一个关闭程序的例子

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

public class Mobile extends MIDlet implements CommandListener
...{
    private Display display;
    private Form mainForm;
    private StringItem stringItem;
    private Command exitCommand = new Command("Exit", Command.EXIT, 1);

    public static final String WEB_SITE = "WEB_SITE";

    protected void startApp() throws MIDletStateChangeException
    ...{

        initMIDlet();
        display.setCurrent(mainForm);

    }

    private void initMIDlet()
    ...{
        display = Display.getDisplay(this);
        mainForm = new Form("Hello World");
        stringItem = new StringItem(null, null);
        String text = getAppProperty(WEB_SITE);
        stringItem.setText(text);
        mainForm.append(stringItem);
        mainForm.addCommand(exitCommand);
        mainForm.setCommandListener(this);
    }

    protected void pauseApp()
    ...{

    }

    protected void destroyApp(boolean arg0) throws MIDletStateChangeException
    ...{
        System.out.println("exit the application");
    }

    public void commandAction(Command cmd, Displayable display)
    ...{
        if (cmd == exitCommand)
        ...{
            try
            ...{
                destroyApp(false);
                notifyDestroyed();
            } catch (MIDletStateChangeException e)
            ...{
                e.printStackTrace();
            }
        }
    }

}