I'm getting a nullpointer exception at line 33.

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I'm getting a nullpointer exception at line 33.

Computer Science
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At vero eos et accusamus et iusto odio dignissimos ducimus qui blanditiis praesentium voluptatum deleniti atque corrupti quos dolores et quas molestias excepturi sint occaecati cupiditate non provident, similique sunt in culpa qui officia deserunt mollitia animi, id est laborum et dolorum fuga. Et harum quidem rerum facilis est et expedita distinctio. Nam libero tempore, cum soluta nobis est eligendi optio cumque nihil impedit quo minus id quod maxime placeat facere possimus, omnis voluptas assumenda est, omnis dolor repellendus. Itaque earum rerum hic tenetur a sapiente delectus, ut aut reiciendis voluptatibus maiores alias consequatur aut perferendis doloribus asperiores repellat.

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getContentPane().setLayout(null); This looks wrong. A setLayout() function ususally wants a type of layout as an argument, and I wouldn't be surprised if passing it null is causing the exception.
You initialize speed: ``` JSlider speed; //Speed of ball ``` So at this point it is null. Later on you call: ``` speed.setBounds(1, 1, 50, 50); ``` You are calling a method for a null value, which isn't possible. You need speed to be initialized. For example you would need something along the lines of `speed = new JSlider()` to ensure that it's a non-null object. Then you can call methods on it.

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