You are given a class called Record, which defines an audio (pre-CD...

You are given a class called Record, which defines an audio (pre-CD or MP3) Record. If you need to, you can add methods to this class.

You are to write a class called Jukebox, which holds a number of Records. Jukebox can use either an ArrayList or a Vector to store its data (Records). This will be referred to as AL or V from here on.

Your Jukebox class should implement JukeInterface, which is also in this Minilab’s folder. It will tell what methods must be implemented (and the comments describe how the methods should work).

You can write Jukebox in either one of two ways:

1) Jukebox can be a subclass of AL or V (using “implements”). This makes all of the AL or V methods automatically inherited by Jukebox. So in the Jukebox code, you can access the .indexOf method (for example) by calling indexOf or this.indexOf. This is because it is the Jukebox’s own method.   

The disadvantage of this is that outside programs (like the tester) can call Jukebox’s methods and also call the AL or V methods.

2) Jukebox can be a class that has an AL or V as part of its data. In the Polymorphism Minilab, this is how Course was implemented – it had an Array as part of its data.   If you do it this way, you should

- declare the AL or V as data and then
- create it (with a “new” statement) in the constructor.   

The advantage is that outside programs (like the tester) can now only “see” the Jukebox’s methods.

In addition, you have 2 other requirements:
1) You should use Generics to define your AL or V. In your program, it will only hold Records.
2) You should not traverse the AL or V to try to “do things yourself.” You can look up built-in AL or V methods which will do everything you need. NOTE: In order for some built-in AL or V methods to work correctly, you will have to add a specific method to Record (as described in class).