1 public void draw1(int x1, int y1, int x2, int y2,int depth) {//科赫曲线   keleyi.com
 2         g.drawLine(x1, y1, x2, y2);
 3         if (depth<=1)
 4             return;
 5         else {//得到三等分点
 6             double x11 = (x1 * 2  + x2)  / 3;
 7             double y11 = (y1 * 2  + y2) / 3;
 8
 9             double x22 = (x1 + x2 * 2) / 3;
10             double y22 = (y1 + y2 * 2) / 3;
11
12             double x33 = (x11 + x22) / 2 - (y11 - y22) * Math.sqrt(3) / 2;
13             double y33 = (y11 + y22) / 2 - (x22 - x11) * Math.sqrt(3) / 2;
14
15             g.setColor(j.getBackground());
16             g.drawLine((int) x1, (int) y1, (int) x2, (int) y2);
17             g.setColor(Color.black);
18             draw1((int) x1, (int) y1, (int) x11, (int) y11,depth-1);
19             draw1((int) x11, (int) y11, (int) x33, (int) y33,depth-1);
20             draw1((int) x22, (int) y22, (int) x2, (int) y2,depth-1);
21             draw1((int) x33, (int) y33, (int) x22, (int) y22,depth-1);
22         }
23     } 

 1 public void draw2(int x1, int y1, int m,int depth) {//正方形 keleyi.com
 2         g.fillRect(x1, y1, m, m);
 3         m = m / 3;
 4         if (depth<=1)
 5             return;
 6         else{
 7         double x11 = x1 - 2 * m;
 8         double y11 = y1 - 2 * m;
 9
10         double x22 = x1 + m;
11         double y22 = y1 - 2 * m;
12
13         double x33 = x1 + 4 * m;
14         double y33 = y1 - 2 * m;
15
16         double x44 = x1 - 2 * m;
17         double y44 = y1 + m;
18
19         double x55 = x1 + 4 * m;
20         double y55 = y1 + m;
21
22         double x66 = x1 - 2 * m;
23         double y66 = y1 + 4 * m;
24
25         double x77 = x1 + m;
26         double y77 = y1 + 4 * m;
27
28         double x88 = x1 + 4 * m;
29         double y88 = y1 + 4 * m;
30
31         draw2((int) x11, (int) y11, (int) m,depth-1);
32
33         draw2((int) x22, (int) y22, (int) m,depth-1);
34
35         draw2((int) x33, (int) y33, (int) m,depth-1);
36
37         draw2((int) x44, (int) y44, (int) m,depth-1);
38
39         draw2((int) x55, (int) y55, (int) m,depth-1);
40
41         draw2((int) x66, (int) y66, (int) m,depth-1);
42
43         draw2((int) x77, (int) y77, (int) m,depth-1);
44
45         draw2((int) x88, (int) y88, (int) m,depth-1);
46         }
47
48     }  

 1 public void draw3(int x1,int y1,int x2,int y2,int x3,int y3,int depth){//三角形   keleyi.com
 2
 3         double s = Math.sqrt((x2 - x1) * (x2 - x1) + (y2 - y1) * (y2 - y1));
 4         g.drawLine(x1,y1,x2,y2);
 5         g.drawLine(x2,y2,x3,y3);
 6         g.drawLine(x1,y1,x3,y3);
 7 //      if(s<3)
 8 //          return;
 9         if (depth<=1)
10             return;
11         else
12         {
13         /*
14          * 上面的三角形
15          */
16         double x11=(x1*3+x2)/4;
17         double y11=y1-(s/4)*Math.sqrt(3);
18
19         double x12=(x1+x2*3)/4;
20         double y12=y11;
21
22         double x13=(x1+x2)/2;
23         double y13=y1;
24
25         /*
26          * 左边的三角形
27          */
28         double x21=x1-s/4;
29         double y21=(y1+y3)/2;
30
31         double x22=x1+s/4;
32         double y22=y21;
33
34         double x23=x1;
35         double y23=y3;
36
37         /*
38          * 右边的三角形
39          */
40         double x31=x2+s/4;
41         double y31=(y1+y3)/2;
42
43         double x32=x2-s/4;
44         double y32=y21;
45
46         double x33=x2;
47         double y33=y3;
48
49
50         draw3((int)x11,(int)y11,(int)x12,(int)y12, (int)x13, (int)y13, depth-1);
51         draw3((int)x21,(int)y21,(int)x22,(int)y22, (int)x23, (int)y23, depth-1);
52         draw3((int)x31,(int)y31,(int)x32,(int)y32, (int)x33, (int)y33, depth-1);
53         }
54     }