Multithreaded Graphics - Custom Training Courses - Coreservlets.com

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Array-Based Animation• Idea– Load a sequence of images into an array– Start a thread to cycle through the images and draw to thegraphics object• Each time the thread loops through the while loop, thearray index is incremented and repaint (which triggersupdate) is called to update the images on the screen– Stop the animation by setting a flag• In an applet, end the animation from the applet’s stopmethod29Array-Based Animation:Examplepublic class ImageAnimation extends Applet {private static final int NUMDUKES = 2;private Duke[] dukes; // Duke has array of imagesprivate int i;public void init() {dukes = new Duke[NUMDUKES];setBackground(Color.white);}public void start() {int tumbleDirection;for (int i=0; i
Animation Example (Continued)public void update(<strong>Graphics</strong> g) {paint(g);}public void paint(<strong>Graphics</strong> g) {for (i=0 ; i
Page 3 and 4: Redraw Everything in paint• Idea-
Page 7 and 8: Drawing Directly on Window:Example
Page 9: Bounce Applet (Continued)19public v
Page 13: Double Buffering: Examplepublic voi
Page 17 and 18: Timers• Swing defines a Timer cla
Page 19 and 20: Timer Example (Continued)import jav
Page 21: © 2010 Marty HallQuestions?43Custo

Multithreaded Graphics - Custom Training Courses - Coreservlets.com

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