Coordinates out of bounds

Hey, im struggling trying to find a rough algorithm to get the colour of a pixel from where the mouse has clicked on an image, below is some of the code im working on :

Code:

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//locations clicked
int pixelX,pixelY;

//make the value = area clicked - the position of the image
pixelX = e.getX() - imageXposition;
pixelY = e.getY() - imageYposition;

// get the pixel that was clicked on
image.getRGB(pixelX, pixelY);

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So far it produces odd results, sometimes the results are negative numbers, Im really just looking for a way to check the RGB value anywhere clicked only within the image. Sometimes because of the erratic results of pixelX and y i get an error that the coordinates are out of bounds because the area on an image of 30 pixels cant reach 150. Any help would be fantastic :)

We can't really help you without knowing where/how you're placing the image on the screen, what Component has that MouseListener, etc. If you want help, I'd suggest you provide an SSCCE that demonstrates the problem.

Quote:

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sometimes the results are negative numbers

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Why do you think that's a problem?

db

After trying a number of ways to fix it i ended up solving the problem using an if condition to make sure that all the coordinates had to be > than 0 and less than the width of the image that was selected, thanks for taking a look anyway guys :)