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

// This code is responsible for displaying the Balls
public class BallPanel extends JPanel { 
    public static final int WIDTH = 800;
    public static final int HEIGHT = 600;
    
    private static Ball[] balls;
    
    public BallPanel(Ball[] b) {
        balls = b;
        setPreferredSize(new Dimension(WIDTH, HEIGHT));
    }
    
    // Display the image
    public void paintComponent(Graphics g) {
        super.paintComponent(g);
        for (int i=0; i<balls.length; i++) {
            g.setColor(Color.RED);
            g.fillOval(balls[i].x-balls[i].radius, 
                       balls[i].y-balls[i].radius, 
                       balls[i].radius*2, 
                       balls[i].radius*2);
            g.setColor(Color.BLACK);
            g.drawOval(balls[i].x-balls[i].radius, 
                       balls[i].y-balls[i].radius, 
                       balls[i].radius*2, 
                       balls[i].radius*2);
        }
    }
}