java.lang.IndexOutOfBoundsException: Invalid index 2, size is 2

This exception is thrown when you try to access an element at an index that is outside the range of valid indices for a collection or an array. In this case, the index 2 is invalid because the size of the collection or array is only 2.

For example, if you have an array with 2 elements:

int[] arr = {1, 2};

And you try to access the element at index 2:

int x = arr[2];

You will get this exception because the valid indices for this array are 0 and 1, not 2.

To fix this error, make sure you are using valid indices when accessing elements in a collection or array.