java 判断是否中文字符

package test;import java.util.Random;public class IsChineseOrEnglish {//  GENERAL_PUNCTUATION 判断中文的“号//  CJK_SYMBOLS_AND_PUNCTUATION 判断中文的。号//  HALFWIDTH_AND_FULLWIDTH_FORMS 判断中文的，号public static boolean isChinese(char c) {Character.UnicodeBlock ub = Character.UnicodeBlock.of(c);if (ub == Character.UnicodeBlock.CJK_UNIFIED_IDEOGRAPHS|| ub == Character.UnicodeBlock.CJK_COMPATIBILITY_IDEOGRAPHS|| ub == Character.UnicodeBlock.CJK_UNIFIED_IDEOGRAPHS_EXTENSION_A|| ub == Character.UnicodeBlock.GENERAL_PUNCTUATION|| ub == Character.UnicodeBlock.CJK_SYMBOLS_AND_PUNCTUATION|| ub == Character.UnicodeBlock.HALFWIDTH_AND_FULLWIDTH_FORMS) {return true;}return false;}public static void isChinese(String strName) {char[] ch = strName.toCharArray();for (int i = 0; i < ch.length; i++) {char c = ch[i];if (isChinese(c) == true) {System.out.println(isChinese(c));return;} else {System.out.println(isChinese(c));return;}}}public static void main(String[] args) {        Random r = new Random();        for(int i=0;i<20;i++)        System.out.println(r.nextInt(10)+1);isChinese("き");isChinese("中国");}}