Java tutorial
//package com.java2s; import java.util.regex.Matcher; import java.util.regex.Pattern; public class Main { public static boolean isPhoneNum(String phonenum) { Pattern pattern = Pattern.compile("^(1[0-9])\\d{9}$"); Matcher m = pattern.matcher(phonenum); if (m.matches()) { return true; } else { return false; } } }