Java HTTP Port Find isFreePort(int portNumber)

Description

Checks whether the given TCP port is available.

License

Apache License

Declaration

public static boolean isFreePort(int portNumber) 

Method Source Code

//package com.java2s;
/*-------------------------------------------------------------------------+
|                                                                          |
| Copyright 2005-2011 The ConQAT Project                                   |
|                                                                          |
| 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 {
    /** Checks whether the given TCP port is available. */
    public static boolean isFreePort(int portNumber) {
        try {//w  w  w  . j a v a  2s  .co  m
            ServerSocket socket = new ServerSocket(portNumber);
            socket.setReuseAddress(true);
            socket.close();
            return true;
        } catch (IOException e) {
            return false;
        }
    }
}

Related

1. isBindable(int port)
2. isBindedPort(String host, int port)
3. isBound(int port)
4. isBound(int port)
5. isConnectionAlive(String protocol, String host, int port)
6. isFreeTCPPort(final int port)
7. isHostAvailable(final String host, final int port)
8. isHostReachable(String host, int port, int connTimeout)
9. isListening(String host, int port)