Formatting JPanel's

[xterradaniel]

EDIT: Never mind I figured out what to do to get the results I wanted. It came to me less than a minute after finishing my post.

Thanks anyway...

Hello all,
I wrote the required program that I must turn in tomorrow. However I have one hangup, I am supposed to simply write a program that displays a 3 x 3 grid. I have that done. But, I was wondering how I can get the 2nd lines, both the horizontal and vertical, to automatically re-orientate themselves when the pane is dragged to a new size.

What I did for the first horizontal and vertical line is this:
g.drawLine(width / 3, 0, width / 3, height); >>> 1st vertical line
g.drawLine(0, height / 3, width, height / 3); >>> 1st horizontal line

I cant think of what to do to the 2nd horizontal and vertical lines to get them to re-orientate on their own, I mean I can set them to a fixed spot but if I drag the pane then they end up as broken lines.

If I could use floating point numbers I would just multiply by 0.33, but to my understanding I can't cast the coordinates, they must be integer.

I have to get past problems like this easier, lol.

My code thus far:

import java.awt.Color;
import java.awt.Graphics;
import javax.swing.*;

public class Exercise15_01 extends JFrame {

    public Exercise15_01() {
        add(new threeByThreePanel());
    }

    public static void main(String[] args) {
        Exercise15_01 frame1 = new Exercise15_01();
        frame1.setSize(300, 300);
        frame1.setTitle("3 x 3 Grid");
        frame1.setLocationRelativeTo(null);
        frame1.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame1.setVisible(true);

    }
}

class threeByThreePanel extends JPanel {

    @Override
    protected void paintComponent(Graphics g) {
        super.paintComponent(g);
        int width = getWidth();
        int height = getHeight();
        g.setColor(Color.red);
        g.drawLine(width / 3, 0, width / 3, height);
        g.drawLine(200, 0, 200, 300);
        g.setColor(Color.blue);
        g.drawLine(0, height / 3, width, height / 3);
        g.drawLine(0, 200, 300, 200);

    }
}

Improved, and desired, code:

int width = getWidth();
        int height = getHeight();
        g.setColor(Color.red);
        g.drawLine(width/ 3, 0, width/ 3, height);
        g.drawLine(width - width/ 3, 0, width - width/ 3, height);
        g.setColor(Color.blue);
        g.drawLine(0, height / 3, width, height / 3);
        g.drawLine(0,height - height /3,width, height - height / 3  );