Java tutorial
//package com.java2s; import java.util.regex.Matcher; import java.util.regex.Pattern; public class Main { public static Boolean validEmail(String email) { String regex = "^[a-z0-9A-Z_-]+@[a-z0-9A-Z_-]+(\\.[a-z0-9A-Z_-]+)+$"; Pattern pattern = Pattern.compile(regex); Matcher matcher = pattern.matcher(email); return matcher.matches(); } }