLevenshteinDistance with too big of a threshold
             returns wrong result. Thanks to Yaniv Kunda, Eli Lindsey.
o LANG-943:  Test DurationFormatUtilsTest.testEdgeDuration fails in
             JDK 1.6, 1.7 and 1.8, BRST time zone
o LANG-613:  ConstructorUtils.getAccessibleConstructor() Does Not Check the
             Accessibility of Enclosing Classes
o LANG-951:  Fragments are wrong by 1 day when using fragment YEAR or MONTH.
             Thanks to Sebastian Götz.
o LANG-950:  FastDateParser does not handle two digit year parsing like
             SimpleDateFormat
o LANG-949:  FastDateParserTest.testParses does not test FastDateParser
o LANG-915:  Wrong locale handling in LocaleUtils.toLocale().
             Thanks to Sergio Fernández.

CHANGES
=========

o LANG-961:  org.apache.commons.lang3.reflect.FieldUtils.removeFinalModifier(Field)
             does not clean up after itself
o LANG-958:  FastDateParser javadoc incorrectly states that SimpleDateFormat
             is used internally
o LANG-956:  Improve Javadoc of WordUtils.wrap methods
o LANG-939:  Move Documentation from user guide to package-info files
o LANG-953:  Convert package.html files to package-info.java files
o LANG-940:  Fix deprecation warnings
o LANG-819:  EnumUtils.generateBitVector needs a "? extends"

=============================================================================

                        Release Notes for version 3.2.1

BUG FIXES
===========

o LANG-937:  Fix missing Hamcrest dependency in Ant Build
o LANG-941:  Test failure in LocaleUtilsTest when building with JDK 8
o LANG-942:  Test failure in FastDateParserTest and FastDateFormat_ParserTest
             when building with JDK8. Thanks to Bruno P. Kinoshita,
             Henri Yandell.
o LANG-938:  Build fails with test failures when building with JDK 8

=============================================================================

                        Release Notes for version 3.2

COMPATIBILITY WITH 3.1
========================

This release introduces backwards incompatible changes in
org.apache.commons.lang3.time.FastDateFormat:
o Method 'protected java.util.List parsePattern()' has been removed
o Method 'protected java.lang.String parseToken(java.lang.String, int[])' has
  been removed
o Method 'protected org.apache.commons.lang3.time.FastDateFormat$NumberRule
  selectNumberRule(int, int)' has been removed

These changes were the result of [LANG-462]. It is assumed that this change
will not break clients as Charles Honton pointed out on 25/Jan/12:
"
 1. Methods "FastDateFormat$NumberRule selectNumberRule(int, int)" and
    "List<Rule> parsePattern()" couldn't have been overridden because
    NumberRule and Rule were private to FastDateFormat.
 2. Due to the factory pattern used, it's unlikely other two methods would have
    been overridden.
 3. The four methods are highly implementation specific. I consider it a
    mistake that the methods were exposed.
"
For more information see https://issues.apache.org/jira/browse/LANG-462.

NEW FEATURES
==============

o LANG-934:  Add removeFinalModifier to FieldUtils
o LANG-863:  Method returns number of inheritance hops between parent and
             subclass. Thanks to Daneel S. Yaitskov.
o LANG-774:  Added isStarted, isSuspended and isStopped to StopWatch.
             Thanks to Erhan Bagdemir.
o LANG-848:  Added StringUtils.isBlank/isEmpty CharSequence... methods.
             Thanks to Alexander Muthmann.
o LANG-926:  Added ArrayUtils.reverse(array, from, to) methods.
o LANG-795:  StringUtils.toString(byte[], String) deprecated in favour of a new
             StringUtils.toString(byte[], CharSet). Thanks to Aaron Digulla.
o LANG-893:  StrSubstitutor now supports default values for variables.
             Thanks to Woonsan Ko.
o LANG-913:  Adding .gitignore to commons-lang. Thanks to Allon Mureinik.
o LANG-837:  Add ObjectUtils.toIdentityString methods that support
             StringBuilder, StrBuilder, and Appendable.
o LANG-886:  Added CharSetUtils.containsAny(String, String).
o LANG-797:  Added escape/unescapeJson to StringEscapeUtils.
o LANG-875:  Added appendIfMissing and prependIfMissing methods to StringUtils.
o LANG-870:  Add StringUtils.LF and StringUtils.CR values.
o LANG-873:  Add FieldUtils getAllFields() to return all the fields defined in
             the given class and super classes.
o LANG-835:  StrBuilder should support StringBuilder as an input parameter.
o LANG-857:  StringIndexOutOfBoundsException in CharSequenceTranslator.
o LANG-856:  Code refactoring in NumberUtils.
o LANG-855:  NumberUtils#createBigInteger does not allow for hex and octal
             numbers.
o LANG-854:  NumberUtils#createNumber - does not allow for hex numbers to be
             larger than Long.
o LANG-853:  StringUtils join APIs for primitives.
o LANG-841:  Add StringUtils API to call String.replaceAll in DOTALL a.k.a.
             single-line mode.
o LANG-825:  Create StrBuilder APIs similar to
             String.format(String, Object...).
o LANG-675:  Add Triple class (ternary version of Pair).
o LANG-462:  FastDateFormat supports parse methods.

BUG FIXES
===========

o LANG-932:  Spelling fixes. Thanks to Ville Skyttä.
o LANG-929:  OctalUnescaper tried to parse all of \279.
o LANG-928:  OctalUnescaper had bugs when parsing octals starting with a zero.
o LANG-905:  EqualsBuilder returned true when comparing arrays, even when the
             elements are different.
o LANG-917:  Fixed exception when combining custom and choice format in
             ExtendedMessageFormat. Thanks to Arne Burmeister.
o LANG-902:  RandomStringUtils.random javadoc was incorrectly promising letters
             and numbers would, as opposed to may, appear  Issue:. Thanks to
             Andrzej Winnicki.
o LANG-921:  BooleanUtils.xor(boolean...) produces wrong results.
o LANG-896:  BooleanUtils.toBoolean(String str) javadoc is not updated. Thanks
             to Mark Bryan Yu.
o LANG-879:  LocaleUtils test fails with new Locale "ja_JP_JP_#u-ca-japanese"
             of JDK7.
o LANG-836:  StrSubstitutor does not support StringBuilder or CharSequence.
             Thanks to Arnaud Brunet.
o LANG-693:  Method createNumber from NumberUtils doesn't work for floating
             point numbers other than Float  Issue: LANG-693. Thanks to
             Calvin Echols.
o LANG-887:  FastDateFormat does not use the locale specific cache correctly.
o LANG-754:  ClassUtils.getShortName(String) will now only do a reverse lookup
             for array types.
o LANG-881:  NumberUtils.createNumber() Javadoc says it does not work for octal
             numbers.
o LANG-865:  LocaleUtils.toLocale does not parse strings starting with an
             underscore.
o LANG-858:  StringEscapeUtils.escapeJava() and escapeEcmaScript() do not
             output the escaped surrogate pairs that are Java parsable.
o LANG-849:  FastDateFormat and FastDatePrinter generates Date objects
             wastefully.
o LANG-845:  Spelling fixes.
o LANG-844:  Fix examples contained in javadoc of StringUtils.center methods.
o LANG-832:  FastDateParser does not handle unterminated quotes correctly.
o LANG-831:  FastDateParser does not handle white-space properly.
o LANG-830:  FastDateParser could use \Q \E to quote regexes.
o LANG-828:  FastDateParser does not handle non-Gregorian calendars properly.
o LANG-826:  FastDateParser does not handle non-ASCII digits correctly.
o LANG-822:  NumberUtils#createNumber - bad behavior for leading "--".
o LANG-818:  FastDateFormat's "z" pattern does not respect timezone of Calendar
             instances passed to format().
o LANG-817:  Add org.apache.commons.lang3.SystemUtils.IS_OS_WINDOWS_8.
o LANG-813:  StringUtils.equalsIgnoreCase doesn't check string reference
             equality.
o LANG-810:  StringUtils.join() endIndex, bugged for loop.
o LANG-807:  RandomStringUtils throws confusing IAE when end <= start.
o LANG-805:  RandomStringUtils.random(count, 0, 0, false, false, universe,
             random) always throws java.lang.ArrayIndexOutOfBoundsException.
o LANG-802:  LocaleUtils - unnecessary recursive call in SyncAvoid class.
o LANG-800:  Javadoc bug in DateUtils#ceiling for Calendar and Object versions.
o LANG-788:  SerializationUtils throws ClassNotFoundException when cloning
             primitive classes.
o LANG-786:  StringUtils equals() relies on undefined behavior.
o LANG-783:  Documentation bug: StringUtils.split.
o LANG-777:  jar contains velocity template of release notes.
o LANG-776:  TypeUtilsTest contains incorrect type assignability assertion.
o LANG-775:  TypeUtils.getTypeArguments() misses type arguments for
             partially-assigned classes.
o LANG-773:  ImmutablePair doc contains nonsense text.
o LANG-772:  ClassUtils.PACKAGE_SEPARATOR Javadoc contains garbage text.
o LANG-765:  EventListenerSupport.ProxyInvocationHandler no longer defines
             serialVersionUID.
o LANG-764:  StrBuilder is now serializable.
o LANG-761:  Fix Javadoc Ant warnings.
o LANG-747:  NumberUtils does not handle Long Hex numbers.
o LANG-743:  Javadoc bug in static inner class DateIterator.

CHANGES
=========

o LANG-931:  Misleading Javadoc comment in StrBuilderReader class. Thanks
             to Christoph Schneegans.
o LANG-910:  StringUtils.normalizeSpace now handles non-breaking spaces
             (Unicode 00A0). Thanks to Timur Yarosh.
o LANG-804:  Redundant check for zero in HashCodeBuilder ctor. Thanks to
             Allon Mureinik.
o LANG-884:  Simplify FastDateFormat; eliminate boxing.
o LANG-882:  LookupTranslator now works with implementations of CharSequence
             other than String.
o LANG-846:  Provide CharSequenceUtils.regionMatches with a proper green
             implementation instead of inefficiently converting to Strings.
o LANG-839:  ArrayUtils removeElements methods use unnecessary HashSet.
o LANG-838:  ArrayUtils removeElements methods clone temporary index arrays
             unnecessarily.
o LANG-799:  DateUtils#parseDate uses default locale; add Locale support.
o LANG-798:  Use generics in SerializationUtils.

CHANGES WITHOUT TICKET
========================

o Fixed URLs in javadoc to point to new oracle.com pages

=============================================================================

                        Release Notes for version 3.1

NEW FEATURES
==============

o LANG-801:  Add Conversion utility to convert between data types on byte level
o LANG-760:  Add API StringUtils.toString(byte[] input, String charsetName)
o LANG-756:  Add APIs ClassUtils.isPrimitiveWrapper(Class<?>) and
             isPrimitiveOrWrapper(Class<?>)
o LANG-695:  SystemUtils.IS_OS_UNIX doesn't recognize FreeBSD as a Unix system

BUG FIXES
===========

o LANG-749:  Incorrect Bundle-SymbolicName in Manifest
o LANG-746:  NumberUtils does not handle upper-case hex: 0X and -0X
o LANG-744:  StringUtils throws java.security.AccessControlException on Google
             App Engine
o LANG-741:  Ant build has wrong component.name
o LANG-698:  Document that the Mutable numbers don't work as expected with
             String.format

CHANGES
=========

o LANG-758:  Add an example with whitespace in StringUtils.defaultIfEmpty
o LANG-752:  Fix createLong() so it behaves like createInteger()
o LANG-751:  Include the actual type in the Validate.isInstance and
             isAssignableFrom exception messages
o LANG-748:  Deprecating chomp(String, String)
o LANG-736:  CharUtils static final array CHAR_STRING is not needed to compute
             CHAR_STRING_ARRAY

=============================================================================

                        Release Notes for version 3.0

ADDITIONS
===========

o LANG-276:  MutableBigDecimal and MutableBigInteger.
o LANG-285:  Wish : method unaccent.
o LANG-358:  ObjectUtils.coalesce.
o LANG-386:  LeftOf/RightOfNumber in Range convenience methods necessary.
o LANG-435:  Add ClassUtils.isAssignable() variants with autoboxing.
o LANG-444:  StringUtils.emptyToNull.
o LANG-482:  Enhance StrSubstitutor to support nested ${var-${subvr}} expansion
o LANG-482:  StrSubstitutor now supports substitution in variable names.
o LANG-496:  A generic implementation of the Lazy initialization pattern.
o LANG-497:  Addition of ContextedException and ContextedRuntimeException.
o LANG-498:  Add StringEscapeUtils.escapeText() methods.
o LANG-499:  Add support for the handling of ExecutionExceptions.
o LANG-501:  Add support for background initialization.
o LANG-529:  Add a concurrent package.
o LANG-533:  Validate: support for validating blank strings.
o LANG-537:  Add ArrayUtils.toArray to create generic arrays.
o LANG-545:  Add ability to create a Future for a constant.
o LANG-546:  Add methods to Validate to check whether the index is valid for
             the array/list/string.
o LANG-553:  Add TypeUtils class to provide utility code for working with generic
             types.
o LANG-559:  Added isAssignableFrom and isInstanceOf validation methods.
o LANG-559:  Added validState validation method.
o LANG-560:  New TimedSemaphore class.
o LANG-582:  Provide an implementation of the ThreadFactory interface.
o LANG-588:  Create a basic Pair<L, R> class.
o LANG-594:  DateUtils equal & compare functions up to most significant field.
o LANG-601:  Add Builder Interface / Update Builders to Implement It.
o LANG-609:  Support lazy initialization using atomic variables
o LANG-610:  Extend exception handling in ConcurrentUtils to runtime exceptions.
o LANG-614:  StringUtils.endsWithAny method
o LANG-640:  Add normalizeSpace to StringUtils
o LANG-644:  Provide documentation about the new concurrent package
o LANG-649:  BooleanUtils.toBooleanObject to support single character input
o LANG-651:  Add AnnotationUtils
o LANG-653:  Provide a very basic ConcurrentInitializer implementation
o LANG-655:  Add StringUtils.defaultIfBlank()
o LANG-667:  Add a Null-safe compare() method to ObjectUtils
o LANG-676:  Documented potential NPE if auto-boxing occurs for some BooleanUtils
             methods
o LANG-678:  Add support for ConcurrentMap.putIfAbsent()
o LANG-692:  Add hashCodeMulti varargs method
o LANG-697:  Add FormattableUtils class
o LANG-684:  Levenshtein Distance Within a Given Threshold

REMOVALS
==========

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

IMPROVEMENTS
==============

o LANG-290:  EnumUtils for JDK 5.0.
o LANG-336:  Finally start using generics.
o LANG-355:  StrBuilder should implement CharSequence and Appendable.
o LANG-396:  Investigate for vararg usages.
o LANG-424:  Improve Javadoc for StringUtils class.
o LANG-458:  Refactor Validate.java to eliminate code redundancy.
o LANG-479:  Document where in SVN trunk is.
o LANG-504:  bring ArrayUtils.isEmpty to the generics world.
o LANG-505:  Rewrite StringEscapeUtils.
o LANG-507:  StringEscapeUtils.unescapeJava should support \u+ notation.
o LANG-510:  Convert StringUtils API to take CharSequence.
o LANG-513:  Better EnumUtils.
o LANG-528:  Mutable classes should implement an appropriately typed Mutable
             interface.
o LANG-539:  Compile commons.lang for CDC 1.1/Foundation 1.1.
o LANG-540:  Make NumericEntityEscaper immutable.
o LANG-541:  Replace StringBuffer with StringBuilder.
o LANG-548:  Use Iterable on API instead of Collection.
o LANG-551:  Replace Range classes with generic version.
o LANG-562:  Change Maven groupId.
o LANG-563:  Change Java package name.
o LANG-570:  Do the test cases really still require main() and suite() methods?
o LANG-579:  Add new Validate methods.
o LANG-599:  ClassUtils.getClass(): Allow Dots as Inner Class Separators.
o LANG-605:  DefaultExceptionContext overwrites values in recursive situations.
o LANG-668:  Change ObjectUtils min() & max() functions to use varargs rather
             than just two parameters
o LANG-681:  Push down WordUtils to "text" sub-package.
o LANG-711:  Add includeantruntime=false to javac targets to quell warnings in
             ant 1.8.1 and better (and modest performance gain).
o LANG-713:  Increase test coverage of FieldUtils read methods and tweak
             javadoc.
o LANG-718:  build.xml Java 1.5+ updates.

BUG FIXES
===========

o LANG-11:   Depend on JDK 1.5+.
o LANG-302:  StrBuilder does not implement clone().
o LANG-339:  StringEscapeUtils.escapeHtml() escapes multibyte characters like
             Chinese, Japanese, etc.
o LANG-369:  ExceptionUtils not thread-safe.
o LANG-418:  Javadoc incorrect for StringUtils.endsWithIgnoreCase.
o LANG-428:  StringUtils.isAlpha, isAlphanumeric and isNumeric now return false
             for ""
o LANG-439:  StringEscapeUtils.escapeHTML() does not escape chars (0x00-0x20).
o LANG-448:  Lower Ascii Characters don't get encoded by Entities.java.
o LANG-468:  JDK 1.5 build/runtime failure on LANG-393 (EqualsBuilder).
o LANG-474:  Fixes for thread safety.
o LANG-478:  StopWatch does not resist to system time changes.
o LANG-480:  StringEscapeUtils.escapeHtml incorrectly converts unicode
             characters above U+00FFFF into 2 characters.
o LANG-481:  Possible race-conditions in hashCode of the range classes.
o LANG-564:  Improve StrLookup API documentation.
o LANG-568:  @SuppressWarnings("unchecked") is used too generally.
o LANG-571:  ArrayUtils.add(T[:  array, T element) can create unexpected
             ClassCastException.
o LANG-585:  exception.DefaultExceptionContext.getFormattedExceptionMessage
             catches Throwable.
o LANG-596:  StrSubstitutor should also handle the default properties of a
             java.util.Properties class
o LANG-600:  Javadoc is incorrect for public static int
             lastIndexOf(String str, String searchStr).
o LANG-602:  ContextedRuntimeException no longer an 'unchecked' exception.
o LANG-606:  EqualsBuilder causes StackOverflowException.
o LANG-608:  Some StringUtils methods should take an int character instead of
             char to use String API features.
o LANG-617:  StringEscapeUtils.escapeXML() can't process UTF-16 supplementary
             characters
o LANG-624:  SystemUtils.getJavaVersionAsFloat throws
             StringIndexOutOfBoundsException on Android runtime/Dalvik VM
o LANG-629:  Charset may not be threadsafe, because the HashSet is not synch.
o LANG-638:  NumberUtils createNumber throws a StringIndexOutOfBoundsException
             when argument containing "e" and "E" is passed in
o LANG-643:  Javadoc StringUtils.left() claims to throw on negative len, but
             doesn't
o LANG-645:  FastDateFormat.format() outputs incorrect week of year because
             locale isn't respected
o LANG-646:  StringEscapeUtils.unescapeJava doesn't handle octal escapes and
             Unicode with extra u
o LANG-656:  Example StringUtils.indexOfAnyBut("zzabyycdxx", '') = 0 incorrect
o LANG-658:  Some entities like &Ouml; are not matched properly against its
             ISO8859-1 representation
o LANG-659:  EntityArrays typo: {"\u2122", "&minus;"}, // minus sign, U+2212
             ISOtech
o LANG-66:   StringEscaper.escapeXml() escapes characters > 0x7f.
o LANG-662:  org.apache.commons.lang3.math.Fraction does not reduce
             (Integer.MIN_VALUE, 2^k)
o LANG-663:  org.apache.commons.lang3.math.Fraction does not always succeed in
             multiplyBy and divideBy
o LANG-664:  NumberUtils.isNumber(String) is not right when the String is
             "1.1L"
o LANG-672:  Doc bug in DateUtils#ceiling
o LANG-677:  DateUtils.isSameLocalTime compares using 12 hour clock and not
             24 hour
o LANG-685:  EqualsBuilder synchronizes on HashCodeBuilder.
o LANG-703:  StringUtils.join throws NPE when toString returns null for one of
             objects in collection
o LANG-710:  StringIndexOutOfBoundsException when calling unescapeHtml4("&#03")
o LANG-714:  StringUtils doc/comment spelling fixes.
o LANG-715:  CharSetUtils.squeeze() speedup.
o LANG-716:  swapCase and *capitalize speedups.


Historical list of changes: https://commons.apache.org/lang/changes-report.html

For complete information on Commons Lang, including instructions on how to
submit bug reports, patches, or suggestions for improvement, see the
Apache Commons Lang website:

https://commons.apache.org/lang/

Have fun!
-Apache Commons Lang team