Java generics with List

Question

I want to clarify something. This is my code:

List<GameObject>[] dynamicCells;                      //1
List<GameObject>[] staticCells;                       //2

dynamicCells = new List[numCells];                    //3
staticCells = new List[numCells];                     //4

for (int i = 0; i < numCells; i++) {
    dynamicCells[i] = new ArrayList<GameObject>(10);  //5
    staticCells[i] = new ArrayList<GameObject>(10);   //6
}

On the first and second step I create an "empty" array of GameObject list reference. On the third and fourth step I allocate memory for an array of List which I return its address reference. On the 5, 6 step I create a new ArrayList reference of type GameObject which I assign on my List.

So in the end I am left with an array Of list references that each one hold an ArrayList of game objects. Is this right ? Is there any better way to explain this ?

That's correct. Each variable is an array of List objects. — SamTebbs33
– SamTebbs33, Commented Oct 19, 2014 at 14:09

Maarten Winkels · Accepted Answer · 2014-10-19 14:16:14Z

2

1 and 2 are variable declarations, nothing is created there.

3 and 4 create arrays and assign them to the variables (in the process allocating memory, but only for the arrays of object references).

5 and 6 create new empty generic ArrayLists that are assigned to a position in the array.

edited Oct 19, 2014 at 14:16

answered Oct 19, 2014 at 14:12

Maarten Winkels

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1 Comment

KostasRim Over a year ago

Thanks for your answer, as i said i was pretty confused but now i am sure :)

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