Java tutorial
//package com.java2s; public class Main { public static boolean isValidEmail(String email) { String tokens[] = email.split("@"); if (tokens.length != 2 || tokens[0].length() == 0 || tokens[1].length() == 0) return false; tokens = tokens[1].split("\\."); if (tokens.length != 2 || tokens[0].length() == 0 || tokens[1].length() == 0) return false; return true; } }