Java tutorial
//package com.java2s; import java.util.regex.Matcher; import java.util.regex.Pattern; public class Main { public static boolean isEmail(String email) { if (null == email) return false; // Pattern p = Pattern.compile("\\w+@(\\w+.)+[a-z]{2,3}"); Pattern p = Pattern.compile("\\w+([-+.]\\w+)*@\\w+([-.]\\w+)*\\.\\w+([-.]\\w+)*"); Matcher m = p.matcher(email); return m.matches(); } }