Java realizes Chinese character judgment + chinese symbol judgment __character

Java General Chinese judgments are based on regular expressions

Pattern pattern = Pattern.compile ("[\u4e00-\u9fcc]+");
SYSTEM.OUT.PRINTLN (Pattern.matcher (str). find ());

Or

System.out.println (Str.matches ("[\u4e00-\u9fcc]+"));

this way there will be some obscure Chinese characters can not be recognized, but also can not match the Chinese symbols such as "",;

in Java, the main use of the character class is to handle character-related functions, using the internal classes it provides to determine Chinese

1.character.unicodeblock

Judging Chinese characters:

private static Boolean Ischinesebyblock (char c) {
		Character.unicodeblock UB = Character.UnicodeBlock.of (c);
		if (UB = = Character.UnicodeBlock.CJK_UNIFIED_IDEOGRAPHS
				| | ub = = Character.UnicodeBlock.CJK_UNIFIED_IDEOGRAPHS_ Extension_a
				| | ub = = Character.UnicodeBlock.CJK_UNIFIED_IDEOGRAPHS_EXTENSION_B
				| | ub = = character.unicodeblock.cjk_unified_ideographs_extension_c//jdk1.7
				| | ub = = Character.UnicodeBlock.CJK_UNIFIED _ideographs_extension_d//jdk1.7
				| | ub = = Character.UnicodeBlock.CJK_COMPATIBILITY_IDEOGRAPHS
				| | ub = = Character.UnicodeBlock.CJK_COMPATIBILITY_IDEOGRAPHS_SUPPLEMENT) {return
			true;
		}
		return false;
	}

Judging Chinese symbols:

private static Boolean ischinesepuctuation (char c) {
		Character.unicodeblock UB = Character.UnicodeBlock.of (c);
		if (UB = = Character.UnicodeBlock.GENERAL_PUNCTUATION
                | | ub = = Character.UnicodeBlock.CJK_SYMBOLS_AND_PUNCTUATION | |
                | ub = = Character.UnicodeBlock.HALFWIDTH_AND_FULLWIDTH_FORMS
                | | UB = = Character.UnicodeBlock.CJK_COMPATIBILITY_FORMS
                | | ub = = Character.UnicodeBlock.VERTICAL_FORMS) {//jdk1.7 return
			true;
		}
		return false;
	}

2.character.unicodescript (jdk1.7 only available)

Character.unicodescript provides a more concise way of judging Chinese characters:

private static Boolean ischinesebyscript (char c) {
		Character.unicodescript sc = Character.UnicodeScript.of (c);
        if (sc = = Character.UnicodeScript.HAN) {return
        	true;
        }
        return false;
	}