import java.applet.*;
import java.awt.*;
import java.io.*;
import java.net.*;
import java.lang.*;

public class OBJClient extends Applet implements Runnable {
      public static final int PORT = 6789;
      public String[] objArray;
      Socket s;
      DataInputStream in;
      PrintStream out;
      TextArea outputarea;
      StreamListener listener;
      Thread myThread;
      String score;

      // Create a socket to communicate with a server on port 6789 of the
      // host that the applet's code is on.  Create streams to use with
      // the socket.  Then create a TextField for user input and a TextArea
      // for server output.  Finally, create a thread to wait for and
      // display server output.
      public void init() {
                 outputarea = new TextArea();
                 outputarea.setEditable(false);
                 this.setLayout(new BorderLayout());
                 this.add("Center", outputarea);
      }

      public void run() {
            if (score.equals(null)) return;
            try {
                  s = new Socket(this.getCodeBase().getHost(), PORT);
                  in = new DataInputStream(s.getInputStream());
                  out = new PrintStream(s.getOutputStream());

                  out.println(score);
            }
            catch (IOException e) {this.showStatus("Exception: " + e);}

            listener = new StreamListener(in, outputarea);
            this.showStatus("Connected to "
                       + s.getInetAddress().getHostName()
                       + ":" + s.getPort());
      }

      public void start() {
              if (myThread == null) {
                       myThread = new Thread(this);
                       myThread.start();
              }
      }

      public void setScore(String aString) {
              score = aString;
              myThread = null;
      }
}


// Wait for output from the server on the specified stream, and display
// it in the specified TextArea.
class StreamListener extends Thread {
      DataInputStream in;
      TextArea output;
      public StreamListener(DataInputStream in, TextArea output) {
            this.in = in;
            this.output = output;
            this.start();
      }
      public void run() {

            try {
                  String line;

      while ((line = in.readLine()) != null)
           if (line.startsWith("OBJ> ")) 
             output.appendText(line.substring(5, line.length()) + "\n");
           else
             output.appendText(line + "\n");
            }
            catch (IOException e) {output.setText(e.toString());}
            finally {output.appendText("Connection closed by server.\n\n");}
      }
}