Summary

Support the Unicode Standard version 13.0.0 in the JDK.

Problem

Keeping up to the latest Unicode Standard is imperative. Otherwise, interoperability with other platforms would be problematic.

Solution

Incorporate Unicode 13.0 that assigned 5,930 characters, 8 new blocks, and 4 new scripts since Unicode 12.1. Detailed changes are described in the Unicode Consortium's 13.0 website.

java.text.Bidi and java.text.Normalizer classes will be upgraded to 13.0 level of Unicode Annex #9 and #15, respectively.

Support for the Unicode extended grapheme clusters in java.util.regex.Pattern will be upgraded to 13.0 level of the Unicode Annex #29 "Unicode Text Segmentation."

Specification

Change the following statement in the java.lang.Character class description from:

Character information is based on the Unicode Standard, version 12.1.

to:

Character information is based on the Unicode Standard, version 13.0.

In java.lang.Character.UnicodeBlock class, add the following new fields:

/**
 * Constant for the "Yezidi" Unicode
 * character block.
 * @since 15
 */
public static final UnicodeBlock YEZIDI;

/**
 * Constant for the "Chorasmian" Unicode
 * character block.
 * @since 15
 */
public static final UnicodeBlock CHORASMIAN;

/**
 * Constant for the "Dives Akuru" Unicode
 * character block.
 * @since 15
 */
public static final UnicodeBlock DIVES_AKURU;

/**
 * Constant for the "Lisu Supplement" Unicode
 * character block.
 * @since 15
 */
public static final UnicodeBlock LISU_SUPPLEMENT;

/**
 * Constant for the "Khitan Small Script" Unicode
 * character block.
 * @since 15
 */
public static final UnicodeBlock KHITAN_SMALL_SCRIPT;

/**
 * Constant for the "Tangut Supplement" Unicode
 * character block.
 * @since 15
 */
public static final UnicodeBlock TANGUT_SUPPLEMENT;

/**
 * Constant for the "Symbols for Legacy Computing" Unicode
 * character block.
 * @since 15
 */
public static final UnicodeBlock SYMBOLS_FOR_LEGACY_COMPUTING;

/**
 * Constant for the "CJK Unified Ideographs Extension G" Unicode
 * character block.
 * @since 15
 */
public static final UnicodeBlock CJK_UNIFIED_IDEOGRAPHS_EXTENSION_G;

In java.lang.Character.UnicodeScript enum, add the following new fields:

/**
 * Unicode script "Yezidi".
 * @since 15
 */
YEZIDI,

/**
 * Unicode script "Chorasmian".
 * @since 15
 */
CHORASMIAN,

/**
 * Unicode script "Dives Akuru".
 * @since 15
 */
DIVES_AKURU,

/**
 * Unicode script "Khitan Small Script".
 * @since 15
 */
KHITAN_SMALL_SCRIPT,