nested circles with different colors

[Mohamad Samy]

I have the following problem, I want to paint many circles nested in each other but when a new circle is painted it will be with a different color from the previous one so, the result is many circles with two colors
the following code when executed, it gave my only one big circle with the same color, I don't know why

//6.1 colored circles
import java.awt.Graphics;
import javax.swing.JPanel;
import java.awt.Color;
import java.util.Random;
public class Circles extends JPanel
{
	public void paintComponent(Graphics g)
	{
		super.paintComponent(g);
		int width = getWidth();
		int height = getHeight();
		Random random = new Random();
		Color cOne = new Color(random.nextInt(255), random.nextInt(255), random.nextInt(255));
		Color cTwo = new Color(random.nextInt(255), random.nextInt(255), random.nextInt(255));
		int x = width/2-10;
		int y = height/2-10;
		int j = width/2-15;
		int k = height/2-15;
		for(int i =0; i <=20; ++i)
		{
				g.setColor(cOne);
				g.fillOval(x, y, 20+i*10, 20+i*10);
				g.setColor(cTwo);
				g.fillOval(j, k, 30+i*10, 30+i*10);
			//coordinates for the first circle
				x = width/2 - (20+i*10)/2;
				y = height/2-(20+i*10)/2;
				//coordinates for the seconds circle
				j = width/2 - (30+i*10)/2;
				k = height/2-(30+i*10)/2;
		}
			
	}
}

[Ulf Dittmer]

That the color is the same every time is understandable - you're only using a single one. You'll have to move lines 14 and 15 into the loop to choose different ones.

[Paweł Baczyński]

Draw them in order from biggest to lowest. Not from lowest to biggest.

[Mohamad Samy]

what a trick. thanks man for good tip.

[Campbell Ritchie]

It should be obvious. Try it with circles of coloured paper and it becomes obvious you lay the largest one down first.

I am moving this discussion to the GUIs forum.