Java tutorial
//package com.java2s; //License from project: Apache License import java.util.regex.Matcher; import java.util.regex.Pattern; public class Main { public static boolean isMobileNO(String mobiles) { // Pattern p = // Pattern.compile("^((13[0-9])|(15[^4,\\D])|(18[0,1,2,5-9]))\\d{8}$"); Pattern p = Pattern.compile("^([0-9]{3})\\d{8}$"); Matcher m = p.matcher(mobiles); return m.matches(); } }