Java method to determine whether a character is a Chinese character

1. The encoding range of Chinese characters: [\u4e00-\u9fa5] (Recommended java related video tutorials: java video tutorial)

The following method determines whether a character is a Chinese character

//如果是一个汉字返回true，否则返回falsepublic static boolean checkCharCN(char c){
        String s = String.valueOf(c);
        String  regex = "[\u4e00-\u9fa5]";
        Pattern p = Pattern.compile(regex);
        Matcher m = p.matcher(s);
        return m.matches();
    }

Java uses Unicode encoding. The range of char type variables is 0-65535. The unsigned value can represent 65536 characters. Basically, characters on the earth can be All including

Chinese characters are basically concentrated between [19968, 40869], a total of 20901 Chinese characters

unicode encoding range:

Chinese characters: [0x4e00,0x9fa5] (or Decimal [19968, 40869])

Numbers: [0x30,0x39] (or decimal [48, 57])

Lowercase letters: [0x61,0x7a] (or decimal [97, 122 ])

Capital letters: [0x41,0x5a] (or decimal [65, 90])

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