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

public class Hello extends javax.microedition.midlet.MIDlet implements CommandListener{
 protected Form form;
 protected Command quit;
  public Hello(){
 form=new Form("我的MIDlet");
 form.append("欢迎，MIDLET WORLD！");

 form.setCommandListener(this);
 quit=new Command("离开",Command.SCREEN,1);
 form.addCommand(quit);
         }
 protected void startApp() throws MIDletStateChangeException
 { Display.getDisplay(this).setCurrent(form);
 }
 protected void pauseApp(){
     }
 protected void destroyApp(boolean unconditional) throws MIDletStateChangeException
 {
 }
  public void commandAction(Command command,Displayable displayable)
 {
  try{
   if(command==quit){
    destroyApp(true);
    notifyDestroyed();
      }
     }
  catch(MIDletStateChangeException me){}
 }

                }

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