Barnsley fern: Difference between revisions

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@@ Line 28: / Line 28: @@
 {{works with|Java|8}}
 <lang java>import java.awt.*;
-import java.util.ArrayList;
+import java.awt.image.BufferedImage;
 import javax.swing.*;
 public class BarnsleyFern extends JPanel {
+    BufferedImage img;
-    ArrayList<Point> points = new ArrayList<>();
     public BarnsleyFern() {
@@ Line 39: / Line 39: @@
         setPreferredSize(new Dimension(dim, dim));
         setBackground(Color.white);
+        img = new BufferedImage(dim, dim, BufferedImage.TYPE_INT_ARGB);
-        setForeground(Color.green.darker());
         createFern(dim, dim);
     }
@@ Line 67: / Line 67: @@
             y = tmpy;
-            points.add(new Point((int) Math.round(w / 2 + x * 60),
+            img.setRGB((int) Math.round(w / 2 + x * w / 11),
-                    (int) Math.round(h - y * 60)));
+                    (int) Math.round(h - y * h / 11), 0xFF32CD32);
-        }
-    }
-    void drawFern(Graphics2D g) {
-        for (Point p : points) {
-            g.fillOval(p.x, p.y, 1, 1);
         }
     }
@@ Line 85: / Line 79: @@
                 RenderingHints.VALUE_ANTIALIAS_ON);
-        drawFern(g);
+        g.drawImage(img, 0, 0, null);
     }