Properly removing an Integer from a List

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Java always calls the method that best suits your argument. Auto boxing and implicit upcasting is only performed if there’s no method which can be called without casting / auto boxing.

The List interface specifies two remove methods (please note the naming of the arguments):

  • remove(Object o)
  • remove(int index)

That means that list.remove(1) removes the object at position 1 and remove(new Integer(1)) removes the first occurrence of the specified element from this list.

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