Java ArrayIndexOutOfBoundsException: 15 - How to Fix

This error message indicates that there is an attempt to add an element to an ArrayList at an index that is out of bounds. In this case, the index is 15, which means that the ArrayList most likely does not have 15 elements and therefore cannot add an element at that index.

To fix this error, you need to make sure that you are adding elements to the ArrayList at a valid index. Check the size of the ArrayList before adding an element to ensure that the index is within bounds.