Java tutorial
//package com.java2s; import java.util.regex.Matcher; import java.util.regex.Pattern; public class Main { public static boolean checkPhoneNumber(String number) { if (number.equals("") || number.length() != 11) { return false; } Pattern pattern = Pattern.compile("^((13[0-9])|(15[0-9])|(18[0-9])|(17[6-8])|(14[5,7]))\\d{8}$"); Matcher matcher = pattern.matcher(number); if (matcher.matches()) { return true; } else { return false; } } }