Rotating a png image representing a unit in a game

I am using png's in my tower defense game. How would I rotate a picture so it follows the movement of another picture (lik开发者_如何学Ce a turret always pointing at a target)?

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Look into the AffineTransform class. The rotate method is what you're looking for. Here's an example!

If you've got some other specific game-development-related questions, there's a Game Development StackExchange site too.