" redraw it when an event is triggered"
Wrong question...
Indeed, we see some sketches just using drawing operations in the event handler. But that's for the simplest sketches. For more complex projects, it is better to maintain some state in the object (the coordinates, of course, but also perhaps angle, color, details, etc.) and to redraw the whole scene from draw().
The usual way is to loop in draw() over the list of objects, and for each of them, ask them to update themselves, then to draw themselves at the right place, in the right state.

I was going to have the event handle modify a variable based on input and then i would be able to pass that variable to the object at a set interval so the object knew what to do but i still dont know how to draw the object. Since im using it in eclipse when i create a new class and try to draw from the new class it throws a null pointer exception.

" it throws a null pointer exception"
Debugging by guesses it quite hard...
You should show a minimalistic version of your code (only one class, no fluff) so we get an idea on how you do things.