Java URL Connection isOnline(String url)

Description

Verifies if the specified URL is reachable online.

License

Apache License

Parameter

Parameter	Description
url	input URL.

Exception

Parameter	Description
MalformedURLException	if <code>url</code> is malformed.

Return

true if the resource can be accessed, false otherwise.

Declaration

public static boolean isOnline(String url) throws MalformedURLException 

Method Source Code

//package com.java2s;
/*// w ww  . jav  a  2  s  .c  o  m
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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.io.IOException;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLConnection;

public class Main {
    /**
     * Verifies if the specified URL is reachable online.
     *
     * @param url input URL.
     * @return <code>true</code> if the resource can be accessed, <code>false</code> otherwise.
     * @throws MalformedURLException if <code>url</code> is malformed.
     */
    public static boolean isOnline(String url) throws MalformedURLException {
        try {
            final URLConnection connection = new URL(url).openConnection();
            connection.getInputStream().close();
            return true;
        } catch (IOException ioe) {
            if (ioe instanceof MalformedURLException) {
                throw (MalformedURLException) ioe;
            }
            return false;
        }
    }
}

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