Java HTTP Port Find availablePort()

Here you can find the source of availablePort()

Description

Will determine the available port

License

Apache License

Declaration

public final static int availablePort() 

Method Source Code


//package com.java2s;
/*//from  w w  w  .j av  a 2  s  .c o  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.ServerSocket;

public class Main {
    /**
     * Will determine the available port
     */
    public final static int availablePort() {
        ServerSocket s = null;
        try {
            s = new ServerSocket(0);
            s.setReuseAddress(true);
            return s.getLocalPort();
        } catch (Exception e) {
            throw new IllegalStateException("Failed to discover available port.", e);
        } finally {
            try {
                s.close();
            } catch (IOException e) {
                // ignore
            }
        }
    }
}

Related

  1. available(int port)
  2. available(int port)
  3. available(int port)
  4. available_port()
  5. availableAndReturn(int MIN_PORT_NUMBER, int MAX_PORT_NUMBER)
  6. availablePort(int port)
  7. availablePort(int pPort)
  8. availablePort(int prefered)
  9. canConnect(String host, int port)