public class test {
 public static void main(String[] args) {
  String a = "中国China";
  for (int i=a.length(); --i>=0;) {
   String b = a.substring(i, i+1);
   boolean c = java.util.regex.Pattern.matches("[\u4E00-\u9FA5]", b);
   if(c) {
    System.out.println("此字符串包含中文");
    break;
   }
  }
 }
}