diff options
Diffstat (limited to 'sample/duplicate/Ball.java')
| -rw-r--r-- | sample/duplicate/Ball.java | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/sample/duplicate/Ball.java b/sample/duplicate/Ball.java new file mode 100644 index 00000000..21d6e1cf --- /dev/null +++ b/sample/duplicate/Ball.java @@ -0,0 +1,44 @@ +package sample.duplicate;
+
+import java.awt.Graphics;
+import java.awt.Color;
+
+public class Ball {
+ private int x, y;
+ private Color color;
+ private int radius = 30;
+ private boolean isBackup = false;
+
+ public Ball(int x, int y) {
+ move(x, y);
+ changeColor(Color.orange);
+ }
+
+ // This constructor is for a backup object.
+ public Ball(Ball b) {
+ isBackup = true;
+ }
+
+ // Adjust the position so that the backup object is visible.
+ private void adjust() {
+ if (isBackup) {
+ this.x += 50;
+ this.y += 50;
+ }
+ }
+
+ public void paint(Graphics g) {
+ g.setColor(color);
+ g.fillOval(x, y, radius, radius);
+ }
+
+ public void move(int x, int y) {
+ this.x = x;
+ this.y = y;
+ adjust();
+ }
+
+ public void changeColor(Color color) {
+ this.color = color;
+ }
+}
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