Java HTTP Port Find availablePort(int prefered)

Description

Check whether the port is available to binding

License

Apache License

Parameter

Parameter	Description
prefered	a parameter

Return

-1 means not available, others means available

Declaration

public static int availablePort(int prefered) 

Method Source Code

//package com.java2s;
//License from project: Apache License 

import java.io.IOException;

import java.net.ServerSocket;

public class Main {
    /**/*from   ww  w . ja  va 2  s  . c  o  m*/
     * Check whether the port is available to binding
     * 
     * @param prefered
     * @return -1 means not available, others means available
     */
    public static int availablePort(int prefered) {
        int rtn = -1;
        try {
            rtn = tryPort(prefered);
        } catch (IOException e) {

        }
        return rtn;
    }

    /**
     * Check whether the port is available to binding
     * 
     * @param port
     * @return -1 means not available, others means available
     * @throws IOException
     */
    public static int tryPort(int port) throws IOException {
        ServerSocket socket = new ServerSocket(port);
        int rtn = socket.getLocalPort();
        socket.close();
        return rtn;
    }
}

Related

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