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an example of double-buffering using java.awt.image.BufferStrategy
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| import java.applet.Applet; | |
| import java.awt.Canvas; | |
| import java.awt.Color; | |
| import java.awt.Graphics2D; | |
| import java.awt.image.BufferStrategy; | |
| public class TestAppletCanvasBufferStrategy extends Applet { | |
| public void init() { | |
| this.canvas.setSize(WIDTH, HEIGHT); | |
| this.add(this.canvas); | |
| this.canvas.createBufferStrategy(2); | |
| } | |
| public void start() { | |
| isRunning = true; | |
| final Runnable r = new Runnable() { | |
| public void run() { | |
| long time = 0; | |
| int frames = 0; | |
| int x = 0; | |
| final Canvas c = canvas; | |
| while (isRunning) { | |
| final BufferStrategy strategy = c.getBufferStrategy(); | |
| do { | |
| do { | |
| final Graphics2D g = (Graphics2D)strategy.getDrawGraphics(); | |
| g.setColor(Color.BLUE); | |
| g.fillRect(0, 0, WIDTH, HEIGHT); | |
| g.setColor(Color.GREEN); | |
| g.fillRect(x, 50, 100, 100); | |
| g.dispose(); | |
| } while (strategy.contentsRestored()); | |
| strategy.show(); | |
| } while (strategy.contentsLost()); | |
| x++; | |
| if (x > WIDTH) { | |
| x = 0; | |
| } | |
| } | |
| } | |
| }; | |
| final Thread t = new Thread(r); | |
| t.start(); | |
| } | |
| public void stop() { | |
| isRunning = false; | |
| } | |
| private volatile boolean isRunning; | |
| private final Canvas canvas = new Canvas(); | |
| // we can add min/max supported width/height const-s later | |
| static final int WIDTH = 800; | |
| static final int HEIGHT = 600; | |
| } |
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| <html> | |
| <body bgcolor='434572'> | |
| <table align='center'> | |
| <tr></tr> | |
| <tr> | |
| <td></td> | |
| <td> | |
| <applet archive ="appletgame.jar" | |
| code="TestAppletCanvasBufferStrategy.class" | |
| width="800" height="600"> | |
| <!-- no difference --> | |
| <param name="java_arguments" | |
| value="-Dsun.java2d.opengl=true"> | |
| </param> | |
| <param name="test.param.one" value="666" /> | |
| </applet> | |
| </td> | |
| <td></td> | |
| </tr> | |
| <tr></tr> | |
| </table> | |
| </body> | |
| </html> |
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