help changing the RGB of a fillRect

[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?

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);
  	}
}

[JosAH]

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?

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

[AnimeKitty]

Got it! :)
Thanks JosAH

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);
      		}
    	}
}

[JosAH]

Got it! :)
Thanks JosAH

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);
      		}
    	}
}

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

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

just a tip ;-)

kind regards,

Jos