Java HTTP Port Find isPortAvailable(int port)

Description

Check if port is available

License

Apache License

Parameter

Parameter	Description
port	a parameter

Declaration

private static boolean isPortAvailable(int port) 

Method Source Code

//package com.java2s;
/*/*from  ww w  . j  a v a  2s.co  m*/
 * Copyright 2002-2011 the original author or authors, or Red-Black IT Ltd, as appropriate.
 *
 * 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.InetSocketAddress;
import java.net.ServerSocket;

public class Main {
    /**
     * Check if port is available
     * 
     * @param port
     * @return
     */
    private static boolean isPortAvailable(int port) {
        ServerSocket serverSocket;
        try {
            serverSocket = new ServerSocket();
        } catch (IOException ex) {
            throw new IllegalStateException("Unable to create ServerSocket.", ex);
        }

        try {
            InetSocketAddress sa = new InetSocketAddress(port);
            serverSocket.bind(sa);
            return true;
        } catch (IOException ex) {
            return false;
        } finally {
            try {
                serverSocket.close();
            } catch (IOException ex) {
                // ignore
            }
        }
    }
}

Related

1. isPortActive(String host, int port)
2. isPortAvailable(final int port)
3. isPortAvailable(int p)
4. isPortAvailable(int port)
5. isPortAvailable(int port)
6. isPortAvailable(int port)
7. isPortAvailable(int port)
8. isPortAvailable(int port)
9. isPortAvailable(int port)