Java tutorial
//package com.java2s; import java.util.regex.Matcher; import java.util.regex.Pattern; public class Main { public static boolean checkEmail(String s) { String check = "^([a-z0-9A-Z_-]+[-|\\.]?)+[a-z0-9A-Z_]@([a-z0-9A-Z_]+(-[a-z0-9A-Z_]+)?\\.)+[a-zA-Z\\.]{2,}$"; Pattern regex = Pattern.compile(check); Matcher matcher = regex.matcher(s); return matcher.matches(); } }