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