IndexOutOfBoundsException when adding to ArrayList at index

Question

I get exception Exception in thread \"main\" java.lang.IndexOutOfBoundsException: Index: 1, Size: 0 for the below code. But couldn\'t understand why.

Answer 1

Your ArrayList is empty. With this line:

s.add(1,"Elephant");

You are trying to add "Elephant" at index 1 of the ArrayList (second position), which doesn't exist, so it throws a IndexOutOfBoundsException.

Use

s.add("Elephant");

instead.