Java Server PC

/*
This is an example of a Java Server for PC.
When the server receives a message that equals "off" it shuts down the PC.
 */
package server;

import java.awt.Robot;
import java.awt.Window;
import java.awt.event.KeyEvent;
import java.net.*;
import java.io.*;

public class MyServer
{
    private static ServerSocket ss;
    private static Socket s;
    private static BufferedReader br;
    private static InputStreamReader isr;
    private static String message = "";

    public static void main(String[] args)
    {
        try
        {
            Robot r = new Robot();
            while(true)
            {
                ss = new ServerSocket(3000);
                s = ss.accept();
                isr = new InputStreamReader(s.getInputStream());
                br = new BufferedReader(isr);
                message = br.readLine();
                System.out.println(message);

                if(message.equalsIgnoreCase("off"))
                {
                    Runtime runtime = Runtime.getRuntime();
                    Process proc = runtime.exec("shutdown -s -t 0");
                }

                isr.close();
                br.close();
                ss.close();
                s.close();
            }
        }
        catch(Exception e)
        {

        }
        System.out.println("Server Started");
    }
}