MouseListener ArrayOutOfBoundsException

Newbie & Debugging Questions
#1

Hello JGO,

Recently, I have been working on a game which involves moving a spite towards another sprite using a MouseListener, then hiding the first sprite. So far, I’ve tried doing this:


// mouseX and mouseY are the mouse's X and Y.
if (level.getMap(mouseX, mouseY).equals("1")) { // "1" stands for the 2nd sprite
			c.goAway();
}

The getMap() method takes an x and a y value. This is what happens when I run the program.

Can anyone help me with this error?

Thanks,

DarkCart

#2

Hi

I think I have an idea what your issue may be, but a pastebin would be easier to read than a gif.

EDIT: The issue is definitely how you get the Y value on line 46. Please post the code to get that value.

CopyableCougar4

#3

Your map array is only 20 long. The mouse coordinates are in pixels, which means that as soon as you move your mouse past 20 pixels, you will get a crash. I think that you are trying to get the tile that the mouse is over. If this is the case, then divide the mouse coordinates by the tile size.

#4

Thank you, this helps, but now it throws my collision detection off.