Why is my ArrayList.remove(id) call not working?

I have an ArrayList, which includes a number of items I want to remove. I have the ids of the items to remove stored in another list. Figured the following code should work trivially, but for some reason, the remove() calls are returning a false value:

  ArrayList<Integer> toRemove = new ArrayList<Integer>();
  ArrayList<JCheckBox> al = new ArrayList<JCheckBox>();

  /* Code that adds a bunch of items to al, and a few integers to toRemove */

  System.out.println("Size before removing: " + al.size());
  for (int i = toRemove.size() - 1; i >= 0; i--) {
    System.out.println("Removing id: " + toRemove.get(i) + ": ");
    System.out.println(al.get(toRemove.get(i)));
    System.out.println(al.remove(toRemove.get(i)));
  }
  System.out.println("Size after removing: " + al.size());

I'd get it if the get() call also returned a false value, but it does actually return the object in question. What am I missing here?

The output of the code above:

Size before removing: 3
Removing id: 2: 
javax.swing.JCheckBox[...]
false
Size after removing: 3