Java HTTP Port Find isPortAvailable(String hostName, int port)

Description

is Port Available

License

Apache License

Declaration

public static boolean isPortAvailable(String hostName, int port) 

Method Source Code

//package com.java2s;
/*/*from www  .  j a v  a  2s. co 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.InetSocketAddress;
import java.net.ServerSocket;

public class Main {
    public static boolean isPortAvailable(String hostName, int port) {
        InetSocketAddress socketAddress = null;
        if (hostName == null || "".equals(hostName) || "*".equals(hostName)) {
            socketAddress = new InetSocketAddress(port);
        } else {
            socketAddress = new InetSocketAddress(hostName, port);
        }

        ServerSocket serverSocket = null;
        try {
            serverSocket = new ServerSocket();
            serverSocket.setReuseAddress(true);
            serverSocket.bind(socketAddress);
            return true;
        } catch (IOException e) {
            return false;
        } finally {
            if (serverSocket != null) {
                try {
                    serverSocket.close();
                } catch (IOException e) {
                    throw new RuntimeException(
                            "Couldn't close port " + port + " that was created to check its availability", e);
                }
            }
        }
    }
}

Related

1. isPortAvailable(String host, int port)
2. isPortAvailable(String host, int port)
3. isPortAvailable(String host, int port)
4. isPortAvailable(String hostname, int port)
5. isPortAvailable(String hostname, int port)
6. isPortAvailable(String portNumber)
7. isPortBound(int port)
8. isPortFree(int port)
9. isPortFree(int port)