Java tutorial
//package com.java2s; import java.util.regex.Matcher; import java.util.regex.Pattern; public class Main { public static boolean isPhoneNumber(String number) { String regulation = "^((11[0-9])|(12[0-9])|(13[0-9])|(14[0-9])|(15[0-9])|(16[0-9])|(17[0-9])|(18[0-9])|(19[0-9])|)//d{8}$"; Pattern pattern = Pattern.compile(regulation); Matcher matcher = pattern.matcher(number); if (matcher.matches()) { return true; } return false; } }