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Thread: Java Challenge on A Gradient Color Canvas

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    Default Java Challenge on A Gradient Color Canvas

    This is probably an elementary question. However, I have completed reading the 9th Chapter of Java Programming for the Absolute Beginner and have approached the Challenges section. I cannot quite get the progam to show a gradient from dark to light.

    I mainly need help with my main method as this is where the problem is located.

    The question asks:

    "Create a Canvas that paints a gradient that's dark on one side and slowly gets lighter as it moves to the other side."

    I do not know JFrame, Swing, Points, JPanels, BufferedImage, or GradientPaint.

    Thank you very much for your time and cooperation reagrding this matter.

    HERE IS THE CODE:
    import java.awt.*;
     
    public class ColorfulShape extends GUIFrame {
     
    	Canvas digital;
    	public final static int MIN = 0,
    							  MAX = 255;
    	int r, g, b;
    	Color paintr = new Color(0, 0, 0);
     
    	public ColorfulShape(int r, int g, int b) {
    		super("Colorful Shape");
    		r = r >= MIN && r <= MAX ? r : MIN;
    		g = g >= MIN && g <= MAX ? g : MIN;
    		b = r >= MIN && b <= MAX ? b : MIN;
    		digital = new Canvas();
    		digital.setBackground(new Color(r, g, b));
    		digital.setSize(200, 150);
    		add(digital, BorderLayout.CENTER);
     
    		pack();
    		setVisible(true);
    	}
     
     
    	public static void main(String args[]) {
    new ColorfulShape(0, 0, 0);
    }
    	public void paint(Graphics g) {
    	for(int i=MIN; i<=MAX; i++) {
    		paintr = paintr.brighter();
    	}
    	}
    }
    Last edited by Norm; January 2nd, 2013 at 07:43 AM. Reason: added code tags


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    Default Re: Java Challenge on A Gradient Color Canvas

    I do not know JFrame, Swing, Points, JPanels, BufferedImage, or GradientPaint.
    Take a look at the tutorial:
    Trail: Creating a GUI With JFC/Swing (The Java™ Tutorials)
    If you don't understand my answer, don't ignore it, ask a question.

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