Java tutorial
//package com.java2s; import java.util.regex.Matcher; import java.util.regex.Pattern; public class Main { public static boolean isEmail(String emailStr) { String patternStr = "\\w+([-+.]\\w+)*@\\w+([-.]\\w+)*\\.\\w+([-.]\\w+)*"; Pattern p = Pattern.compile(patternStr); Matcher m = p.matcher(emailStr); return m.matches(); } }