import java.awt.Graphics;
import java.awt.Color;
    import javax.swing.JComponent;
	 import javax.swing.JFrame;
	 import java.awt.image.BufferedImage;

public class Test {
	public static void main(String[] args){
		int n = 100;
		float[][] map = new float[n][n];

		for(int i=0; i<n;i++){
			for(int j=0; j<n;j++){
				map[i][j] = (float) Math.random();
			}
		}
		showImage(map);
	}

	public static void showImage(float[][] map){




		float maxHeight = Float.MIN_VALUE;
		float minHeight = Float.MAX_VALUE;
		for (float[] row : map){
			for (float height : row){
				if (height > maxHeight){
					maxHeight = height;
				}
				if (height < minHeight){
					minHeight = height;
				}
			}
		}
		int size = map.length;
		final BufferedImage image = new BufferedImage(size, size, BufferedImage.TYPE_INT_RGB);
		for (int x = 0; x < size; x++){
			for (int y = 0; y < size; y++){
				Color color = Color.getHSBColor((float)((map[x][y] - minHeight)/(maxHeight - minHeight)), 1, 1);
				image.setRGB(x,y,color.getRGB());
			}
		}
		JFrame frame = new JFrame("Picture");
		frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		frame.add(new JComponent(){

			@Override
			public void paint(Graphics g){
				g.drawImage(image, 0, 0, getWidth(), getHeight(), null);
			}

		});
		frame.setVisible(true);
	}
}