Posted By: Anonymous
I think it’s a fairly simple question, but I can’t figure out how to do this properly.
I’ve got an empty arraylist:
ArrayList<object> list = new ArrayList<object>();
I’ve got some objects I want to add and each object has to be at a certain position. It is necessary however that they can be added in each possible order. When I try this, it doesn’t work and I get an
list.add(1, object1) list.add(3, object3) list.add(2, object2)
What I have tried is filling the
null and then doing the above. It works, but I think it’s a horrible solution. Is there another way to do this?
You can do it like this:
list.add(1, object1) list.add(2, object3) list.add(2, object2)
After you add object2 to position 2, it will move object3 to position 3.
If you want object3 to be at position3 all the time I’d suggest you use a HashMap with position as key and object as a value.