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< title > ReadMe for ICU4J< / title >
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link="#0000ff" vlink="#800080">
< h2 > International Components for Unicode for Java (ICU4J)< / h2 >
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< h3 > Read Me for ICU4J 4.6M2< / h3 >
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< hr size = "2" width = "100%" >
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< p > < b > Release Date< / b > < br >
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Sept 29, 2010< br >
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< / p >
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< p > < b > Note:< / b > This is a development milestone release of ICU4J 4.6.
The contents of this document may not reflect the recent changes done
for ICU 4.6 development. This milestone is inteneded for those wishing
to get an early look at ICU 4.6 new features and API changes. It is not
recommended for production use.
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< / p >
< p > For the most recent release, see the < a
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href="http://www.icu-project.org/download/"> ICU4J
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download site< / a > . < / p >
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< h3 class = "doc" > Contents< / h3 >
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< ul type = "disc" >
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< li > < a href = "#introduction" > Introduction to ICU4J< / a > < / li >
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< li > < a href = "#changes" > Changes In This Release< / a > < / li >
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< li > < a href = "#license" > License Information< / a > < / li >
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< li > < a href = "#PlatformDependencies" > Platform Dependencies< / a > < / li >
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< li > < a href = "#download" > How to Download ICU4J< / a > < / li >
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< li > < a href = "#WhatContain" > The Structure and Contents of ICU4J< / a > < / li >
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< li > < a href = "#API" > Where to Get Documentation< / a > < / li >
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< li > < a href = "#HowToInstallJavac" > How to Install and Build< / a > < / li >
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< li > < a href = "#HowToModularize" > How to modularize ICU4J< / a > < / li >
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< li > < a href = "#tryingout" > Trying Out ICU4J< / a > < / li >
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< li > < a href = "#resources" > ICU4J Resource Information< / a > < / li >
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< li > < a href = "#timezone" > About ICU4J Time Zone< / a > < / li >
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< li > < a href = "#WhereToFindMore" > Where to Find More Information< / a > < / li >
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< li > < a href = "#SubmittingComments" > Submitting Comments, Requesting
Features and Reporting Bugs< / a > < / li >
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< / ul >
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< h3 class = "doc" > < a name = "introduction" > < / a > Introduction to ICU4J< / h3 >
< p > The International Components for Unicode (ICU) library provides
robust and
full-featured Unicode services on a wide variety of platforms. ICU
supports the
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most current version of the Unicode standard, including support for
supplementary characters (needed for GB 18030 repertoire support).< / p >
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< p > Java provides a strong foundation for global programs, and IBM and
the
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ICU team played a key role in providing globalization technology to
Java. But because of its long release schedule, Java cannot always keep
up with evolving standards. The ICU team continues to extend Java's
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Unicode and internationalization support, focusing on improving
performance,
keeping current with the Unicode standard, and providing richer APIs,
while
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remaining as compatible as possible with the original Java text and
internationalization API design.< / p >
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< p > ICU4J is an add-on to the regular JRE that provides:
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< / p >
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< ul >
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< li > < a
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href="http://www.icu-project.org/userguide/Collate_Intro.html">< b > Collation< / b > < / a >
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– rule-based, up-to-date Unicode Collation Algorithm (UCA) sorting order< br >
For fast multilingual string comparison; faster
and more complete than
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the J2SE implementation< / li >
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< li > < a href = "http://www.icu-project.org/userguide/strings.html" > < b > Supplementary
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Characters< / b > < / a > – String manipulation and character properties< br >
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Required for proper GB 18030 and JIS X 0213
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repertoire support< / li >
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< li > < a href = "http://www.icu-project.org/userguide/charsetDetection.html" > < b > Charset
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Detection< / b > < / a > – Recognition of various single and multibyte charsets< br >
Useful for recognizing untagged text data< / li >
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< li > < a
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href="http://www.icu-project.org/userguide/unicodeSet.html">< b > UnicodeSet< / b > < / a >
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– standard set operations optimized for sets of Unicode characters< br >
UnicodeSets can be built from string patterns
using any Unicode properties.< / li >
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< li > < a href = "http://www.icu-project.org/userguide/Transform.html" > < b > Transforms< / b > < / a >
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– a flexible mechanism for Unicode text conversions< br >
Including Full/Halfwidth conversions,
Normalization, Case conversions, Hex
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conversions, and transliterations between scripts (50+ pairs)< / li >
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< li > < a
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href="http://www.icu-project.org/userguide/normalization.html">< b > Unicode
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Normalization< / b > < / a > – NFC, NFD, NFKD, NFKC< br >
For canonical text representations, needed for
XML and the net< / li >
< li > < a
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href="http://www.icu-project.org/userguide/dateCalendar.html">< b > International
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Calendars< / b > < / a > – Arabic, Buddhist, Chinese, Hebrew, Japanese, Ethiopic, Islamic, Coptic and other calendars< br >
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Required for correct presentation of dates in
certain countries< / li >
< li > < a
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href="http://www.icu-project.org/userguide/formatNumbers.html">< b > Number
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Format
Enhancements< / b > < / a > – Scientific Notation, Spelled-out, etc.< br >
Enhancements to the normal Java number
formatting. The spell-out format is
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used for checks and similar documents< / li >
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< li > < a
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href="http://www.icu-project.org/userguide/boundaryAnalysis.html">< b > Enhanced
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Word-Break Detection< / b > < / a > – Rule-based, supports Thai< br >
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Required for correct support of Thai< / li >
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< li > < a
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href="http://www.icu-project.org/userguide/compression.html">< b > Unicode
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Text
Compression< / b > < / a > – Standard compression of Unicode text< br >
Suitable for large numbers of small fields,
where LZW and similar schemes
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do not apply< / li >
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< li > < a
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href="http://www.icu-project.org/userguide/conversion.html">< b > Charset Conversion< / b > < / a > – Conversion to and from different charsets.< br >
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Plugs into Java CharsetProvider Service Provider Interface (SPI)< / li >
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< / ul >
< blockquote >
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< p > < b > Note:< / b > We continue to provide assistance to Sun, and in some
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cases, ICU4J support has been rolled into a later release of Java. For
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example, the Thai word-break is now in Java 1.4. However, the most
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current and complete version is always found in ICU4J.< / p >
< / blockquote >
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< h3 class = "doc" > < a name = "changes" > < / a > Changes In This Release< / h3 >
< h4 > New features and other changes< / h4 >
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< p >
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See the < a href = "http://sites.google.com/site/icusite/download/45" > ICU 4.6 milestone download page< / a > about
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new features in this release. The list of API changes since the previous ICU4J release
is available
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< a href = "http://source.icu-project.org/repos/icu/icu4j/tags/milestone-4-5-2/APIChangeReport.html" > here< / a > .
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< / p >
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< h3 class = "doc" > < a name = "license" > < / a > License Information< / h3 >
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< p >
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The ICU projects (ICU4C and ICU4J) use the X license. The X
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license is < b > suitable for commercial use< / b > and is a recommended free software license
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that is compatible with the GNU GPL license. This became
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effective with release 1.8.1 of ICU4C and release 1.3.1 of ICU4J in
mid-2001. All new ICU releases will adopt the X license; previous ICU
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releases continue to utilize the IPL (IBM Public License). Users
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of previous releases of ICU who want to adopt new ICU releases will
need to accept the terms and conditions of the X license.
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< / p >
< p >
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The main effect of the change is to provide GPL compatibility.
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The X license is listed as GPL compatible, see the GNU page at
< a href = "http://www.gnu.org/philosophy/license-list.html#GPLCompatibleLicenses" >
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http://www.gnu.org/philosophy/license-list.html#GPLCompatibleLicenses< / a > .
This means that GPL projects can now use ICU code, it does < b > not< / b >
mean that projects using ICU become subject to GPL.
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< / p >
< p >
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The IBM version contains the essential text of the license, omitting the
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X-specific trademarks and copyright notices. The full copy of < a
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href="main/shared/licenses/license.html">ICU's license< / a > is included in the download
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package.
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< / p >
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< h3 class = "doc" > < a name = "PlatformDependencies" > < / a > Platform Dependencies< / h3 >
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< p >
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ICU4J 4.6 depends on J2SE 5.0 functionality. Therefore, ICU4J only runs on
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JRE version 5.0 or later.
The table below shows the operating systems and JRE/VM versions currently
used by the ICU development team to test ICU4J.
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< / p >
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< table border = "1" >
< tr >
< th rowspan = "3" > Operating System< / th >
< th colspan = "4" > JRE/Hotspot< / th >
< th colspan = "4" > JRE/IBM J9< / th >
< / tr >
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< tr >
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< th colspan = "2" > 1.6.0< / th >
< th colspan = "2" > 1.5.0< / th >
< th colspan = "2" > 1.6.0< / th >
< th colspan = "2" > 1.5.0< / th >
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< / tr >
< tr >
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< th > 32bit< / th >
< th > 64bit< / th >
< th > 32bit< / th >
< th > 64bit< / th >
< th > 32bit< / th >
< th > 64bit< / th >
< th > 32bit< / th >
< th > 64bit< / th >
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< / tr >
< tr >
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< th > AIX 5.3< / th >
< td align = "center" > -< / td >
< td align = "center" > -< / td >
< td align = "center" > -< / td >
< td align = "center" > -< / td >
< td align = "center" > -< / td >
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< td align = "center" bgcolor = "#DDDDFF" > Regularly tested< / td >
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< td align = "center" > -< / td >
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< td align = "center" bgcolor = "#DDDDFF" > Regularly tested< / td >
< / tr >
< tr >
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< th > AIX 6.1< / th >
< td align = "center" > -< / td >
< td align = "center" > -< / td >
< td align = "center" > -< / td >
< td align = "center" > -< / td >
< td align = "center" > -< / td >
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< td align = "center" bgcolor = "#CCCCFF" > < em > < b > Reference platform< / b > < / em > < / td >
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< td align = "center" > -< / td >
< td align = "center" bgcolor = "#DDDDFF" > Regularly tested< / td >
< / tr >
< tr >
< th > HP-UX 11 (PA-RISC)< / th >
< td align = "center" > -< / td >
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< td align = "center" bgcolor = "#DDDDFF" > Regularly tested< / td >
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< td align = "center" > -< / td >
< td align = "center" bgcolor = "#DDDDFF" > Regularly tested< / td >
< td align = "center" > -< / td >
< td align = "center" > -< / td >
< td align = "center" > -< / td >
< td align = "center" > -< / td >
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< / tr >
< tr >
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< th > HP-UX 11 (IA64)< / th >
< td align = "center" > -< / td >
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< td align = "center" bgcolor = "#DDDDFF" > Regularly tested< / td >
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< td align = "center" > -< / td >
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< td align = "center" bgcolor = "#DDDDFF" > Regularly tested< / td >
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< td align = "center" > -< / td >
< td align = "center" > -< / td >
< td align = "center" > -< / td >
< td align = "center" > -< / td >
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< / tr >
< tr >
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< th > Mac OS X 10.5< / th >
< td align = "center" > -< / td >
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< td align = "center" bgcolor = "#DDDDFF" > Regularly tested< / td >
< td align = "center" bgcolor = "#DDDDFF" > Regularly tested< / td >
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< td align = "center" > -< / td >
< td align = "center" > -< / td >
< td align = "center" > -< / td >
< td align = "center" > -< / td >
< td align = "center" > -< / td >
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< / tr >
< tr >
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< th > Redhat Enterprise Linux 5 (x86)< / th >
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< td align = "center" bgcolor = "#DDDDFF" > Regularly tested< / td >
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< td align = "center" > -< / td >
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< td align = "center" bgcolor = "#DDDDFF" > Regularly tested< / td >
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< td align = "center" > -< / td >
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< td align = "center" bgcolor = "#DDDDFF" > Regularly tested< / td >
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< td align = "center" > -< / td >
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< td align = "center" bgcolor = "#DDDDFF" > Regularly tested< / td >
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< td align = "center" > -< / td >
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< / tr >
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< tr >
< th > Redhat Enterprise Linux 5 (x86_64)< / th >
< td align = "center" > -< / td >
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< td align = "center" bgcolor = "#DDDDFF" > Regularly tested< / td >
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< td align = "center" > -< / td >
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< td align = "center" bgcolor = "#DDDDFF" > Regularly tested< / td >
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< td align = "center" > -< / td >
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< td align = "center" bgcolor = "#DDDDFF" > Regularly tested< / td >
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< td align = "center" > -< / td >
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< td align = "center" bgcolor = "#DDDDFF" > Regularly tested< / td >
< / tr >
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< tr >
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< th > Solaris 9 (SPARC)< / th >
< td align = "center" bgcolor = "#DDDDFF" > Regularly tested< / td >
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< td align = "center" > -< / td >
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< td align = "center" bgcolor = "#DDDDFF" > Regularly tested< / td >
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< td align = "center" > -< / td >
< td align = "center" > -< / td >
< td align = "center" > -< / td >
< td align = "center" > -< / td >
< td align = "center" > -< / td >
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< / tr >
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< tr >
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< th > Solaris 10 (SPARC)< / th >
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< td align = "center" > -< / td >
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< td align = "center" bgcolor = "#CCCCFF" > < em > < b > Reference platform< / b > < / em > < / td >
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< td align = "center" > -< / td >
< td align = "center" bgcolor = "#DDDDFF" > Regularly tested< / td >
< td align = "center" > -< / td >
< td align = "center" > -< / td >
< td align = "center" > -< / td >
< td align = "center" > -< / td >
< / tr >
< tr >
< th > Windows XP< / th >
< td align = "center" bgcolor = "#DDDDFF" > Regularly tested< / td >
< td align = "center" > -< / td >
< td align = "center" bgcolor = "#DDDDFF" > Regularly tested< / td >
< td align = "center" > -< / td >
< td align = "center" bgcolor = "#DDDDFF" > Regularly tested< / td >
< td align = "center" > -< / td >
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< td align = "center" bgcolor = "#DDDDFF" > Regularly tested< / td >
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< td align = "center" > -< / td >
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< / tr >
< tr >
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< th > Windows Vista< / th >
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< td align = "center" bgcolor = "#DDDDFF" > Regularly tested< / td >
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< td align = "center" > -< / td >
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< td align = "center" bgcolor = "#DDDDFF" > Regularly tested< / td >
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< td align = "center" > -< / td >
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< td align = "center" bgcolor = "#DDDDFF" > Regularly tested< / td >
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< td align = "center" > -< / td >
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< td align = "center" bgcolor = "#DDDDFF" > Regularly tested< / td >
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< td align = "center" > -< / td >
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< / tr >
< tr >
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< th > Windows 7< / th >
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< td align = "center" bgcolor = "#DDDDFF" > Regularly tested< / td >
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< td align = "center" > -< / td >
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< td align = "center" bgcolor = "#DDDDFF" > Regularly tested< / td >
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< td align = "center" > -< / td >
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< td align = "center" bgcolor = "#CCCCFF" > < em > < b > Reference platform< / b > < / em > < / td >
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< td align = "center" > -< / td >
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< td align = "center" bgcolor = "#DDDDFF" > Regularly tested< / td >
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< td align = "center" > -< / td >
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< / tr >
< tr >
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< th > Windows 2008 Server< / th >
< td align = "center" > -< / td >
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< td align = "center" bgcolor = "#DDDDFF" > Regularly tested< / td >
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< td align = "center" > -< / td >
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< td align = "center" bgcolor = "#DDDDFF" > Regularly tested< / td >
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< td align = "center" > -< / td >
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< td align = "center" bgcolor = "#DDDDFF" > Regularly tested< / td >
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< td align = "center" > -< / td >
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< td align = "center" bgcolor = "#DDDDFF" > Regularly tested< / td >
< / tr >
< / table >
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< h3 class = "doc" > < a name = "download" > < / a > How to Download ICU4J< / h3 >
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< p > There are two ways to download the ICU4J releases.
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< / p >
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< ul type = "disc" >
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< li > < b > Official Release:< / b > < br >
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If you want to use ICU4J (as opposed to developing it), your best bet
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is to download an official, packaged version of the ICU4J library files.
These versions are tested more thoroughly than day-to-day development
builds, and they are packaged in jar files for convenient download.
These packaged files can be found at the
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< a href = "http://www.icu-project.org/download/" > ICU Download page< / a > .
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< / li > < / ul >
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< ul type = "disc" >
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< li > < b > Subversion Source Repository:< / b > < br >
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If you are interested in developing features, patches, or bug fixes for
ICU4J, you should probably be working with the latest version of the
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ICU4J source code. You will need to check the code out of our Subversion
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repository to ensure that you have the most recent version of all of
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the files. There are several ways to do this. Please follow the
directions that are contained on the < a
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href="http://www.icu-project.org/repository/">Source
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Repository page< / a > for details.
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< / li >
< / ul >
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< p > For more details on how to download ICU4J directly from the web
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site, please see the ICU download page at < a
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href="http://www.icu-project.org/download/">http://www.icu-project.org/download/< / a >
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< / p >
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< h3 class = "doc" > < a name = "WhatContain" > < / a > The Structure and Contents of
ICU4J< / h3 >
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< p > Below, all directory pathes are relative to the directory where the
ICU4J source archive is extracted.
< / p >
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< p > < b > Information and build files:< / b > < / p >
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< table border = "1" >
< tr >
< th > Path< / th >
< th > Description< / th >
< / tr >
< tr >
< td > readme.html< / td >
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< td > A description of ICU4J (International Components for Unicode for Java)< / td >
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< / tr >
< tr >
< td > build.html< / td >
< td > The main Ant build file for ICU4J. See < a href = "#HowToInstallJavac" > How to Install
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and Build< / a > for more information< / td >
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< / tr >
< tr >
< td > main/shared/licenses/license.html< / td >
< td > The X license, used by ICU4J< / td >
< / tr >
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< / table >
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< p > < b > ICU4J runtime class files:< / b > < / p >
< table border = "1" >
< tr >
< th > Path< / th >
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< th > Sub-component Name< / th >
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< th > Build Dependencies< / th >
< th > Public API Packages< / th >
< th > Description< / th >
< / tr >
< tr >
< td > main/classes/charset< / td >
< td > icu4j-charset< / td >
< td > icu4j-core< / td >
< td > com.ibm.icu.charset< / td >
< td > Implementation of < code > java.nio.charset.spi.CharsetProvider< / code > .
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This sub-component is shipped as icu4j-charsets.jar along with
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ICU charset converter data files.< / td >
< / tr >
< tr >
< td > main/classes/collate< / td >
< td > icu4j-collate< / td >
< td > icu4j-core< / td >
< td > com.ibm.icu.text< br >
com.ibm.icu.util< / td >
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< td > Collator APIs and implementation. Also includes some public API classes
that depend on Collator.
This sub-component is packaged as a part of icu4j.jar.< / td >
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< / tr >
< tr >
< td > main/classes/core< / td >
< td > icu4j-core< / td >
< td > n/a< / td >
< td > com.ibm.icu.lang< br >
com.ibm.icu.math< br >
com.ibm.icu.text< br >
com.ibm.icu.util< / td >
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< td > ICU core API classes and implementation.
This sub-component is packaged as a part of icu4j.jar.< / td >
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< / tr >
< tr >
< td > main/classes/currdata< / td >
< td > icu4j-currdata< / td >
< td > icu4j-core< / td >
< td > n/a< / td >
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< td > No public API classes. Provides access to currency display data.
This sub-component is packaged as a part of icu4j.jar.< / td >
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< / tr >
< tr >
< td > main/classes/langdata< / td >
< td > icu4j-langdata< / td >
< td > icu4j-core< / td >
< td > n/a< / td >
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< td > No public API classes. Provides access to language display data.
This sub-component is packaged as a part of icu4j.jar.< / td >
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< / tr >
< tr >
< td > main/classes/localespi< / td >
< td > icu4j-localespi< / code >
< td > icu4j-core< br >
icu4j-collate< br >
< / td >
< td > n/a< / td >
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< td > Implementation of various locale-sensitive service providers defined
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in < code > java.text.spi< / code > and < code > java.util.spi< / code > in J2SE 6.0
or later Java releases.
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This sub-component is shipped as icu4j-localespi.jar.< / td >
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< / tr >
< tr >
< td > main/classes/regiondata< / td >
< td > icu4j-regiondata< / td >
< td > icu4j-core< / td >
< td > n/a< / td >
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< td > No public API classes. Provides access to region display data.
This sub-component is packaged as a part of icu4j.jar.< / td >
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< / tr >
< tr >
< td > main/classes/translit< / td >
< td > icu4j-translit< / td >
< td > icu4j-core< / td >
< td > com.ibm.icu.text< / td >
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< td > Transliterator APIs and implementation.
This sub-component is packaged as a part of icu4j.jar.< / td >
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< / tr >
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< / table >
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< p > < b > ICU4J unit test files:< / b > < / p >
< table border = "1" >
< tr >
< th > Path< / th >
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< th > Sub-component Name< / th >
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< th > Runtime Dependencies< / th >
< th > Description< / th >
< / tr >
< tr >
< td > main/tests/charset< / td >
< td > icu4j-charset-tests< / td >
< td > icu4j-charset< br >
icu4j-core< br >
icu4j-test-framework< / td >
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< td > Test suite for charset sub-component.< / td >
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< / tr >
< tr >
< td > main/tests/collate< / td >
< td > icu4j-collate-tests< / td >
< td > icu4j-collate< br >
icu4j-core< br >
icu4j-test-framework< / td >
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< td > Test suite for collate sub-component.< / td >
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< / tr >
< tr >
< td > main/tests/core< / td >
< td > icu4j-core-tests< / td >
< td > icu4j-core< br >
icu4j-currdata< br >
icu4j-langdata< br >
icu4j-regiondata< br >
icu4j-test-framework< / td >
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< td > Test suite for core sub-component.< / td >
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< / tr >
< tr >
< td > main/tests/framework< / td >
< td > icu4j-test-framework< / td >
< td > icu4j-core< / td >
< td > Common ICU4J unit test framework and utilities.< / td >
< / tr >
< tr >
< td > main/tests/localespi< / td >
< td > icu4j-localespi-tests< / td >
< td > icu4j-core< br >
icu4j-collate< br >
icu4j-currdata< br >
icu4j-langdata< br >
icu4j-localespi< br >
icu4j-regiondata< br >
icu4j-test-framework< / td >
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< td > Test suite for localespi sub-component.< / td >
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< / tr >
< tr >
< td > main/tests/packaging< / td >
< td > icu4j-packaging-tests< / td >
< td > icu4j-core< br >
icu4j-test-framework< / td >
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< td > Test suite for sub-component packaging.< / td >
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< / tr >
< tr >
< td > main/tests/translit< / td >
< td > icu4j-translit-tests< / td >
< td > icu4j-core< br >
icu4j-translit
icu4j-test-framework< / td >
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< td > Test suite for translit sub-component.< / td >
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< / tr >
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< / table >
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< p > < b > Others:< / b > < / p >
< table border = "1" >
< tr >
< th > Path< / td >
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< th > Description< / td >
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< / tr >
< tr >
< td > main/shared< / td >
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< td > Files shared by ICU4J sub-components under the < code > main< / code > directory including:
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< ul >
< li > ICU4J runtime data archive (icudata.jar).< li >
< li > ICU4J unit test data archive (testdata.jar).< li >
< li > Shared Ant build script and configuration files.< / li >
< li > License files.< / li >
< / ul >
< / td >
< / tr >
< tr >
< td > demos< / td >
< td > ICU4J demo programs.< / td >
< / tr >
< tr >
< td > perf-tests< / td >
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< td > ICU4J performance test files.< / td >
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< / tr >
< tr >
< td > tools< / td >
< td > ICU4J tools including:
< ul >
< li > Custom JavaDoc taglets used for generating ICU4J API references.< / li >
< li > API report tool and data.< / li >
< li > Other independent utilities used for ICU4J development.< / li >
< / ul >
< / td >
< / tr >
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< / table >
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< h3 class = "doc" > < a name = "API" > < / a > Where to get Documentation< / h3 >
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< p > The < a href = "http://www.icu-project.org/userguide/" > ICU user's
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guide< / a > contains lots of general information about ICU, in its C,
C++, and Java incarnations.< / p >
< p > The complete API documentation for ICU4J (javadoc) is available on
the ICU4J web site, and can be built from the sources:
< / p >
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< ul >
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< li > < a href = "http://www.icu-project.org/apiref/icu4j/" > Index
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to all ICU4J API< / a > < / li >
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< li > < a href = "http://www.icu-project.org/apiref/icu4j/com/ibm/icu/text/CharsetDetector.html" > Charset Detector< / a > – Detection of charset from a byte stream< / li >
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< li > International Calendars –
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< a
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href="http://www.icu-project.org/apiref/icu4j/com/ibm/icu/util/BuddhistCalendar.html">Buddhist< / a > ,
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< a
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href="http://www.icu-project.org/apiref/icu4j/com/ibm/icu/util/ChineseCalendar.html">Chinese< / a > ,
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< a
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href="http://www.icu-project.org/apiref/icu4j/com/ibm/icu/util/CopticCalendar.html">Coptic< / a > ,
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< a
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href="http://www.icu-project.org/apiref/icu4j/com/ibm/icu/util/EthiopicCalendar.html">Ethiopic< / a > ,
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< a
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href="http://www.icu-project.org/apiref/icu4j/com/ibm/icu/util/GregorianCalendar.html">Gregorian< / a > ,
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< a
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href="http://www.icu-project.org/apiref/icu4j/com/ibm/icu/util/HebrewCalendar.html">Hebrew< / a > ,
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< a
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href="http://www.icu-project.org/apiref/icu4j/com/ibm/icu/util/IndianCalendar.html">Indian< / a > ,
< a
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href="http://www.icu-project.org/apiref/icu4j/com/ibm/icu/util/IslamicCalendar.html">Islamic< / a > ,
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< a
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href="http://www.icu-project.org/apiref/icu4j/com/ibm/icu/util/JapaneseCalendar.html">Japanese< / a > .< / li >
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< li > < a
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href="http://www.icu-project.org/apiref/icu4j/com/ibm/icu/text/Normalizer.html">Unicode
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Normalization< / a > – Canonical text representation for W3C.< / li >
< li > < a
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href="http://www.icu-project.org/apiref/icu4j/com/ibm/icu/text/NumberFormat.html">Number
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Format Enhancements< / a > – Scientific Notation, Spelled out.< / li >
< li > < a
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href="http://www.icu-project.org/apiref/icu4j/com/ibm/icu/text/BreakIterator.html">Enhanced
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word-break detection< / a > – Rule-based, supports Thai< / li >
< li > < a
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href="http://www.icu-project.org/apiref/icu4j/com/ibm/icu/text/Transliterator.html">Transliteration< / a >
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– A general framework for converting text from one format to another,
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e.g. Cyrillic to Latin, or Hex to Unicode. < / li >
< li > Unicode Text < a
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href="http://www.icu-project.org/apiref/icu4j/com/ibm/icu/text/UnicodeCompressor.html">Compression< / a >
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& < a
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href="http://www.icu-project.org/apiref/icu4j/com/ibm/icu/text/UnicodeDecompressor.html">Decompression< / a >
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– 2:1 compression on English Unicode text.< / li >
< li > Collation - < a
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href="http://www.icu-project.org/apiref/icu4j/com/ibm/icu/text/RuleBasedCollator.html">Rule-based
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sorting< / a > , < a
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href="http://www.icu-project.org/apiref/icu4j/com/ibm/icu/text/StringSearch.html">Efficient
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multi-lingual searching< / a > < / li >
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< / ul >
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< h3 class = "doc" > < a name = "HowToInstallJavac" > < / a > How to Install and Build< / h3 >
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< p >
To install ICU4J, simply place the prebuilt jar file < strong > icu4j.jar< / strong >
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on your Java CLASSPATH. If you need Charset API support please also place
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< strong > icu4j-charsets.jar< / strong > on your class path along with < strong > icu4j.jar< / strong > .
< / p >
< p >
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To build ICU4J, you will need J2SE SDK 5.0 or later (ICU4J locale SPI
provider sub-components require J2SE SDK 6.0 or later) and the Ant build system
version 1.7 or later. It's recommended to install both the J2SE SDK and Ant
somewhere < em > outside< / em > the ICU4J directory. For example, on Linux you might install
these in < code > /usr/local< / code > .< / p >
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< ul >
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< li > Install J2SE SDK 6.0.< / li >
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< li > Install the < a href = "http://ant.apache.org/" > < strong > Ant< / strong > < / a >
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build system. Ant is a portable, Java-based build system similar to
make. ICU4J uses Ant because it introduces no other dependencies, it's
portable, and it's easier to manage than a collection of makefiles. We
currently build ICU4J using a single makefile on all platforms Ant.
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The build system requires Ant 1.7 or later.
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< p > Installing Ant is straightforward. Download it (see < a
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href="http://ant.apache.org/bindownload.cgi">http://ant.apache.org/bindownload.cgi< / a > ),
extract it onto your system, set some environment variables, and add
its bin directory to your path. For example: < / p >
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< pre >
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set JAVA_HOME=C:\jdk1.6.0
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set ANT_HOME=C:\ant
set PATH=%PATH%;%ANT_HOME%\bin< / pre >
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< p > See the current Ant documentation for details.< / p >
< / li >
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< / ul >
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< p > Once the J2SE SDK and Ant are installed, building is just a matter of
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typing < strong > ant< / strong > in the ICU4J root directory. This causes the
Ant build system to perform the build target < strong > jar< / strong >
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as specified by the file < strong > build.xml< / strong > , located in the ICU4J
root directory. You can give Ant options like -verbose, and you can specify
other targets. For example:< / p >
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< blockquote >
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< pre > C:\icu4j>ant
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Buildfile: build.xml
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info:
[echo] ----- Build Environment Information -------------------
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[echo] Java Home: C:\jdk1.6.0
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[echo] Java Version: 1.6.0
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[echo] Ant Home: C:\ant
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[echo] Ant Version: Apache Ant version 1.7.1 compiled on June 27 2008
[echo] OS: Windows Vista
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[echo] OS Version: 6.1 build 7600
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[echo] OS Arch: x86
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[echo] Host: ICUDEV
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[echo] -------------------------------------------------------
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core:
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@compile:
[echo] --- java compiler arguments ------------------------
[echo] source dir: C:\icu4j\main\classes\core/src
[echo] output dir: C:\icu4j\main\classes\core/out/bin
[echo] classpath:
[echo] source: 1.5
[echo] target: 1.5
[echo] debug: on
[echo] encoding: ascii
[echo] compiler arg: -Xlint:all,-deprecation,-dep-ann
[echo] ----------------------------------------------------
[mkdir] Created dir: C:\icu4j\main\classes\core\out\bin
[javac] Compiling 316 source files to C:\icu4j\main\classes\core\out\bin
[javac] Note: Some input files use or override a deprecated API.
[javac] Note: Recompile with -Xlint:deprecation for details.
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compile:
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@copy:
[copy] Copying 23 files to C:\icu4j\main\classes\core\out\bin
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copy-data:
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[unjar] Expanding: C:\icu4j\main\shared\data\icudata.jar into C:\icu4j\main\classes\core\out\bin
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....
....
....
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build:
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_build-localespi:
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@compile:
[echo] --- java compiler arguments ------------------------
[echo] source dir: C:\icu4j\main\classes\localespi/src
[echo] output dir: C:\icu4j\main\classes\localespi/out/bin
[echo] classpath: C:\icu4j\main\classes\core\out\lib\icu4j-core.jar;C:\icu4j\main\classes\collate\
out\lib\icu4j-collate.jar
[echo] source: 1.6
[echo] target: 1.6
[echo] debug: on
[echo] encoding: ascii
[echo] compiler arg: -Xlint:all,-deprecation,-dep-ann
[echo] ----------------------------------------------------
[mkdir] Created dir: C:\icu4j\main\classes\localespi\out\bin
[javac] Compiling 22 source files to C:\icu4j\main\classes\localespi\out\bin
compile:
@copy:
[copy] Copying 10 files to C:\icu4j\main\classes\localespi\out\bin
copy:
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@jar:
[mkdir] Created dir: C:\icu4j\main\classes\localespi\out\lib
[copy] Copying 1 file to C:\icu4j\main\classes\localespi\out
[jar] Building jar: C:\icu4j\main\classes\localespi\out\lib\icu4j-localespi.jar
jar:
build:
jar:
[copy] Copying 1 file to C:\icu4j
[copy] Copying 1 file to C:\icu4j
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BUILD SUCCESSFUL
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Total time: 24 seconds< / pre >
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< / blockquote >
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< I > Note: The above output is an example. The numbers are likely to be different with the current version ICU4J.< / I >
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< p > The following are some targets that you can provide to < b > ant< / b > .
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For more targets run < code > ant -projecthelp< / code > or see the build.xml file.< / p >
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< table border = "1" >
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< tr >
< th > jar (default)< / th >
< td > Create ICU4J runtime library jar archives (< code > icu4j.jar< / code > ,
< code > icu4j-charsets.jar< / code > and < code > icu4j-localespi.jar< / code > )
in the root ICU4J directory.< / td >
< / tr >
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< tr >
< th > check< / th >
< td > Build all ICU4J runtime library classes and corresponding unit test cases,
then run the tests.< / td >
< / tr >
< tr >
< th > clean< / th >
< td > Remove all build output files.< / td >
< / tr >
< tr >
< th > main< / th >
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< td > Build all ICU4J runtime library sub-components (under the directory
< code > main/classes< / code > ).< / td >
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< / tr >
< tr >
< th > tests< / th >
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< td > Build all ICU4J unit test sub-components (under the directory < code > main/tests< / code > )
and their dependencies.< / td >
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< / tr >
< tr >
< th > tools< / th >
< td > Build the tools.< / td >
< / tr >
< tr >
< th > docs< / th >
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< td > Run javadoc over the ICU4J runtime library files, generating an HTML documentation
tree in the subdirectory < code > doc< / code > .< / td >
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< / tr >
< tr >
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< th > jarDocs< / th >
< td > Create ICU4J doc jar archive (< code > icu4jdocs.jar< / code > ) containing API reference
docs in the root ICU4J directory. < / td >
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< / tr >
< tr >
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< th > jarDemos< / th >
< td > Create ICU4J demo jar archive (< code > icu4jdemos.jar< / code > ) in the root ICU4J
directory.< / td >
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< / tr >
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< / table >
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< p > For more information, read the Ant documentation and the < strong > build.xml< / strong >
file.< / p >
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< b > Note:< / b > If you get an OutOfMemoryError when you are running < tt > "ant check"< / tt > ,
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you can set the heap size of the jvm by setting the environment variable JVM_OPTIONS
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to the appropriate java options.< / p >
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< p > < b > Eclipse users:< / b > See the ICU4J site for information on< a
href="http://www.icu-project.org/docs/eclipse_howto/eclipse_howto.html">
how to configure Eclipse< / a > to build and develop ICU4J on Eclipse IDE.< / p >
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< p > < b > Note: < / b > To install ICU4J Locale Service Provider, please refer
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< a href = "localespi/readme.html" > Read Me for ICU4J Locale Service Provider< / a > .< / p >
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< h3 class = "doc" > < a name = "HowToModularize" > < / a > How to modularize ICU4J< / h3 >
< p > Some clients may not wish to ship all of ICU4J with their
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application, since the application might only use a small part of ICU4J.
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ICU4J release 2.6 and later provide build options to build individual
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ICU4J 'modules' for a more compact distribution. For more details, please
refer to the section < em > Modularization of ICU4J< / em > in the ICU user's
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guide article < a href = "http://userguide.icu-project.org/packaging-icu4j" > Packaging ICU4J< / a > .
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< h3 class = "doc" > < a name = "tryingout" > < / a > Trying Out ICU4J< / h3 >
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< p > < strong > Note:< / strong > the demos provided with ICU4J are for the
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most part undocumented. This list can show you where to look, but
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you'll have to experiment a bit. The demos are < strong > unsupported< / strong >
and may change or disappear without notice.< / p >
< p > The icu4j.jar file contains only the ICU4J runtime library classes, not the
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demo classes, so unless you build ICU4J there is little to try out.
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< / p >
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< h4 > Charset< / h4 >
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To try out the < strong > Charset< / strong > package, build < strong > icu4j.jar< / strong > and
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< strong > icu4j-charsets.jar< / strong > using the 'jar' target.
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You can use the charsets by placing these files on your classpath.
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< blockquote > < tt > java -cp $icu4j_root/icu4j.jar:$icu4j_root/icu4j-charsets.jar < your program> < / tt > < / blockquote >
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< h4 > Other demos< / h4 >
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< p > The other demo programs are < strong > not supported< / strong > and
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exist only to let you experiment with the ICU4J classes. First, build ICU4J using < tt > ant jarDemos< / tt > .
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Then launch the demos as below:
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< blockquote > < tt > java -jar $icu4j_root/icu4jdemos.jar< / tt > < / blockquote >
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< / p >
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< h3 class = "doc" > < a name = "resources" > ICU4J Resource Information< / a > < / h3 >
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Starting with release 2.1, ICU4J includes its own
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resource information
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which is completely independent of the JRE resource information. (Note,
ICU4J 2.8 to 3.4, time zone information depends on the underlying JRE).
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The ICU4J resource information is equivalent to the information in ICU4C and
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many resources are, in fact, the same binary files that ICU4C uses.
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< p >
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By default the ICU4J distribution includes all of the standard resource
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information. It is located under the directory com/ibm/icu/impl/data.
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Depending on the service, the data is in different locations and in
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different formats. < strong > Note:< / strong > This will continue to change
from release to release, so clients should not depend on the exact
organization
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of the data in ICU4J.< / p >
< ul >
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< li > The primary < b > locale data< / b > is under the directory < tt > icudt45b< / tt > ,
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as a set of < tt > ".res"< / tt > files whose names are the locale identifiers.
Locale naming is documented the < code > com.ibm.icu.util.ULocale< / code >
class, and the use of these names in searching for resources is documented
in < code > com.ibm.icu.util.UResourceBundle< / code > .< / li >
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< li > The < b > collation data< / b > is under the directory < tt > icudt45b/coll< / tt > ,
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as a set of < tt > ".res"< / tt > files.< / li >
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< li > The < b > currency display name data< / b > is under the directory < tt > icudt45b/curr< / tt > ,
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as a set of < tt > ".res"< / tt > files.< / li >
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< li > The < b > language display name data< / b > is under the directory < tt > icudt45b/lang< / tt > ,
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as a set of < tt > ".res"< / tt > files.< / li >
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< li > The < b > region display name data< / b > is under the directory < tt > icudt45b/region< / tt > ,
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as a set of < tt > ".res"< / tt > files.< / li >
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< li > The < b > rule-based transliterator data< / b > is under the directory
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< tt > icudt45b/translit< / tt > , as a set of < tt > ".res"< / tt > files.< / li >
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< li > The < b > rule-based number format data< / b > is under the directory
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< tt > icudt45b/rbnf< / tt > , as a set of < tt > ".res"< / tt > files.
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< li > The < b > break iterator data< / b > is directly under the
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directory < tt > icudt45b< / tt > , as a set of < tt > ".brk"< / tt > files, named according to the
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type of break and the locale where there are locale-specific versions.< / li >
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< li > The < b > holiday data< / b > is under the directory < tt > icudt45b< / tt > ,
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as a set of < tt > ".class"< / tt > files, named < tt > "HolidayBundle_"< / tt >
followed by the locale ID.< / li >
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< li > The < b > character property data< / b > as well as assorted < b > normalization
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data< / b > and default < b > unicode collation algorithm (UCA) data< / b >
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is found under the directory < tt > icudt45b< / tt > , as a set of < tt > ".icu"< / tt >
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files. < / li >
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< li > The < b > character set converter data< / b > is under the directory
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< tt > icudt45b< / tt > , as a set of < tt > ".cnv"< / tt > files. These files are
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currently included only in icu-charset.jar.< / li >
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< li > The < b > time zone rule data< / b > is under the directory
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< tt > icudt45b< / tt > , as < tt > zoneinfo64.res< / tt > .< / li >
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< li > The < b > time zone display name data< / b > is under the directory
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< tt > icudt45b/zone< / tt > , as a set of < tt > ".res"< / tt > files.< / li >
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< / ul >
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< p >
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Some of the data files alias or otherwise reference data from other
data files. One reason for this is because some locale names have
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changed. For example, < tt > he_IL< / tt > used to be < tt > iw_IL< / tt > . In
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order to support both names but not duplicate the data, one of the
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resource files refers to the other file's data. In other cases, a
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file may alias a portion of another file's data in order to save
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space. Currently ICU4J provides no tool for revealing these
dependencies.< / p >
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< blockquote > < strong > Note:< / strong > Java's < code > Locale< / code > class
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silently converts the language code < tt > "he"< / tt > to < tt > "iw"< / tt >
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when you construct the Locale (for versions of Java through Java 5). Thus
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Java cannot be used to locate resources that use the < tt > "he"< / tt >
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language code. ICU, on the other hand, does not perform this
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conversion in ULocale, and instead uses aliasing in the locale data to
represent the same set of data under different locale
ids.< / blockquote >
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< p >
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Resource files that use locale ids form a hierarchy, with up to four
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levels: a root, language, region (country), and variant. Searches for
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locale data attempt to match as far down the hierarchy as possible,
for example, < tt > "he_IL"< / tt > will match < tt > he_IL< / tt > , but
< tt > "he_US"< / tt > will match < tt > he< / tt > (since there is no < tt > US< / tt >
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variant for he, and < tt > "xx_YY< / tt > will match root (the
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default fallback locale) since there is no < tt > xx< / tt > language code
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in the locale hierarchy. Again, see
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< code > java.util.ResourceBundle< / code > for more information.
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< / p >
< p >
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< strong > Currently ICU4J provides no tool for revealing these
dependencies< / strong > between data files, so trimming the data
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directly in the ICU4J project is a hit-or-miss affair. The key point
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when you remove data is to make sure to remove all dependencies on
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that data as well. For example, if you remove < tt > he.res< / tt > , you
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need to remove < tt > he_IL.res< / tt > , since it is lower in the hierarchy,
and you must remove iw.res, since it references < tt > he.res< / tt > , and
< tt > iw_IL.res< / tt > , since it depends on it (and also references
< tt > he_IL.res< / tt > ).
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< / p >
< p >
Unfortunately, the jar tool in the JDK provides no way to remove items
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from a jar file. Thus you have to extract the resources, remove the
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ones you don't want, and then create a new jar file with the remining
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resources. See the jar tool information for how to do this. Before
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'rejaring' the files, be sure to thoroughly test your application with
the remaining resources, making sure each required resource is
present.
< / p >
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< h4 > Using additional resource files with ICU4J< / h4 >
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< blockquote >
< table cellpadding = "3" frame = "border" rules = "none" width = "50%" >
< tbody >
< tr >
< td > < b > < font color = "red" size = "+1" > Warning:< / font > Resource
file formats can change across releases of ICU4J!< / b > < / td >
< / tr >
< tr >
< td > The format of ICU4J resources is not part of the API.
Clients who develop their own resources for use with ICU4J should be
prepared to
regenerate them when they move to new releases of ICU4J.< / td >
< / tr >
< / tbody >
< / table >
< / blockquote >
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< p >
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We are still developing ICU4J's resource mechanism. Currently it
is not possible to mix icu's new binary < tt > .res< / tt >
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resources
with traditional java-style < tt > .class< / tt > or < tt > .txt< / tt >
resources. We might
allow for this in a future release, but since the resource data and
format is not formally
supported, you run the risk of incompatibilities with future releases
of ICU4J.
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< / p >
< p >
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Resource data in ICU4J is checked in to the repository as a jar file
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containing the resource binaries, < tt > icudata.jar< / tt > . This
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means that inspecting the contents of these resources is difficult.
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They currently are compiled from ICU4C < tt > .txt< / tt > file data. You
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can view the contents of the ICU4C text resource files to understand
the contents of the ICU4J resources.
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< / p >
< p >
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The files in < tt > icudata.jar< / tt > get extracted to < tt > com/ibm/icu/impl/data< / tt >
in
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the build directory when the 'core' target is built.
Building the < tt > 'resources'< / tt > target will force the
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resources to once again be extracted. Extraction will
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overwrite any corresponding resource files already in that directory.
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< / p >
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< h4 > < a name = "resourcesICU4C" > Building ICU4J Resources from ICU4C< / a > < / h4 >
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ICU4J data is built by ICU4C tools. Please see "icu4j-readme.txt" in < I > $icu4c_root< / I > /source/data for the procedures.
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< h5 > Generating Data from CLDR < / h5 >
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< I > Note: This procedure assumes that all 3 sources are in sibling directories< / I >
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< ol >
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< li > Checkout CLDR. $cldr_root in the following steps is the root directory where
the CLDR source files checked out.< / li >
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< li > Update < I > $cldr_root< / I > /common to 'release-1-8-0' tag< / li >
< li > Update < I > $cldr_root< / I > /tools to 'release-1-8-0' tag< / li >
< li > Checkout ICU4C with tag 'release-4-4'< / li >
< li > Checkout ICU4J with tag 'release-4-4'< / li >
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< li > Build ICU4J< / li >
< li > Build ICU4C< / li >
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< li > Change to < I > $cldr_root< / I > /tools/java directory< / li >
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< li > Build CLDR using ant after pointing ICU4J_CLASSES env var to the newly build ICU4J< / li >
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< li > cd to < I > $icu4c_root< / I > /source/data directory< / li >
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< li > Follow the instructions in the cldr-icu-readme.txt< / li >
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< li > Build ICU4C data from CLDR< / li >
< li > Build ICU4J data from ICU4C data by following the procedures in < I > $icu4c_root< / I > /source/data/icu4j-readme.txt< / li >
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< li > cd to < I > $icu4j_root< / I > dir< / li >
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< li > Build and test icu4j< / li >
< / ol >
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< h3 class = "doc" > < a name = "timezone" > < / a > About ICU4J Time Zone< / h3 >
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< p > ICU4J 4.6M2 includes time zone data version 2010m, which is the latest one as of
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the release date. However, time zone data is frequently updated in response
to changes made by local governments around the world. If you need to update
the time zone data, please refer the ICU user guide topic
< a href = "http://www.icu-project.org/userguide/dateTimezone.html#tzupdate" > Updating the Time Zone Data< / a > .< / p >
< p > Starting with ICU4J 4.0, you can optionally configure ICU4J date and time
service classes to use underlying JDK TimeZone implementation (see the ICU4J API reference
< a href = "http://www.icu-project.org/apiref/icu4j/com/ibm/icu/util/TimeZone.html" > TimeZone< / a >
for the details). When this configuration is enabled, ICU's own time zone data
won't be used and you have to get time zone data patches from the JRE vendor.< / p >
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< h3 class = "doc" > < a name = "WhereToFindMore" > < / a > Where to Find More
Information< / h3 >
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< p > < a href = "http://www.icu-project.org/" > http://www.icu-project.org/< / a >
is the home page of International Components for Unicode development project< / p >
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< p > < a href = "http://www.ibm.com/software/globalization/icu/" > http://www.ibm.com/software/globalization/icu/< / a >
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is a pointer to general information about the International Components for
Unicode hosted by IBM< / p >
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< p > < a href = "http://www.ibm.com/software/globalization/" > http://www.ibm.com/software/globalization/< / a >
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is a pointer to
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information on how to make applications global. < / p >
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< h3 class = "doc" > < a name = "SubmittingComments" > < / a > Submitting Comments,
Requesting Features and
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Reporting Bugs< / h3 >
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< p > Your comments are important to making ICU4J successful. We are
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committed to investigate any bug reports or suggestions,
and will use your feedback to help plan future releases.< / p >
< p > To submit comments, request features and report bugs,
please see < a href = "http://www.icu-project.org/bugs.html" > ICU bug database
information< / a > or contact us through the < a
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href="http://www.icu-project.org/contacts.html">ICU Support
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mailing list< / a > . While we are not able to respond individually to each comment, we do
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review all comments.< / p >
< br >
< br >
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< h2 > Thank you for your interest in ICU4J!< / h2 >
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< br >
< hr align = "center" size = "2" width = "100%" >
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< p > < I > < font size = "-1" > Copyright © 2002-2010 International Business
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Machines Corporation and others. All Rights
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Reserved.< br >
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4400 North First Street, San José , CA 95193, USA
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< / font > < / I > < / p >
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< / body >
< / html >
