void act() // Called repeatedly void die() void pauseOrResume() «interface> Animate 1299.0 288.0 «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 184.0 339.0 BallWorldsFrame 221.0 465.0 255 182 193 255 UML class diagram for BallWorlds Execution starts here in main 21.0 309.0 JFrame 66.0 471.0 WorldPanel 500.0 548.0 World 381.0 344.0 void addBall(Ball ballToAdd) void removeBall(Ball ballToRemove) isInsideWorldX(Point2D point) isInsideWorldY(Point2D point) Point2D middleOfWorld() «interface» BallEnvironment 1133.0 51.0 ButtonsPanel 594.0 146.0 BallButton 978.0 150.0 DudThatMoves 1121.0 471.0 Dud 1117.0 383.0 JButton 1006.0 43.0 JPanel 649.0 549.0 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 1251.0 211.0 176 196 222 255 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. Ball and its subclasses should be in the ballworlds.ball package. 1306.0 579.0 255 182 193 255 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) 17.0 569.0 void run() «interface» Runnable 347.0 541.0 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 751.0 350.0 Color 1237.0 499.0 JPanel 592.0 41.0 Future extension 611.0 404.0 void actionPerformed(ActionEvent event) «interface» ActionListener 711.0 42.0 «interface» BumperEnvironment 580.0 470.0 «interface» Shape 1310.0 408.0 Ellipse2D.Double 1376.0 502.0 «interface» Point2D 915.0 590.0 Point2D.Double 918.0 678.0 Ball nearestBall(Point2D point) void drawBalls( Graphics2D graphics, Ball selectedBall) «interface» CollectionOfBalls 94.0 158.0 Color 352.0 42.0 Rectangle 81.0 41.0 «interface» Shape 232.0 39.0 constructs 1 constructs 1..* 1 * constructs 0..* * constructs 1 constructs 1 constructs 6..* 1 * constructs 0..* velocity 1 *