My desgn model and Form concerns - Help please

[Juwonlo Ibigbami]

Hello all,
Please I will need a help on the kind of design I chose in order to implement a job.
I am developing a large application for mobile phones and i am using the LWUIT APIs.

From decoupling perspective, I have decided to break the implementation of every of my operations into a classes, implemented in a Form class (LWUIT Form); i.e. I use a form for specific operation, and from a form calls on another form, and frm there calls another, and so on.........
I always call another form from a form, base on the operation to perform, for example;

1. I always have my class declared like this.......

public class NewsHeadlines extends Form implements ActionListener{}

2. I always transfer controls or call another class/Form like this......

public void actionPerformed(ActionEvent ae) {
        
        Command cmd = ae.getCommand();
        switch (cmd.getId()) {
            case 0:
                new MyMediaList().show();
                break;

            case 1:

                //callThePoolingDetailForm(indexSel);
                new Readnews(indexSel,mediaName,tabId,sentImage).show();
                break;

            default:
                new MainMenu().show();
        }
    }

My concerns here is this, since there is no way to close/end a Form,
Will these Forms that are loaded after the other remain in the memory?
Will each of the call/invocation of Forms (or their constructors), be called in a stack (just like the normal method invocation)?

I am writing an application, and half way into the development i already have 30 classes, i hope if a user has to perform operation for a long time, the application will not crash?
What could possible be the best practice in this case?

Thanks - Juwonlo

[Madhan Sundararajan Devaki]

You may do the following to ensure that, at any point in time you have only one form loaded.

* Collect data from the current form
* Store the contents into a bean
* Close the current form
* Show the new form (use the contents in the bean to fill the form automatically, if required)
* Remove the bean

[Juwonlo Ibigbami]

Hello Madhan,
Thanks for the response......
you said

Close the current form

How do i close a LWUIT form?

Thanks - Juwonlo

[Madhan Sundararajan Devaki]

You may do the following.

    formObject.removeAll();
    formObject.setEnabled( false );
    formObject.setFocusable( false );
    formObject.setVisible( false );
    formObject = null;