help changing the RGB of a fillRect

I have written this program that makes a JPanel that creates random black and white pixels using a fillRect but now I would like to make random colors instead. How would I set the RGB values of an individual fillRect?

Code:

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import java.util.Random;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.Graphics2D;
import javax.swing.JFrame;
import javax.swing.JPanel;

public class Basic extends JPanel {
        public void paintComponent(Graphics g) {
                super.paintComponent(g);
                Graphics2D graphics = (Graphics2D) g;
                graphics.setColor(Color.black);

                Dimension size = getSize();
            Random number = new Random();

            int image[][];
                int a = 0;
   
                for (int x = 0; x < size.width; x++) {
                    for (int y = 0; y < size.height; y++) {
                                a = number.nextInt(2);
                          graphics.fillRect(x, y, a, a);
                      }
                }
          }

          public static void main(String[] args) {
                Basic basic = new Basic();
                basic.setPreferredSize(new Dimension(400, 400));
                JFrame frame = new JFrame("Basic");
                frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
                frame.add(basic);
                frame.pack();
                frame.setLocationRelativeTo(null);
                frame.setVisible(true);
          }
}

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Quote:

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Originally Posted by AnimeKitty

I have written this program that makes a JPanel that creates random black and white pixels using a fillRect but now I would like to make random colors instead. How would I set the RGB values of an individual fillRect?

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Basically you want to generate a (pseudo) random color; have a look the Color API and the Random class API documentation; generating a (pseudo) random number in the range [0, 0xffffff] isn't rocket science.

kind regards,

Jos

Got it! :)
Thanks JosAH

Code:

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public void paintComponent(Graphics g) {
            super.paintComponent(g);
            Graphics2D graphics = (Graphics2D) g;
            Dimension size = getSize();

        Random r = new Random();
        int image[][];
            int a = 0;

            for (int x = 0; x < size.width; x++) {
                    for (int y = 0; y < size.height; y++) {
                                a = r.nextInt(2);
                          graphics.fillRect(x, y, a, a);
                          Color  c = new Color(r.nextInt(256), r.nextInt(256), 
                        r.nextInt(256));
                                graphics.setColor(c);
                      }
            }
}

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Quote:

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Originally Posted by AnimeKitty

Got it! :)
Thanks JosAH

Code:

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public void paintComponent(Graphics g) {
            super.paintComponent(g);
            Graphics2D graphics = (Graphics2D) g;
            Dimension size = getSize();

        Random r = new Random();
        int image[][];
            int a = 0;

            for (int x = 0; x < size.width; x++) {
                    for (int y = 0; y < size.height; y++) {
                                a = r.nextInt(2);
                          graphics.fillRect(x, y, a, a);
                          Color  c = new Color(r.nextInt(256), r.nextInt(256), 
                        r.nextInt(256));
                                graphics.setColor(c);
                      }
            }
}

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Good, there's another Color constructor that takes a single int representing the rgb values so you can create one as:

Code:

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Color c= new Color(r.nextInt(0x1000000));

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just a tip ;-)

kind regards,

Jos