Rotating Images With Angles On KeyPresses

Hi, I was wondering how I could rotate an image when I press a key. For example, if I pressed D it would rotate right and A left. I know how to set up keyListeners but not sure about the rotation.

I then wondered about how I would go about getting something to face a direction. So if I pressed G, the image would turn to face a certain angle?

Thanks in advance!

~Ben