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 isEmail(String email) { if ((email == null) || (email.trim().equals(""))) { return false; } String emailRegular = "^([a-z0-9A-Z]+[-|\\.]?)+[a-z0-9A-Z]@([a-z0-9A-Z]+(-[a-z0-9A-Z]+)?\\.)+[a-zA-Z]{2,}$"; Pattern regex = Pattern.compile(emailRegular); Matcher matcher = regex.matcher(email); boolean isMatched = matcher.matches(); return isMatched; } }