Java HTTP Port Find getFreePortNumber(int defaultPortNumber)

Description

get Free Port Number

License

Apache License

Declaration

public static int getFreePortNumber(int defaultPortNumber) 

Method Source Code

//package com.java2s;
/*// ww  w .  j  a v  a2s . c om
 * #%L
 * messaging-client-scribe
 * %%
 * Copyright (C) 2012 - 2014 InMobi
 * %%
 * 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.
 * #L%
 */

import java.io.IOException;
import java.net.ServerSocket;

public class Main {
    public static int getFreePortNumber(int defaultPortNumber) {
        int port = defaultPortNumber;
        ServerSocket socket = null;
        try {
            socket = new ServerSocket(0);
            port = socket.getLocalPort();
        } catch (IOException e) {
            System.out.println("IOException occured while creating socket." + " Use a default port number " + port);
        } finally {
            try {
                if (socket != null) {
                    socket.close();
                }
            } catch (IOException e) {
                return defaultPortNumber;
            }
        }
        return port;
    }
}

Related

1. getFreePort()
2. getFreePort()
3. getFreePort(int port)
4. getFreePort(int pPort)
5. getFreePortNoSych()
6. getFreeServerPort(int port)
7. getImportedXmlSchemaPath(String namespace, String portType, String operation)
8. getNextAvailable(int port)
9. getNextAvailablePort()