Question

I wrote a simple server client socket program and when I recompile the server I get:

java.net.BindException: Address already in use: JVM_Bind
    at java.net.DualStackPlainSocketImpl.bind0(Native Method)
    at java.net.DualStackPlainSocketImpl.socketBind(Unknown Source)
    at java.net.AbstractPlainSocketImpl.bind(Unknown Source)
    at java.net.PlainSocketImpl.bind(Unknown Source)
    at java.net.ServerSocket.bind(Unknown Source)
    at java.net.ServerSocket.<init>(Unknown Source)
    at java.net.ServerSocket.<init>(Unknown Source)

Therefore my question is how to kill the socket under windows 7? Is there a possible solution to kill it in eclipse?

I appreciate your answer!!

Answer 1

Here is my code for server side:

import java.io.*;
import java.net.*;

public class ServerSide {


    public static void main(String[] args) {

        try
        {
            ServerSocket myServerSocket = new ServerSocket(9999);
            System.out.println("Server is waiting on host" + InetAddress.getLocalHost().getCanonicalHostName() + "port= "+ myServerSocket.getLocalPort());
            Socket skt = myServerSocket.accept();

            BufferedReader myInput = new BufferedReader(new InputStreamReader(skt.getInputStream()));
            PrintStream myOutput = new PrintStream(skt.getOutputStream());

            String buf = myInput.readLine();
            System.out.println("Server readLine");
            if(buf!=null)
            {
                System.out.println("Buf = " + buf);
                myOutput.print("Got it?");
            }
            else
            {
                System.out.println("Nothing returned in server sidex`x  ");
            }
            skt.close();
            System.out.println("Server shutdown");
        }
        catch(IOException e)
        {
            e.printStackTrace();
            System.out.println("Whooops");
        }
    }

}

As you can see for clean-up I’ve written:

        skt.close();

But maybe this is not your problem, Maybe your problem is which I had 1 hour ago 😉 I used to run a program but the result is not what I expected so I modify it and run it again but the port was busy or already in use! What I do on eclipse? Under the Console where you get the error, on the right side of the window there is red colour rectangle button! It say “Terminate”. If you click on that your port will be free. By the way don’t forget to check the console for both(Server/Client) sides.