Writing classes in graphics

[CyberFrog]

Hey,

Have been practising writing classes and having been used passing some parameters through a methd. Now, I am faced with graphics : (

How or what can I pass through in my main for each of the parameters I have defined i.e. Graphics page, int x, int y, int rad, Color color. Obviosuly I know that x, y and rad are intergers but not sure what to pass thru for a graphics page and how to pass thru a color??

Also, I have deliberatley not put a return type in my method but with my new instance in main I am not sure what type to use for the new circle object??

Code:
package Chapter4;

import java.awt.*;
// assumes java.awt.* is imported
public class DrawCircle{
public DrawCircle(){
}
public DrawCircle (Graphics page, int x, int y, int rad, Color color)
{
page.setColor(color);
page.drawOval(x, y, rad, rad);
}
public static void main(String[]args){
DrawCircle circle = new DrawCircle();
newcircle = circle.drawcircle(4,4,4,blue);?????

}
}

[hardwired]

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

public class DrawingGraphics {
    public static void main(String[] args) {
        JFrame f = new JFrame();
        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        f.add(new GraphicComponent());
        f.setSize(300,300);
        f.setLocation(200,200);
        f.setVisible(true);
    }
}

class GraphicComponent extends JPanel {
    DrawCircle drawCircle = new DrawCircle();

    // Java supplies a graphics context which becomes available
    // (non–null) when/after the component becomes visible.
    protected void paintComponent(Graphics g) {
        // Where does the graphics context it come from?
        System.out.println("g = " + g.getClass().getName());
        super.paintComponent(g);
        Graphics2D g2 = (Graphics2D)g;
        g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
                            RenderingHints.VALUE_ANTIALIAS_ON);
        // Now we have a real, live graphics context that we
        // can use for custom drawing/graphics.
        // Draw a resizable, centered circle:
        int w = getWidth();
        int h = getHeight();
        int diameter = 2*Math.min(w, h)/3;
        int x = (w - diameter)/2;
        int y = (h - diameter)/2;
        drawCircle.drawCircle(g, x, y, diameter, Color.red);
    }    
}

class DrawCircle {
    public DrawCircle() { }

    public void drawCircle (Graphics page, int x, int y,
                            int rad, Color color) {
        page.setColor(color);
        page.drawOval(x, y, rad, rad);
    }

    public static void main(String[] args){
        final DrawCircle circle = new DrawCircle();
        JPanel panel = new JPanel() {
            protected void paintComponent(Graphics g) {
                super.paintComponent(g);
                circle.drawCircle(g,25,25,50,Color.blue);
            }
        };
        panel.setPreferredSize(new Dimension(100,100));
        JOptionPane.showMessageDialog(null, panel, "test", -1);
    }
}

[CyberFrog]

Hi Hardwired,
Thanks for your code but am a bit confused since all I wanted to do was to simply manipulate my main the the simplest possible way so that my method could pick it up? Also how can I do this if I did not want to return anything in my method i.e. not even a void?

Thanks