accessing a variable from another class

Very simple question but I can’t do it. I have 3 classes:

DrawCircle class

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

class DrawCircle extends JPanel
{
    private int w, h, di, diBig, diSmall, maxRad, xSq, ySq, xPoint, yPoint;
    public DrawFrame d;

    public DrawCircle()
    {
        w = 400;
        h = 400;
        diBig = 300;
        diSmall = 10;
        maxRad = (diBig/2) - diSmall;
        xSq = 50;
        ySq = 50;
        xPoint = 200;
        yPoint = 200;
    }

    public void paintComponent(Graphics g)
    {
        super.paintComponent(g);
        g.setColor(Color.blue);
        g.drawOval(xSq, ySq, diBig, diBig);

        for(int y=ySq; y<ySq+diBig; y=y+diSmall*2)
        {
            for(int x=xSq; x<w-xSq; x=x+diSmall)
            {
                if(Math.sqrt(Math.pow(yPoint-y,2) + Math.pow(xPoint-x, 2))<= maxRad)
                    {
                        g.drawOval(x, y, diSmall, diSmall);
                    }               
            }
        }

        for(int y=ySq+10; y<ySq+diBig; y=y+diSmall*2)
        {
            for(int x=xSq+5; x<w-xSq; x=x+diSmall)
            {
                if(Math.sqrt(Math.pow(yPoint-y,2) + Math.pow(xPoint-x, 2))<= maxRad)
                {
                    g.drawOval(x, y, diSmall, diSmall);
                }   
            }
        }
    }
}

DrawFrame class

public class DrawFrame extends JFrame
{
    public DrawFrame()
    {
        int width = 400;
        int height = 400;

        setTitle("Frame");
        setSize(width, height);

        addWindowListener(new WindowAdapter()
        {
            public void windowClosing(WindowEvent e)
            {
                System.exit(0);
            }
        });

        Container contentPane = getContentPane();
        contentPane.add(new DrawCircle());
    }
}

CircMain class

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

public class CircMain 
{
    public static void main(String[] args)
    {
        JFrame frame = new DrawFrame();
        frame.show();
    }
}

One class creates a frame, the other draws a circle and fills it with smaller circles. In DrawFrame I set width and height. In DrawCircle I need to access the width and height of DrawFrame. How do I do this?

I’ve tried making an object and tried using .getWidth and .getHeight but can’t get it to work. I need specific code here because I’ve tried a lot of things but can’t get it to work. Am I declaring width and height wrong in DrawFrame? Am creating the object the wrong way in DrawCircle?

Also, the variables i use in DrawCircle, should I have them in the constructor or not?