You can better try with:
Thrown to indicate that the code has attempted to cast an object to a
subclass of which it is not an instance.
Although in your code it is not making sense how you receive the ClassCastException even after if we change as I suggested.
As in your code you have taken
short and initialized it with value
1. Now later why you want to cast the value
short as it is already
Example of ClassCastException could be like this:-
Object i = Integer.valueOf(1); String s = (String)i;