First add the import statement to the top of the method class; (Thanks Herman, my bad) Then usewithin the code to remove all objects in the world.

BTW, if there is a chance that there are no objects to remove, change line 2 to or

Then you also can remove all the objects in the actor class with: List remove = getObjects( Actor.class ); for (Object objects : remove) removeObject( ( Actor ) objects );

You got all the right bits here somewhere, but just to clarify: The correct code is (assuming you are in the World class): or alternatively, just: In the second case, you don't need the import. The check if (objects != null) ... is wrong. getObjects will never return null. If there are no objects, it will return an empty list (which is not the same as null). The check if (objects.size > 0) ... which could also be written as if (objects.isEmpty()) ... is not needed, as the removeObjects method works perfectly well with an empty list, so it's not a mistake to pass an empty list to it. The last version mentioned by Herman works, but is unnecessarily long. removeObjects(List) does exactly the same as calling removeObject(Actor) in a loop.

@mik, thanks michael -- I knew one of the two would work, so I gave both with the 'or'. Though, it makes sense that it would be the one it is. It still would create a List object, even if it is empty. It also makes sense that 'removeObjects(List)' would work on an empty list. Thanks, again.