package drawregiondemo;import javax.microedition.lcdui.*;import javax.microedition.midlet.*;public class DrawRegionDemo extends MIDlet implements CommandListener{        private Display display;        private ImageCanvas myCanvas;        private Command   exitCmd = new Command(" 退出", Command.SCREEN, 1);        public DrawRegionDemo()        {        	myCanvas = new ImageCanvas();                display = Display.getDisplay(this);                myCanvas.addCommand(exitCmd);                                                myCanvas.setCommandListener(this);        }        public void startApp()        {                                 display.setCurrent(myCanvas);        }        public void pauseApp()        {        }        public void destroyApp(boolean unconditional)        {        }        public void commandAction(Command cmd, Displayable disp) {        if(cmd == exitCmd){        destroyApp(false);        notifyDestroyed();        }                        }}