Java tutorial
//package com.java2s; //License from project: Open Source License import java.util.regex.Matcher; import java.util.regex.Pattern; public class Main { public static boolean isMobileNO(String mobileNo) { if (null == mobileNo || mobileNo.length() != 11) return false; Pattern p = Pattern.compile("^((13[0-9])|(15[^4,\\D])|(18[0,5-9]))\\d{8}$"); Matcher m = p.matcher(mobileNo); return m.matches(); } }