ColorPan.java Source code

Introduction

Here is the source code for ColorPan.java

Source

import java.awt.Graphics;
import java.awt.image.BufferedImage;

import javax.swing.JComponent;
import javax.swing.JFrame;

public class ColorPan extends JComponent {
    public void paint(Graphics g) {
        int width = getSize().width;
        int height = getSize().height;
        int[] data = new int[width * height];
        int i = 0;
        for (int y = 0; y < height; y++) {
            int red = (y * 255) / (height - 1);
            for (int x = 0; x < width; x++) {
                int green = (x * 255) / (width - 1);
                int blue = 128;
                data[i++] = (red << 16) | (green << 8) | blue;
            }
        }
        BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
        image.setRGB(0, 0, width, height, data, 0, width);
        g.drawImage(image, 0, 0, this);
    }

    public static void main(String[] args) {
        JFrame frame = new JFrame("ColorPan");
        frame.getContentPane().add(new ColorPan());
        frame.setSize(300, 300);
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setVisible(true);
    }
}