Java HTTP Port Find findAvailablePort()

Description

Finds the first available TCP server port.

License

Apache License

Exception

Parameter	Description
IOException	an exception

Return

first available TCP server port number.

Declaration

public static int findAvailablePort() throws IOException 

Method Source Code

//package com.java2s;
/*/*from w ww.ja  va2s . c o m*/
 * ================================================================================================
 * Awesome Agile
 * %%
 * Copyright (C) 2015 Mark Warren, Phillip Heller, Matt Kubej, Linghong Chen, Stanislav Belov, Qanit Al
 * %%
 * 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.io.IOException;
import java.net.ServerSocket;

public class Main {
    /**
     * Finds the first available TCP server port.
     * @return first available TCP server port number.
     * @throws IOException
     */
    public static int findAvailablePort() throws IOException {
        ServerSocket serverSocket = null;
        try {
            serverSocket = new ServerSocket(0);
            return serverSocket.getLocalPort();
        } finally {
            if (serverSocket != null) {
                serverSocket.close();
            }
        }
    }
}

Related

1. doSend(String command, String server, String port)
2. executeHttpCommand(String host, int port, String request, String charset)
3. exportResource(Class fromClass, String resourceName, String exportPath)
4. findAvailablePort()
5. findAvailablePort()
6. findAvailablePort(int min, int max)
7. findAvailablePort(int minPort, int maxPort)
8. findAvailablePort(int port)
9. findAvailablePort(int port)