Teach Yourself Java in 21 Days
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abcd P2/V4SQC6 TY Java in 21 Days 030-4 louisa 12.31.95 FM LP#4 Day 10 Simple Animation and Threads 173 Creating Animation in Java .................................................................... 174 Painting and Repainting .................................................................... 174 Starting and Stopping an Applet’s Execution ...................................................................... 175 Putting It Together ............................................................................ 175 Threads: What They Are and Why You Need Them ................................................................... 177 The Problem with the Digital Clock Applet ...................................... 178 Writing Applets with Threads ............................................................ 179 Fixing The Digital Clock ................................................................... 180 Reducing Animation Flicker ................................................................... 182 Flicker and How to Avoid It .............................................................. 182 How to Override Update ................................................................... 183 Solution One: Don’t Clear the Screen ............................................... 183 Solution Two: Redraw Only What You Have To ................................................................ 186 Summary ................................................................................................ 192 Q&A ...................................................................................................... 192 Day 11 More Animation, Images, and Sound 195 Retrieving and Using Images .................................................................. 196 Getting Images .................................................................................. 196 Drawing Images ................................................................................. 198 Modifying Images .............................................................................. 201 Creating Animation Using Images .......................................................... 201 An Example: Neko............................................................................. 201 Retrieving and Using Sounds .................................................................. 209 Sun’s Animator Applet ........................................................................... 211 More About Flicker: Double-Buffering................................................... 212 Creating Applets with Double-Buffering............................................ 212 An Example: Checkers Revisited ........................................................ 213 Summary ................................................................................................ 214 Q&A ...................................................................................................... 215 Download 5.76 Mb. Do'stlaringiz bilan baham: 
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