Use of applet as interface

Question

can an applet be used as an interface(java interfaces).If yes how can it be done?

Answer 1

Not sure what your question referes to but I'll try anyway.
No, the applet-code is already created by sun as an concrete class and not an interface.
Depending on what you want, there is other simple solutions.
For instance, if you are trying to imitate the life-cycle scheme that applets uses, you could make your own interface enforcing methods with the same names as the applet class requires, stop(), init(), destroy() etc. This will not make classes that implement your interface into applets thou, but will have the ability to be treated with the same life-cycle. There is also nothing stopping to inherit from applet and extending your own interface.
If you are trying to use the applet as a normal application as well and you rely on methods that has to do with the AppletStub-interface, like getDocumentBase() etc etc. It is very easy to implement an dummy-appletstub class that points the documentbase to your choice of location on the harddrive, and then just instantiate that one in your own main before you call methods to init, etc.