Creating a new ArrayList in Java

Question

Assuming that I have a class named Class,

And I would like to make a new ArrayList that it's values will be of type Class.

My question is that: How do I do that?

I can't understand from Java Api.

I tried this:

ArrayList<Class> myArray= new ArrayList ArrayList<Class>; 

Answer 1

You are looking for Java generics

List<MyClass> list = new ArrayList<MyClass>(); 

Here's a tutorial http://docs.oracle.com/javase/tutorial/java/generics/index.html

Answer 2

If you just want a list:

ArrayList<Class> myList = new ArrayList<Class>(); 

If you want an arraylist of a certain length (in this case size 10):

List<Class> myList = new ArrayList<Class>(10); 

If you want to program against the interfaces (better for abstractions reasons):

List<Class> myList = new ArrayList<Class>(); 

Programming against interfaces is considered better because it's more abstract. You can change your Arraylist with a different list implementation (like a LinkedList) and the rest of your application doesn't need any changes.