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