I want to be able to decrease a value in an ArrayList to simulate an object being removed from a pile. However I cannot do this with ArrayList(String)
The example below is what i've attempted.
ItemArray.get(pressedItem + 1) = (ItemArray.get(pressedItem + 1)) - 1
Is there a way to get values in an ArrayList into a more manipulatable state?
EDIT:
Just to point out that my ArrayList is ArrayList(String) at the moment
You need to use List#set() to mutate the list.
List<Integer> items = new ArrayList<Integer>();
// later...
int position = pressedItem + 1;
items.set(position, items.get(position) - 1);
ItemArray.get(position) - 1 returns an error The operator - is undefined for the argument type(s) String, int
ArrayList is a class. Assuming ItemArray is an instance of that class (please start variables with a lower-case letter, btw), you'll need to use it through method calls. In your case, set. Like so:
itemArray.set(pressedItem + 1, itemArray.get(pressedItem + 1) - 1)
Mind that the above will only work exactly like that if you declared your ArrayList as containing Integers or some other numeric type, so Java can do the conversion stuff for you:
List<Integer> itemArray = new ArrayList<Integer>();
