import javax.microedition.lcdui.*;
import javax.microedition.midlet.*;
public class Pacer extends MIDlet{
public void startApp() {
Displayable d = new PacerCanvas();
d.addCommand(new Command("Exit", Command.EXIT, 0));
d.setCommandListener(new CommandListener() {
public void commandAction(Command c, Displayable s) {
notifyDestroyed();
}
} );
Display.getDisplay(this).setCurrent(d);
}
public void pauseApp() { }
public void destroyApp(boolean unconditional) { }
}
class PacerCanvas extends Canvas {
public void paint(Graphics g) {
int w = getWidth();
int h = getHeight();
g.setColor(0xffffff);
g.fillRect(0, 0, w, h);
g.setColor(0x000000);
for (int x = 0; x < w; x += 10)
g.drawLine(0, w - x, x, 0);
int z = 50;
g.drawRect(z, z, 20, 20);
z += 20;
g.fillRoundRect(z, z, 20, 20, 5, 5);
z += 20;
g.drawArc(z, z, 20, 20, 0, 360);
}
}
（出处：http://www.knowsky.com）
