Question

How can i check the colors of specific pixels in the image?
The example of what im looking for is map generating from a png file in this link

Answer 1

First hit on Google: Getting and Setting Pixels in a Buffered Image

// Get a pixel
int rgb = bufferedImage.getRGB(x, y);

// Get all the pixels
int w = bufferedImage.getWidth(null);
int h = bufferedImage.getHeight(null);
int[] rgbs = new int[w*h];
bufferedImage.getRGB(0, 0, w, h, rgbs, 0, w);

You can also go through the bufferedImage.getRaster().getPixel(...) method.