Java 判断是否是中文字符

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");
}

}