1package sample.duplicate;
2
3import java.awt.Graphics;
4import java.awt.Color;
5
6public class Ball {
7    private int x, y;
8    private Color color;
9    private int radius = 30;
10    private boolean isBackup = false;
11
12    public Ball(int x, int y) {
13	move(x, y);
14	changeColor(Color.orange);
15    }
16
17    // This constructor is for a backup object.
18    public Ball(Ball b) {
19	isBackup = true;
20    }
21
22    // Adjust the position so that the backup object is visible.
23    private void adjust() {
24	if (isBackup) {
25	    this.x += 50;
26	    this.y += 50;
27	}
28    }
29
30    public void paint(Graphics g) {
31	g.setColor(color);
32	g.fillOval(x, y, radius, radius);
33    }
34
35    public void move(int x, int y) {
36	this.x = x;
37	this.y = y;
38	adjust();
39    }
40
41    public void changeColor(Color color) {
42	this.color = color;
43    }
44}
45