实例90Screen小程序实例91文字跑马灯与信息窗口实例92手机日历实例93手机画册实例94Canvas绘图程序importjavax.microedition.lcdui.*;importjavax.microedition.midlet.*;importjava.io.IOException;//Canvas绘图程序publicclassCanvasDemoextendsMIDletimplementsCommandListener{privateCommandexitCommand=newCommand("退出",Command.EXIT,1);//退出