Here you can find the source of isEmail(String strEmail)
public static boolean isEmail(String strEmail)
//package com.java2s; import java.util.regex.Matcher; import java.util.regex.Pattern; public class Main { public static boolean isEmail(String strEmail) { String strPattern = "[a-zA-Z0-9_-]+@\\w+\\.[a-z]+(\\.[a-z]+)*"; Pattern p = Pattern.compile(strPattern); Matcher m = p.matcher(strEmail); return m.matches(); }//from w w w. j a va 2 s.co m }