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Attributes MIDlet

import javax.microedition.lcdui.Canvas; import javax.microedition.lcdui.Command; import javax.microedition.lcdui.CommandListener; import javax.microedition.lcdui.Display; import javax.microedition.lcdui.Displayable; import javax.microedition.lcdui.Form; import javax.microedition.lcdui.Graphics; import javax.microedition.lcdui.StringItem; import javax.microedition.midlet.MIDlet; public class AttributesMIDlet extends MIDlet implements CommandListener {   private Display display;   protected boolean started;   private Command exitCommand;   protected void startApp() {     if (!started) {       display = Display.getDisplay(this);       Canvas canvas = new DummyCanvas();       Form form = new Form("Attributes");       exitCommand = new Command("Exit", Command.EXIT, 0);       form.addCommand(exitCommand);       boolean isColor = display.isColor();       form.append(new StringItem(isColor ? "Colors: " : "Grays: ", String.valueOf(display           .numColors())));       form.append(new StringItem("Width: ", String.valueOf(canvas.getWidth())));       form.append(new StringItem("Height: ", String.valueOf(canvas.getHeight())));       form.append(new StringItem("Pointer? ", String.valueOf(canvas.hasPointerEvents())));       form.append(new StringItem("Motion? ", String.valueOf(canvas.hasPointerMotionEvents())));       form.append(new StringItem("Repeat? ", String.valueOf(canvas.hasRepeatEvents())));       form.append(new StringItem("Buffered? ", String.valueOf(canvas.isDoubleBuffered())));       form.setCommandListener(this);       display.setCurrent(form);       started = true;     }   }   protected void pauseApp() {   }   protected void destroyApp(boolean unconditional) {   }   public void commandAction(Command c, Displayable d) {     if (c == exitCommand) {       notifyDestroyed();     }   } } class DummyCanvas extends Canvas {   protected void paint(Graphics g) {   } }