Writing Classes - Java Software Solutions: Foundations of Program Design - page 187

LISTING 4.8
//********************************************************************
// SplatPanel.java Author: Lewis/Loftus
//
// Demonstrates the use of graphical objects.
//********************************************************************
import javax.swing.*;
import java.awt.*;
public class SplatPanel extends JPanel
{
private Circle circle1, circle2, circle3, circle4, circle5;
//-----------------------------------------------------------------
// Constructor: Creates five Circle objects.
//-----------------------------------------------------------------
public SplatPanel()
{
circle1 = new Circle (30, Color.red, 70, 35);
circle2 = new Circle (50, Color.green, 30, 20);
circle3 = new Circle (100, Color.cyan, 60, 85);
circle4 = new Circle (45, Color.yellow, 170, 30);
circle5 = new Circle (60, Color.blue, 200, 60);
setPreferredSize ( new Dimension(300, 200));
setBackground (Color.black);
}
//-----------------------------------------------------------------
// Draws this panel by requesting that each circle draw itself.
//-----------------------------------------------------------------
public void paintComponent (Graphics page)
{
super .paintComponent(page);
circle1.draw(page);
circle2.draw(page);
circle3.draw(page);
circle4.draw(page);
circle5.draw(page);
}
}