void act() // Called repeatedly void die() void pauseOrResume() «interface> Animate 1300.0 270.0 «abstract» Ball 1120.0 290.0 Shape getShape() Color getColor() «interface» Drawable 890.0 270.0 void moveTo(Point2D point) double distanceFrom(Point2D point) «interface» Relocatable 780.0 450.0 BallWorlds 170.0 340.0 BallWorldsFrame 140.0 460.0 UML class diagram for BallWorlds Execution starts here in main 0.0 330.0 JFrame 0.0 460.0 WorldPanel 510.0 560.0 World 430.0 340.0 void addBall(Ball ballToAdd) void removeBall(Ball ballToRemove) isInsideWorldX(Point2D point) isInsideWorldY(Point2D point) Point2D middleOfWorld() «interface» BallEnvironment 1130.0 50.0 ButtonsPanel 590.0 230.0 BallButton 1010.0 190.0 DudThatMoves 1100.0 480.0 Dud 1120.0 380.0 JButton 1010.0 30.0 JPanel 670.0 560.0 Mover 1120.0 570.0 Bouncer 1120.0 660.0 Exploder 1190.0 760.0 Shrinker 1050.0 760.0 A Ball must add itself to its World, by using the BallEnvironment that the Ball is given when the Ball is constructed 1370.0 140.0 Students: You implement the various types of Balls,with their different behaviors. To do so, simply implement the interfaces that every Ball implements(per this UML class diagram). All Balls implement these same interfaces, but in different ways. 540.0 790.0 Key: solid line, triangle arrowhead: X extends Y (IS-A, inheritance) dotted line, triangle arrowhead: X implements Y (IS-A, interfaces) solid line, open arrowhead with "constructs" on it: X CONSTRUCTS Y (HAS-A, constructs) solid line, open arrowhead: X REFERENCES Y (HAS-A, references) 20.0 570.0 void run() «interface» Runnable 330.0 540.0 void mouseClicked(MouseEvent event) void mousePressed(MouseEvent event) void mouseReleased(MouseEvent event) void mouseEntered(MouseEvent event) void mouseExited(MouseEvent event) «interface» MouseListener 280.0 670.0 void mouseMoved(MouseEvent event) void mouseDragged(MouseEvent event) «interface» MouseMotionListener 600.0 680.0 <<abstract>> Bumper 730.0 370.0 Color 1410.0 600.0 JPanel 600.0 140.0 Future extension 590.0 410.0 void actionPerformed(ActionEvent event) «interface» ActionListener 720.0 30.0 «interface» BumperEnvironment 580.0 470.0 «interface» Shape 1410.0 510.0 Ellipse2D.Double 1380.0 410.0 «interface» Point2D 930.0 590.0 Point2D.Double 910.0 680.0 Ball nearestBall(Point2D point) void drawBalls( Graphics2D graphics, Ball selectedBall) «interface» CollectionOfBalls 130.0 120.0 Color 410.0 40.0 Rectangle 130.0 40.0 «interface» Shape 280.0 40.0 constructs constructs 1..* 0..* constructs 0..* constructs constructs constructs 6..* 1..* constructs 0..*