Server

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package server;
import java.io.*;
import java.net.*;
import java.util.Scanner;
/**
 *
 * @author user
 */
public class SOK_1_SERVER {
    public static void main(String[] args) throws Exception
        {
            SOK_1_SERVER SERVER = new SOK_1_SERVER();
            SERVER.run();
        }
     public void run() throws Exception
        {
            String output;
            System.out.println("server");
            Scanner scanner = new Scanner(System.in);
            ServerSocket SRVSOCK = new ServerSocket(5454);
            Socket SOCK = SRVSOCK.accept();
             while(true){
            InputStreamReader IR = new InputStreamReader(SOCK.getInputStream());
            BufferedReader BR = new BufferedReader(IR);

            String MESSAGE = BR.readLine();
            System.out.println("Client:" + MESSAGE);

           if (MESSAGE !=null)
            {
                PrintStream PS = new PrintStream(SOCK.getOutputStream());
                System.out.print("Server:");
                output=scanner.nextLine();
                PS.println("Server:" + output);
            }
        }
        }
}