我的J2ME编程联系（3）——Gauge

/* * gaugelet.java * * Created on 2005年4月15日, 下午5:19 */

import javax.microedition.midlet.*;import javax.microedition.lcdui.*;

/** * * @author  Administrator * @version */public class gaugelet extends MIDlet implements CommandListener{        private Gauge aGauge;    private Form aForm;    private Command exitCommand;    private Command okCommand;    private Display aDisplay;    private Alert anAlert;        public gaugelet(){                aForm=new Form("GaugeTest");        exitCommand=new Command("EXIT",Command.EXIT,1);        okCommand=new Command("OK",Command.OK,1);        aGauge=new Gauge("gaugedisplay",true,100,50);        anAlert=new Alert("Value",null,null,AlertType.INFO);                aForm.addCommand(exitCommand);        aForm.addCommand(okCommand);        aForm.append(aGauge);        aForm.setCommandListener(this);            }    public void startApp() {                aDisplay=Display.getDisplay(this);        aDisplay.setCurrent(aForm);    }        public void pauseApp() {    }        public void destroyApp(boolean unconditional) {    }        public void commandAction(Command c,Displayable d){                String s="The Value is ";        int i;                if(c==exitCommand){                        destroyApp(false);            notifyDestroyed();        }                else{                        i=aGauge.getValue();            s+=Integer.toString(i);            anAlert.setString(s);            aDisplay.setCurrent(anAlert,aForm);                                }    }}