Java HTTP Port Find isPortFree(int portNumber)

Description

Checks to see if the port is available.

License

Apache License

Return

true if the port is available

Declaration

static public boolean isPortFree(int portNumber) 

Method Source Code

//package com.java2s;
/*/*w  w  w  .j a v a  2s .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.Socket;
import java.net.UnknownHostException;

public class Main {
    /**
     * Checks to see if the port is available. 
     * @return true if the port is available
     */
    static public boolean isPortFree(int portNumber) {
        try {
            Socket echoSocket = new Socket("localhost", portNumber);
            echoSocket.close();
            return false;
        } catch (UnknownHostException e) {
            return true;

        } catch (IOException e) {
            return true;

        }

    }
}

Related

1. isPortAvailable(String hostname, int port)
2. isPortAvailable(String portNumber)
3. isPortBound(int port)
4. isPortFree(int port)
5. isPortFree(int port)
6. isPortFree(String hostName, String port)
7. isPortFreeClient(String hostName, int portNumber)
8. isPortInUse(final String host, final Integer port)
9. isPortInUse(int port)