Sample Code: GraphThreads.java

package examples;
import becker.robots.*;

public class GraphMultiple extends Object
{  	 
   public static void main(String[] args)
   {
      GraphCity gc = new GraphCity(7, 1, 1, 10);
      gc.showThingCounts(true);
      ThreadedGraphBot karel = new ThreadedGraphBot(gc, 1, 1, Directions.EAST);
      ThreadedGraphBot hal = new ThreadedGraphBot(gc, 1, 3, Directions.EAST);
      ThreadedGraphBot sue = new ThreadedGraphBot(gc, 1, 5, Directions.EAST);
      CityFrame f = new CityFrame(gc, 12, 9);

      Thread sueThread = new Thread(sue);
      sueThread.start();

      Thread halThread = new Thread(hal);
      halThread.start();

      Thread karelThread = new Thread(karel);
      karelThread.start();
   }
}

Note: the source code for an applet is slightly different than for an application.