How to determine whether a character is a Chinese character in java

Java determines whether a character is a Chinese character implementation code: (Recommended : java video tutorial )

 /**
     * 判断一个字符是否是汉字
     * PS：中文汉字的编码范围：[\u4e00-\u9fa5]
     *
     * @param c 需要判断的字符
     * @return 是汉字(true), 不是汉字(false)
     */
    public static boolean isChineseChar(char c) { 
           return String.valueOf(c).matches("[\u4e00-\u9fa5]");
    }

Example:

/**
 * 判断一个字符是否是汉字
 *
 * @author Yawei Xi
 * @date 2018-8-20
 */
public class Test {
    public static void main(String[] args) {
        char a = ' ';
        char b = 0;
        char c = 'a';
        char d = '中';

        System.out.println(isChineseChar(a));
        System.out.println(isChineseChar(b));
        System.out.println(isChineseChar(c));
        System.out.println(isChineseChar(d));
    }

    /**
     * 判断一个字符是否是汉字
     * PS：中文汉字的编码范围：[\u4e00-\u9fa5]
     *
     * @param c 需要判断的字符
     * @return 是汉字(true), 不是汉字(false)
     */
    public static boolean isChineseChar(char c) {
        return String.valueOf(c).matches("[\u4e00-\u9fa5]");
    }
}

Output result:

false
false
false
true

Java uses Unicode encoding. The range of char type variables is 0-65535. Unsigned values ​​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])

Double-byte character encoding range

1.GBK (GB2312/GB18030)

/x00-/xff GBK double-byte encoding range

/x20-/x7f ASCII

/xa1-/xff Chinese gb2312

/x80-/xff Chinese gbk

2.UTF-8 ( Unicode)

/u4e00-/u9fa5 (Chinese)

For more java knowledge, please pay attention to the java basic tutorial column.

The above is the detailed content of How to determine whether a character is a Chinese character in java. For more information, please follow other related articles on the PHP Chinese website!