/**
* java awt雙緩衝技術 複製代碼到顯示區
*/
Image offScreenImage = null;
public void update(Graphics g) {
if(offScreenImage == null) {
offScreenImage = this.createImage(屏幕寬, 高);
}
Graphics gOffScreen = offScreenImage.getGraphics();
Color c = gOffScreen.getColor();
gOffScreen.setColor(Color.GREEN);
gOffScreen.fillRect(0, 0,屏幕寬, 高);
gOffScreen.setColor(c);
paint(gOffScreen);
g.drawImage(offScreenImage, 0, 0, null);
}