源码分析，基本上都加载注解上了，如有谬误，请指正，谢谢。
Character由于比较长，只能分多篇了
package com.jiyx.test.java.lang;
import java.io.Serializable;
import java.util.Arrays;
import java.util.HashMap;
import java.util.Locale;
import java.util.Map;
/**
* auther: jiyx
* date: 2018/9/13.
*/
public class Character implements Serializable, Comparable {
/**
* 一系列字符子集，表示Unicode规范中的字符块，
* 字符块通常定义用于特定脚本或目的的字符，
* 字符最多包含一个Unicode块
*
* @since 1.2
*/
public static final class UnicodeBlock extends Character.Subset {
private static Map map = new HashMap<>(256);
/**
* 根据指定的标识符创建unicode块。这个标识符必须与块标识符相同
*/
private UnicodeBlock(String idName) {
super(idName);
map.put(idName, this);
}
/**
* 根据标识符和别名创建unicode块
*/
private UnicodeBlock(String idName, String alias) {
this(idName);
map.put(alias, this);
}
/**
* 根据标识符和别名创建unicode块
*/
private UnicodeBlock(String idName, String... aliases) {
this(idName);
for (String alias : aliases)
map.put(alias, this);
}
/**
* 接下来都是创建各种unicode块
* 可以直接根据英文解读
* 因为篇幅问题只能显示部分
*/
/**
* Constant for the "Basic Latin" Unicode character block.
*
* @since 1.2
*/
public static final UnicodeBlock BASIC_LATIN =
new UnicodeBlock("BASIC_LATIN",
"BASIC LATIN",
"BASICLATIN");
/**
* Constant for the "Latin-1 Supplement" Unicode character block.
*
* @since 1.2
*/
public static final Character.UnicodeBlock LATIN_1_SUPPLEMENT =
new Character.UnicodeBlock("LATIN_1_SUPPLEMENT",
"LATIN-1 SUPPLEMENT",
"LATIN-1SUPPLEMENT");
/**
* 对应的unicode快的，unicode起始位的起始数组
*/
private static final int blockStarts[] = {
0x0000, // 0000..007F; Basic Latin
0x0080, // 0080..00FF; Latin-1 Supplement
0x0100, // 0100..017F; Latin Extended-A
0x0180, // 0180..024F; Latin Extended-B
0x0250, // 0250..02AF; IPA Extensions
0x02B0, // 02B0..02FF; Spacing Modifier Letters
0x0300, // 0300..036F; Combining Diacritical Marks
0x0370, // 0370..03FF; Greek and Coptic
0x0400, // 0400..04FF; Cyrillic
0x0500, // 0500..052F; Cyrillic Supplement
0x0530, // 0530..058F; Armenian
0x0590, // 0590..05FF; Hebrew
0x0600, // 0600..06FF; Arabic
0x0700, // 0700..074F; Syriac
0x0750, // 0750..077F; Arabic Supplement
0x0780, // 0780..07BF; Thaana
0x07C0, // 07C0..07FF; NKo
0x0800, // 0800..083F; Samaritan
0x0840, // 0840..085F; Mandaic
0x0860, // unassigned
0x08A0, // 08A0..08FF; Arabic Extended-A
0x0900, // 0900..097F; Devanagari
0x0980, // 0980..09FF; Bengali
0x0A00, // 0A00..0A7F; Gurmukhi
0x0A80, // 0A80..0AFF; Gujarati
0x0B00, // 0B00..0B7F; Oriya
0x0B80, // 0B80..0BFF; Tamil
0x0C00, // 0C00..0C7F; Telugu
0x0C80, // 0C80..0CFF; Kannada
0x0D00, // 0D00..0D7F; Malayalam
0x0D80, // 0D80..0DFF; Sinhala
0x0E00, // 0E00..0E7F; Thai
0x0E80, // 0E80..0EFF; Lao
0x0F00, // 0F00..0FFF; Tibetan
0x1000, // 1000..109F; Myanmar
0x10A0, // 10A0..10FF; Georgian
0x1100, // 1100..11FF; Hangul Jamo
0x1200, // 1200..137F; Ethiopic
0x1380, // 1380..139F; Ethiopic Supplement
0x13A0, // 13A0..13FF; Cherokee
0x1400, // 1400..167F; Unified Canadian Aboriginal Syllabics
0x1680, // 1680..169F; Ogham
0x16A0, // 16A0..16FF; Runic
0x1700, // 1700..171F; Tagalog
0x1720, // 1720..173F; Hanunoo
0x1740, // 1740..175F; Buhid
0x1760, // 1760..177F; Tagbanwa
0x1780, // 1780..17FF; Khmer
0x1800, // 1800..18AF; Mongolian
0x18B0, // 18B0..18FF; Unified Canadian Aboriginal Syllabics Extended
0x1900, // 1900..194F; Limbu
0x1950, // 1950..197F; Tai Le
0x1980, // 1980..19DF; New Tai Lue
0x19E0, // 19E0..19FF; Khmer Symbols
0x1A00, // 1A00..1A1F; Buginese
0x1A20, // 1A20..1AAF; Tai Tham
0x1AB0, // unassigned
0x1B00, // 1B00..1B7F; Balinese
0x1B80, // 1B80..1BBF; Sundanese
0x1BC0, // 1BC0..1BFF; Batak
0x1C00, // 1C00..1C4F; Lepcha
0x1C50, // 1C50..1C7F; Ol Chiki
0x1C80, // unassigned
0x1CC0, // 1CC0..1CCF; Sundanese Supplement
0x1CD0, // 1CD0..1CFF; Vedic Extensions
0x1D00, // 1D00..1D7F; Phonetic Extensions
0x1D80, // 1D80..1DBF; Phonetic Extensions Supplement
0x1DC0, // 1DC0..1DFF; Combining Diacritical Marks Supplement
0x1E00, // 1E00..1EFF; Latin Extended Additional
0x1F00, // 1F00..1FFF; Greek Extended
0x2000, // 2000..206F; General Punctuation
0x2070, // 2070..209F; Superscripts and Subscripts
0x20A0, // 20A0..20CF; Currency Symbols
0x20D0, // 20D0..20FF; Combining Diacritical Marks for Symbols
0x2100, // 2100..214F; Letterlike Symbols
0x2150, // 2150..218F; Number Forms
0x2190, // 2190..21FF; Arrows
0x2200, // 2200..22FF; Mathematical Operators
0x2300, // 2300..23FF; Miscellaneous Technical
0x2400, // 2400..243F; Control Pictures
0x2440, // 2440..245F; Optical Character Recognition
0x2460, // 2460..24FF; Enclosed Alphanumerics
0x2500, // 2500..257F; Box Drawing
0x2580, // 2580..259F; Block Elements
0x25A0, // 25A0..25FF; Geometric Shapes
0x2600, // 2600..26FF; Miscellaneous Symbols
0x2700, // 2700..27BF; Dingbats
0x27C0, // 27C0..27EF; Miscellaneous Mathematical Symbols-A
0x27F0, // 27F0..27FF; Supplemental Arrows-A
0x2800, // 2800..28FF; Braille Patterns
0x2900, // 2900..297F; Supplemental Arrows-B
0x2980, // 2980..29FF; Miscellaneous Mathematical Symbols-B
0x2A00, // 2A00..2AFF; Supplemental Mathematical Operators
0x2B00, // 2B00..2BFF; Miscellaneous Symbols and Arrows
0x2C00, // 2C00..2C5F; Glagolitic
0x2C60, // 2C60..2C7F; Latin Extended-C
0x2C80, // 2C80..2CFF; Coptic
0x2D00, // 2D00..2D2F; Georgian Supplement
0x2D30, // 2D30..2D7F; Tifinagh
0x2D80, // 2D80..2DDF; Ethiopic Extended
0x2DE0, // 2DE0..2DFF; Cyrillic Extended-A
0x2E00, // 2E00..2E7F; Supplemental Punctuation
0x2E80, // 2E80..2EFF; CJK Radicals Supplement
0x2F00, // 2F00..2FDF; Kangxi Radicals
0x2FE0, // unassigned
0x2FF0, // 2FF0..2FFF; Ideographic Description Characters
0x3000, // 3000..303F; CJK Symbols and Punctuation
0x3040, // 3040..309F; Hiragana
0x30A0, // 30A0..30FF; Katakana
0x3100, // 3100..312F; Bopomofo
0x3130, // 3130..318F; Hangul Compatibility Jamo
0x3190, // 3190..319F; Kanbun
0x31A0, // 31A0..31BF; Bopomofo Extended
0x31C0, // 31C0..31EF; CJK Strokes
0x31F0, // 31F0..31FF; Katakana Phonetic Extensions
0x3200, // 3200..32FF; Enclosed CJK Letters and Months
0x3300, // 3300..33FF; CJK Compatibility
0x3400, // 3400..4DBF; CJK Unified Ideographs Extension A
0x4DC0, // 4DC0..4DFF; Yijing Hexagram Symbols
0x4E00, // 4E00..9FFF; CJK Unified Ideographs
0xA000, // A000..A48F; Yi Syllables
0xA490, // A490..A4CF; Yi Radicals
0xA4D0, // A4D0..A4FF; Lisu
0xA500, // A500..A63F; Vai
0xA640, // A640..A69F; Cyrillic Extended-B
0xA6A0, // A6A0..A6FF; Bamum
0xA700, // A700..A71F; Modifier Tone Letters
0xA720, // A720..A7FF; Latin Extended-D
0xA800, // A800..A82F; Syloti Nagri
0xA830, // A830..A83F; Common Indic Number Forms
0xA840, // A840..A87F; Phags-pa
0xA880, // A880..A8DF; Saurashtra
0xA8E0, // A8E0..A8FF; Devanagari Extended
0xA900, // A900..A92F; Kayah Li
0xA930, // A930..A95F; Rejang
0xA960, // A960..A97F; Hangul Jamo Extended-A
0xA980, // A980..A9DF; Javanese
0xA9E0, // unassigned
0xAA00, // AA00..AA5F; Cham
0xAA60, // AA60..AA7F; Myanmar Extended-A
0xAA80, // AA80..AADF; Tai Viet
0xAAE0, // AAE0..AAFF; Meetei Mayek Extensions
0xAB00, // AB00..AB2F; Ethiopic Extended-A
0xAB30, // unassigned
0xABC0, // ABC0..ABFF; Meetei Mayek
0xAC00, // AC00..D7AF; Hangul Syllables
0xD7B0, // D7B0..D7FF; Hangul Jamo Extended-B
0xD800, // D800..DB7F; High Surrogates
0xDB80, // DB80..DBFF; High Private Use Surrogates
0xDC00, // DC00..DFFF; Low Surrogates
0xE000, // E000..F8FF; Private Use Area
0xF900, // F900..FAFF; CJK Compatibility Ideographs
0xFB00, // FB00..FB4F; Alphabetic Presentation Forms
0xFB50, // FB50..FDFF; Arabic Presentation Forms-A
0xFE00, // FE00..FE0F; Variation Selectors
0xFE10, // FE10..FE1F; Vertical Forms
0xFE20, // FE20..FE2F; Combining Half Marks
0xFE30, // FE30..FE4F; CJK Compatibility Forms
0xFE50, // FE50..FE6F; Small Form Variants
0xFE70, // FE70..FEFF; Arabic Presentation Forms-B
0xFF00, // FF00..FFEF; Halfwidth and Fullwidth Forms
0xFFF0, // FFF0..FFFF; Specials
0x10000, // 10000..1007F; Linear B Syllabary
0x10080, // 10080..100FF; Linear B Ideograms
0x10100, // 10100..1013F; Aegean Numbers
0x10140, // 10140..1018F; Ancient Greek Numbers
0x10190, // 10190..101CF; Ancient Symbols
0x101D0, // 101D0..101FF; Phaistos Disc
0x10200, // unassigned
0x10280, // 10280..1029F; Lycian
0x102A0, // 102A0..102DF; Carian
0x102E0, // unassigned
0x10300, // 10300..1032F; Old Italic
0x10330, // 10330..1034F; Gothic
0x10350, // unassigned
0x10380, // 10380..1039F; Ugaritic
0x103A0, // 103A0..103DF; Old Persian
0x103E0, // unassigned
0x10400, // 10400..1044F; Deseret
0x10450, // 10450..1047F; Shavian
0x10480, // 10480..104AF; Osmanya
0x104B0, // unassigned
0x10800, // 10800..1083F; Cypriot Syllabary
0x10840, // 10840..1085F; Imperial Aramaic
0x10860, // unassigned
0x10900, // 10900..1091F; Phoenician
0x10920, // 10920..1093F; Lydian
0x10940, // unassigned
0x10980, // 10980..1099F; Meroitic Hieroglyphs
0x109A0, // 109A0..109FF; Meroitic Cursive
0x10A00, // 10A00..10A5F; Kharoshthi
0x10A60, // 10A60..10A7F; Old South Arabian
0x10A80, // unassigned
0x10B00, // 10B00..10B3F; Avestan
0x10B40, // 10B40..10B5F; Inscriptional Parthian
0x10B60, // 10B60..10B7F; Inscriptional Pahlavi
0x10B80, // unassigned
0x10C00, // 10C00..10C4F; Old Turkic
0x10C50, // unassigned
0x10E60, // 10E60..10E7F; Rumi Numeral Symbols
0x10E80, // unassigned
0x11000, // 11000..1107F; Brahmi
0x11080, // 11080..110CF; Kaithi
0x110D0, // 110D0..110FF; Sora Sompeng
0x11100, // 11100..1114F; Chakma
0x11150, // unassigned
0x11180, // 11180..111DF; Sharada
0x111E0, // unassigned
0x11680, // 11680..116CF; Takri
0x116D0, // unassigned
0x12000, // 12000..123FF; Cuneiform
0x12400, // 12400..1247F; Cuneiform Numbers and Punctuation
0x12480, // unassigned
0x13000, // 13000..1342F; Egyptian Hieroglyphs
0x13430, // unassigned
0x16800, // 16800..16A3F; Bamum Supplement
0x16A40, // unassigned
0x16F00, // 16F00..16F9F; Miao
0x16FA0, // unassigned
0x1B000, // 1B000..1B0FF; Kana Supplement
0x1B100, // unassigned
0x1D000, // 1D000..1D0FF; Byzantine Musical Symbols
0x1D100, // 1D100..1D1FF; Musical Symbols
0x1D200, // 1D200..1D24F; Ancient Greek Musical Notation
0x1D250, // unassigned
0x1D300, // 1D300..1D35F; Tai Xuan Jing Symbols
0x1D360, // 1D360..1D37F; Counting Rod Numerals
0x1D380, // unassigned
0x1D400, // 1D400..1D7FF; Mathematical Alphanumeric Symbols
0x1D800, // unassigned
0x1EE00, // 1EE00..1EEFF; Arabic Mathematical Alphabetic Symbols
0x1EF00, // unassigned
0x1F000, // 1F000..1F02F; Mahjong Tiles
0x1F030, // 1F030..1F09F; Domino Tiles
0x1F0A0, // 1F0A0..1F0FF; Playing Cards
0x1F100, // 1F100..1F1FF; Enclosed Alphanumeric Supplement
0x1F200, // 1F200..1F2FF; Enclosed Ideographic Supplement
0x1F300, // 1F300..1F5FF; Miscellaneous Symbols And Pictographs
0x1F600, // 1F600..1F64F; Emoticons
0x1F650, // unassigned
0x1F680, // 1F680..1F6FF; Transport And Map Symbols
0x1F700, // 1F700..1F77F; Alchemical Symbols
0x1F780, // unassigned
0x20000, // 20000..2A6DF; CJK Unified Ideographs Extension B
0x2A6E0, // unassigned
0x2A700, // 2A700..2B73F; CJK Unified Ideographs Extension C
0x2B740, // 2B740..2B81F; CJK Unified Ideographs Extension D
0x2B820, // unassigned
0x2F800, // 2F800..2FA1F; CJK Compatibility Ideographs Supplement
0x2FA20, // unassigned
0xE0000, // E0000..E007F; Tags
0xE0080, // unassigned
0xE0100, // E0100..E01EF; Variation Selectors Supplement
0xE01F0, // unassigned
0xF0000, // F0000..FFFFF; Supplementary Private Use Area-A
0x100000 // 100000..10FFFF; Supplementary Private Use Area-B
};
/**
* unicode代码块数组
*/
private static final Character.UnicodeBlock[] blocks = {
BASIC_LATIN,
LATIN_1_SUPPLEMENT,
LATIN_EXTENDED_A,
LATIN_EXTENDED_B,
IPA_EXTENSIONS,
SPACING_MODIFIER_LETTERS,
COMBINING_DIACRITICAL_MARKS,
GREEK,
CYRILLIC,
CYRILLIC_SUPPLEMENTARY,
ARMENIAN,
HEBREW,
ARABIC,
SYRIAC,
ARABIC_SUPPLEMENT,
THAANA,
NKO,
SAMARITAN,
MANDAIC,
null,
ARABIC_EXTENDED_A,
DEVANAGARI,
BENGALI,
GURMUKHI,
GUJARATI,
ORIYA,
TAMIL,
TELUGU,
KANNADA,
MALAYALAM,
SINHALA,
THAI,
LAO,
TIBETAN,
MYANMAR,
GEORGIAN,
HANGUL_JAMO,
ETHIOPIC,
ETHIOPIC_SUPPLEMENT,
CHEROKEE,
UNIFIED_CANADIAN_ABORIGINAL_SYLLABICS,
OGHAM,
RUNIC,
TAGALOG,
HANUNOO,
BUHID,
TAGBANWA,
KHMER,
MONGOLIAN,
UNIFIED_CANADIAN_ABORIGINAL_SYLLABICS_EXTENDED,
LIMBU,
TAI_LE,
NEW_TAI_LUE,
KHMER_SYMBOLS,
BUGINESE,
TAI_THAM,
null,
BALINESE,
SUNDANESE,
BATAK,
LEPCHA,
OL_CHIKI,
null,
SUNDANESE_SUPPLEMENT,
VEDIC_EXTENSIONS,
PHONETIC_EXTENSIONS,
PHONETIC_EXTENSIONS_SUPPLEMENT,
COMBINING_DIACRITICAL_MARKS_SUPPLEMENT,
LATIN_EXTENDED_ADDITIONAL,
GREEK_EXTENDED,
GENERAL_PUNCTUATION,
SUPERSCRIPTS_AND_SUBSCRIPTS,
CURRENCY_SYMBOLS,
COMBINING_MARKS_FOR_SYMBOLS,
LETTERLIKE_SYMBOLS,
NUMBER_FORMS,
ARROWS,
MATHEMATICAL_OPERATORS,
MISCELLANEOUS_TECHNICAL,
CONTROL_PICTURES,
OPTICAL_CHARACTER_RECOGNITION,
ENCLOSED_ALPHANUMERICS,
BOX_DRAWING,
BLOCK_ELEMENTS,
GEOMETRIC_SHAPES,
MISCELLANEOUS_SYMBOLS,
DINGBATS,
MISCELLANEOUS_MATHEMATICAL_SYMBOLS_A,
SUPPLEMENTAL_ARROWS_A,
BRAILLE_PATTERNS,
SUPPLEMENTAL_ARROWS_B,
MISCELLANEOUS_MATHEMATICAL_SYMBOLS_B,
SUPPLEMENTAL_MATHEMATICAL_OPERATORS,
MISCELLANEOUS_SYMBOLS_AND_ARROWS,
GLAGOLITIC,
LATIN_EXTENDED_C,
COPTIC,
GEORGIAN_SUPPLEMENT,
TIFINAGH,
ETHIOPIC_EXTENDED,
CYRILLIC_EXTENDED_A,
SUPPLEMENTAL_PUNCTUATION,
CJK_RADICALS_SUPPLEMENT,
KANGXI_RADICALS,
null,
IDEOGRAPHIC_DESCRIPTION_CHARACTERS,
CJK_SYMBOLS_AND_PUNCTUATION,
HIRAGANA,
KATAKANA,
BOPOMOFO,
HANGUL_COMPATIBILITY_JAMO,
KANBUN,
BOPOMOFO_EXTENDED,
CJK_STROKES,
KATAKANA_PHONETIC_EXTENSIONS,
ENCLOSED_CJK_LETTERS_AND_MONTHS,
CJK_COMPATIBILITY,
CJK_UNIFIED_IDEOGRAPHS_EXTENSION_A,
YIJING_HEXAGRAM_SYMBOLS,
CJK_UNIFIED_IDEOGRAPHS,
YI_SYLLABLES,
YI_RADICALS,
LISU,
VAI,
CYRILLIC_EXTENDED_B,
BAMUM,
MODIFIER_TONE_LETTERS,
LATIN_EXTENDED_D,
SYLOTI_NAGRI,
COMMON_INDIC_NUMBER_FORMS,
PHAGS_PA,
SAURASHTRA,
DEVANAGARI_EXTENDED,
KAYAH_LI,
REJANG,
HANGUL_JAMO_EXTENDED_A,
JAVANESE,
null,
CHAM,
MYANMAR_EXTENDED_A,
TAI_VIET,
MEETEI_MAYEK_EXTENSIONS,
ETHIOPIC_EXTENDED_A,
null,
MEETEI_MAYEK,
HANGUL_SYLLABLES,
HANGUL_JAMO_EXTENDED_B,
HIGH_SURROGATES,
HIGH_PRIVATE_USE_SURROGATES,
LOW_SURROGATES,
PRIVATE_USE_AREA,
CJK_COMPATIBILITY_IDEOGRAPHS,
ALPHABETIC_PRESENTATION_FORMS,
ARABIC_PRESENTATION_FORMS_A,
VARIATION_SELECTORS,
VERTICAL_FORMS,
COMBINING_HALF_MARKS,
CJK_COMPATIBILITY_FORMS,
SMALL_FORM_VARIANTS,
ARABIC_PRESENTATION_FORMS_B,
HALFWIDTH_AND_FULLWIDTH_FORMS,
SPECIALS,
LINEAR_B_SYLLABARY,
LINEAR_B_IDEOGRAMS,
AEGEAN_NUMBERS,
ANCIENT_GREEK_NUMBERS,
ANCIENT_SYMBOLS,
PHAISTOS_DISC,
null,
LYCIAN,
CARIAN,
null,
OLD_ITALIC,
GOTHIC,
null,
UGARITIC,
OLD_PERSIAN,
null,
DESERET,
SHAVIAN,
OSMANYA,
null,
CYPRIOT_SYLLABARY,
IMPERIAL_ARAMAIC,
null,
PHOENICIAN,
LYDIAN,
null,
MEROITIC_HIEROGLYPHS,
MEROITIC_CURSIVE,
KHAROSHTHI,
OLD_SOUTH_ARABIAN,
null,
AVESTAN,
INSCRIPTIONAL_PARTHIAN,
INSCRIPTIONAL_PAHLAVI,
null,
OLD_TURKIC,
null,
RUMI_NUMERAL_SYMBOLS,
null,
BRAHMI,
KAITHI,
SORA_SOMPENG,
CHAKMA,
null,
SHARADA,
null,
TAKRI,
null,
CUNEIFORM,
CUNEIFORM_NUMBERS_AND_PUNCTUATION,
null,
EGYPTIAN_HIEROGLYPHS,
null,
BAMUM_SUPPLEMENT,
null,
MIAO,
null,
KANA_SUPPLEMENT,
null,
BYZANTINE_MUSICAL_SYMBOLS,
MUSICAL_SYMBOLS,
ANCIENT_GREEK_MUSICAL_NOTATION,
null,
TAI_XUAN_JING_SYMBOLS,
COUNTING_ROD_NUMERALS,
null,
MATHEMATICAL_ALPHANUMERIC_SYMBOLS,
null,
ARABIC_MATHEMATICAL_ALPHABETIC_SYMBOLS,
null,
MAHJONG_TILES,
DOMINO_TILES,
PLAYING_CARDS,
ENCLOSED_ALPHANUMERIC_SUPPLEMENT,
ENCLOSED_IDEOGRAPHIC_SUPPLEMENT,
MISCELLANEOUS_SYMBOLS_AND_PICTOGRAPHS,
EMOTICONS,
null,
TRANSPORT_AND_MAP_SYMBOLS,
ALCHEMICAL_SYMBOLS,
null,
CJK_UNIFIED_IDEOGRAPHS_EXTENSION_B,
null,
CJK_UNIFIED_IDEOGRAPHS_EXTENSION_C,
CJK_UNIFIED_IDEOGRAPHS_EXTENSION_D,
null,
CJK_COMPATIBILITY_IDEOGRAPHS_SUPPLEMENT,
null,
TAGS,
null,
VARIATION_SELECTORS_SUPPLEMENT,
null,
SUPPLEMENTARY_PRIVATE_USE_AREA_A,
SUPPLEMENTARY_PRIVATE_USE_AREA_B
};
/**
* 返回包含指定char的Unicode块，
* 不过这个方法不能处理增补characters。如果要处理增补的药直接调用of方法。
*/
public static Character.UnicodeBlock of(char c) {
return of((int) c);
}
/**
* 返回包含指定char的Unicode块
*
* @since 1.5
*/
public static Character.UnicodeBlock of(int codePoint) {
if (!isValidCodePoint(codePoint)) {
throw new IllegalArgumentException();
}
int top, bottom, current;
bottom = 0;
top = blockStarts.length;
current = top / 2;
// 二分查找
// invariant: top > current >= bottom && codePoint >= unicodeBlockStarts[bottom]
while (top - bottom > 1) {
if (codePoint >= blockStarts[current]) {
bottom = current;
} else {
top = current;
}
current = (top + bottom) / 2;
}
return blocks[current];
}
/**
* 通过给定的标识符返回unicode块
*
* @since 1.5
*/
public static final Character.UnicodeBlock forName(String blockName) {
Character.UnicodeBlock block = map.get(blockName.toUpperCase(Locale.US));
if (block == null) {
throw new IllegalArgumentException();
}
return block;
}
}
}