interface help

[alpdog14]

So I have following code fragement:

LibraryFactory f = new DefaultLibraryFactory();
Library l = f.createArchive(
   			f.createSong(),
   	f.createSong(),
   	f.createGroup(3, f.createSong())
      );

I need to develop a LibraryFactory interface to make this work, I tried to develop this:

interface LibraryFactory { 

	
Object createSong();

	Object createGroup(int i, Object createSong);

	Library createArchive(Object createSong, Object createSong2,
	Object createGroup);

}

Somethings seems off to me, can any guide me in the right direction?

[ozzyman]

No, it looks quite alright to me.. I just think interfaces maybe simpler than you think

[sunde887]

As ozzy said, your interface looks fine. Interfaces are actually fairly simple. All they do is list a bunch of abstract method and any class that implements them is responsible for providing a definition for each method.

Would you mind saying what you think seems off?

[Tolls]

Well, for starters, I would suggest all those Object objects you are using are wrong. Shouldn't a song be a Song class, and a group a Group class?