java判断string字符串中是否存在汉字

public class IsHaveHanZi {

public static boolean isHaveHanZi(String str){

boolean flag=true;

int count = 0;

String regEx = '[\\u4e00-\\u9fa5]';

Pattern p = Pattern.compile(regEx);

Matcher m = p.matcher(str);

while (m.find()) {

for (int i = 0; i <= m.groupCount(); i++) {

count = count + 1;

}

}

if(count==0){

flag=false;

}

return flag;

}

public static void main(String[] args) {

System.out.println(isHaveHanZi('我是sssss'));

}

}