Removing an Integer from a List Integer in Java

Question

Suppose following is my list from where I just want to remove the first element.  But here I am confused between remove(int index) and remove(Object o) methods, which one to use?

List<Integer> myList = new ArrayList<Integer>();
myList.add(5);
myList.add(6);
myList.add(7);
myList.add(1);

Answer 1

In Java, the method best suiting your argument will always be called. Thus, autoboxing and implicit upcasting are only performed if there's no method which can be called without them.

The List interface specifies two remove methods:

• remove(Object o): removes the object at position 1
• remove(int index): removes the first occurrence of the specified element from this list