Strategy 2

1. Controller is an interface with a void doIt() method. Write the interface.

2. Write DoubleDot class implementing the Controller interface that tells two robots to put a beeper and move. DoubleDot itself is not a robot. The DoubleDot class has to find out which UrRobots in its constructor.

    public static void demo() {
        UrRobot x = new UrRobot(3,1,Directions.East,5);
        UrRobot y = new UrRobot(5,1,Directions.South,2);
        DoubleDot c = new DoubleDot(x,y);
        c.doIt();
        // x puts a beeper and moves to (3,2)
        // y puts a beeper and moves to (4,1)
    }
   

3. The BC class is a kind of UrRobot that uses a Controller. These robots always start at street=7, avenue=3, with 10 beepers. The constructor should take in the direction and a Controller.

   When you tell a BC robot to move, it moves and applies the doIt() method of the controller.