基于MIDP实现Dialog组件[4]

    public static final Command exitCommand = new Command("Exit", Command.EXIT,
            1);

    public DialogTest()
    {
    }

    public void commandAction(Command c, Displayable d)
    {
        if (c == exitCommand)
        {
            exitMIDlet();
        }
    }

    protected void destroyApp(boolean unconditional)
            throws MIDletStateChangeException
    {
        exitMIDlet();
    }

    public void exitMIDlet()
    {
        notifyDestroyed();
    }

    public Display getDisplay()
    {
        return display;
    }

    protected void initMIDlet()
    {
    }

    protected void pauseApp()
    {
    }

    protected void startApp() throws MIDletStateChangeException
    {
        if (display == null)
        {
            display = Display.getDisplay(this);
            initMIDlet();
        }

        confirm = new ConfirmationDialog(display, "继续操作嘛？");
        confirm.setDialogListener(this);
        confirm.display();
    }

    public void dialogDismissed(Dialog d, int code)
    {
        if (d == confirm)
        {

            if (code == ConfirmationDialog.YES)
            {
                message = new MessageDialog(display, "您选择了确定");
            } else
            {
                message = new MessageDialog(display, "您选择了返回");
            }
            message.display();
            message.setDialogListener(this);
        } else if (d == message)
        {

            Form f = new Form(null);
            f.append("退出程序");
            f.addCommand(exitCommand);
            f.setCommandListener(this);
            display.setCurrent(f);
        }
    }

}

上面的整个代码是一个完整的Dialog组件（不包括DialogTest)如果需要使用直接放在你的project里面就可以了！