Question

I have made a LinkedList to store State objects which is a class I have created. I can add states to the list as expected, but whenever I try the size() method on the list it always returns twice the amount of elements I have added. Why is it doing this and how can I then use the get(n) method if each element has 2 values of n?

Here’s the code used to create and add to the list:

static ArrayList<State> stateTable = new ArrayList<State>();
stateTable.add(new State(new Item(0,0)));

I will add that the adding to the list is done inside the constructor for State objects so that all created States get put in the stateTable.
Thanks

Answer 1

I will add that the adding to the list is done inside the constructor
for State objects so that all created States get put in the
stateTable.

If you already add the states to your list inside the constructor and additionally have the line

stateTable.add(
    new State(new Item(0,0))     // <= first time inside new State(...)
);                               // <= second time explicitely in this line

then you are indeed adding it twice.