Java 判斷一個字符串中有幾個漢字

public static void main(String[] args) {
int count = 0;
String regEx = "[\\u4e00-\\u9fa5]";
String str = "AQWASD我們都是好孩子AAAA11222 ";
Pattern p = Pattern.compile(regEx);
Matcher m = p.matcher(str);
while (m.find()) {
for (int i = 0; i <= m.groupCount(); i++) {
count = count + 1;
}
}
System.out.println("共有 " + count + "個 ");
}

}