1 package cn.check.com; 2 3 import java.util.Scanner; 4 5 public class CheckQQDemo2 { 6 7 public static void main(String[] args) { 8 // TODO Auto-generated method stub 9 Scanner sc=new Scanner(System.in); 10 System.out.println("请输入:"); 11 String ss=sc.nextLine(); 12 System.out.println(checkqq(ss)); 13 14 15 } 16 public static boolean checkqq(String qq){ 17 String regex="[1-9][0-9]{4,14}";//正则表达式 18 19 return qq.matches(regex); 20 } 21 }