ICU is the premier library for software internationalization, used by a wide array of companies and organizations.
Release OverviewThe features for this release include support of CLDR 29 and Unicode 8.0 with grapheme/word/line breaking improved for Emoji sequences.
List of tickets fixed in ICU 57
Common Changes
- CLDR 29: For details of the many changes in CLDR, see CLDR 29.
- Grapheme/word/line breaking for emoji sequences, based on Unicode 9 proposed rules. See the Unicode emoji break proposal and the Unicode Emoji Technical Report Proposed Update describing the new emoji sequences. (#12081).
- Four new Unicode emoji properties (#11802).
- DateFormat day period formatting of "noon", "at night", etc. via new pattern characters b & B, and DateTimePatternGenerator support of C for selecting the customary form (#11872).
- Except: Formatting of "0:00 midnight" has been disabled because it is confusing except for at the end of an interval.
- RelativeDateTimeFormatter: Simpler formatting API (#12072).
- More robust CLDR data loading for MeasureFormat (#11986, #12030), RelativeDateTimeFormatter (#12018), and DateIntervalFormat/DateIntervalInfo (#12013).
- New simple & fast SimpleFormatter class for a trivial subset of MessageFormat as used in CLDR data, e.g., "{0} {1}" (#10896).
ICU4C Specific Changes- C API support for RelativeDateTimeFormatter (#12072).
- Clang annotations for intended switch case fallthroughs, can now compile with -Wimplicit-fallthrough (#12166).
- Internal header files can be compiled by themselves, for simpler alternative build scripts (#12141).
ICU4J Specific Changes
- The minimum execution environment was updated to Java 6 (#12022)
- Compact currency format like "1,2 Mio. €" via CompactDecimalFormat (#10910).
Known Issues- There is an impact on performance and memory impact for the first use of transliterators in a process, likely due to the number of new transforms added in CLDR 29 (#12380).
- C: ICU4C 57.1 does not build with Visual Studio 2015 when using the included project files. See ticket for workaround. (#11822)
- C: ICU4C 57.1 does not build under IBM i. This should be remedied in ICU 58. (#12701)
Migration Issues
- ICU4J classes are compiled against Java SE 6 runtime and the class file format was changed to Java 6. ICU4J 57 no longer supports JRE 5 or older Java runtime.
- There are details on migration issues that may result from CLDR changes on CLDR 29 Migration.
- The ICU license file has been reformatted to plain text and renamed (#12037).
Updates in ICU 57.2- New Japanese era Reiwa (令和) support
- IANA tzdata2019a
ICU4C Download
Latest ICU4C 57 ReleaseVersion: 57.2 Release Date: 2019-04-11 Source and binary downloads are available on the git/GitHub tag page: https://github.com/unicode-org/icu/releases/tag/release-57-2
Previous ICU4C 57 ReleasesVersion: 57.1
Release Date: 2016-03-23
ICU4J Download
Latest ICU4J 57 ReleaseVersion: 57.2 Release Date: 2019-04-11 Source and binary downloads are available on the git/GitHub tag page: https://github.com/unicode-org/icu/releases/tag/release-57-2Maven dependency: <dependency>
<groupId>com.ibm.icu</groupId>
<artifactId>icu4j</artifactId>
<version>57.2</version>
</dependency>
Previous ICU4 ReleasesRelease Date: 2016-03-23
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