Well Recently I made this game in java and I wanted to make it if a bullet intersect with a asteroid, it adds to a double named damage. Once damage is equal to ten, the asteroid will go away. Here's how I tried to do it:

Well the asteroid disappearing works, But then I noticed it took only 1 shot instead of ten to get rid of it. So then I added the line at the end to check if there was something wrong. And Apparently instead of only adding 1 to damage once, it keeps adding 1 in a loop until it hits ten. The asteroids I added were just a test enemy, and I can't really make more challenging enemy's if all of the take one hit to kill. Any help will be great, I don't want a fix I just want to know why its happening.

Where did you place this? GTGE wants you to place this inside your update(long) method, by the way.

Could it be that you didn't move the enemy or the bullet at all? If that's the case, when update(long) fires, it keeps updating the enemy damage because it hasn't moved at all - because they still intersect (if both haven't moved, and they both intersect, then you'll get the hit)

Oh I see. I made it so that when when it hits the bullets are supposed to stop drawing themselves, but I think the hitbox remains there. Well I think I got a solution worked out but for now I'll just get rid of the code and make it so the bullet passes through.