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