Here you can find the source of getResponseCode(String URL)
public static int getResponseCode(String URL) throws Exception
//package com.java2s; /******************************************************************************* * Copyright 2014 United States Government as represented by the * Administrator of the National Aeronautics and Space Administration. * All Rights Reserved.//from w ww .ja v a 2 s. c o m * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. ******************************************************************************/ import java.net.HttpURLConnection; import java.net.URL; public class Main { public static int getResponseCode(String URL) throws Exception { int connectionTimeoutInMS = 3000; int socketOperationsTimeoutInMS = 3000; HttpURLConnection conn = null; URL testUrl = new URL(URL); conn = (HttpURLConnection) testUrl.openConnection(); conn.setConnectTimeout(connectionTimeoutInMS); conn.setReadTimeout(socketOperationsTimeoutInMS); conn.setRequestMethod("HEAD"); int responseCode = conn.getResponseCode(); return responseCode; } }