Hi.
My Problem is that i want to add an object to an empty list, but when i do so it throws nullpointnerexception, whats my mistake?:
1 2 | if (storeballs.isEmpty())storeballs.set( 0 ,(BilliardBall)billiardball.get(i)); else storeballs.add((BilliardBall)billiardball.get(i)); |