Java tutorial
//package com.java2s; import java.util.regex.Matcher; import java.util.regex.Pattern; public class Main { public static boolean isEmailAddress(String email) { Pattern pattern = Pattern .compile("^[_A-Za-z0-9-]+(\\.[_A-Za-z0-9-]+)*@[A-Za-z0-9]+(\\.[A-Za-z0-9]+)*(\\.[A-Za-z]{2,})$"); // .compile("^/w+([-.]/w+)*@/w+([-]/w+)*/.(/w+([-]/w+)*/.)*[a-z]{2,3}$"); Matcher matcher = pattern.matcher(email); return matcher.matches(); } }