Java HTTP Port Find getFreePort()

Description

Returns the next available port number on the local host.

License

Open Source License

Declaration

public static int getFreePort() 

Method Source Code

//package com.java2s;
/*******************************************************************************
 * Copyright (c) 2000, 2015 IBM Corporation and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors://w  w  w .j  a va  2  s  .  c  o m
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/

import java.io.IOException;

import java.net.ServerSocket;

public class Main {
    /**
     * Returns the next available port number on the local host.
     */
    public static int getFreePort() {
        ServerSocket socket = null;
        try {
            socket = new ServerSocket(0);
            return socket.getLocalPort();
        } catch (IOException e) {
            // ignore
        } finally {
            if (socket != null) {
                try {
                    socket.close();
                } catch (IOException e) {
                    // ignore
                }
            }
        }
        return -1;
    }
}

Related

1. getFreeLocalPort()
2. getFreePort()
3. getFreePort()
4. getFreePort()
5. getFreePort()
6. getFreePort()
7. getFreePort()
8. getFreePort()
9. getFreePort()