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1 import java.applet.*;
2 import java.awt.*;
3 import JSci.maths.chaos.*;
4
5
10 public final class KochSnowflakePlot extends Applet {
11 private final int N=5;
12 private Image img;
13 private KochCurveGraphic curve;
14 private int width, height;
15 public void init() {
16 width=getSize().width;
17 height=getSize().height;
18 img=createImage(width, height);
19 curve=new KochCurveGraphic(img.getGraphics());
20 final int len=width/2;
21 final int h_2=(int)Math.round(len*Math.sqrt(3.0)/4.0);
22 curve.draw((width-len)/2, height/2-h_2, width/2, height/2+h_2, N);
23 curve.draw(width/2, height/2+h_2, (width+len)/2, height/2-h_2, N);
24 curve.draw((width+len)/2, height/2-h_2, (width-len)/2, height/2-h_2, N);
25 }
26 public void paint(Graphics g) {
27 g.drawImage(img, 0, 0, this);
28 }
29 class KochCurveGraphic extends KochCurve {
30 private final Graphics g;
31 public KochCurveGraphic(Graphics grafixs) {
32 g=grafixs;
33 }
34 public void draw(int startX, int startY, int endX, int endY, int n) {
35 g.setColor(Color.black);
36 g.drawLine(startX, height-startY, endX, height-endY);
37 recurse(startX, startY, endX, endY, n);
38 }
39 protected void drawLine(double startX, double startY, double endX, double endY) {
40 g.drawLine((int)Math.round(startX), height-(int)Math.round(startY), (int)Math.round(endX), height-(int)Math.round(endY));
41 }
42 protected void eraseLine(double startX, double startY, double endX, double endY) {
43 g.setColor(getBackground());
44 drawLine(startX, startY, endX, endY);
45 g.setColor(Color.black);
46 }
47 }
48 }
49
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Java API By Example, From Geeks To Geeks.