webswing

I have a big swing application that I have developed. There are several classes that each creates its own JFrame while closing the previous one which called this class. I wish to deploy this into a web browser and understand that I need to convert it to an applet. Do I have to add in code for creating applet in each of these classes? or is there some other way. In my current situation each of the class creates a JFrame which has some buttons which on being clicked will close the current JFrame and instantiate a new class which creates another JFrame . Could you please help me and advice me on