1    package ip.transforms; 
2     
3     
4    import java.awt.*; 
5    import java.util.Enumeration; 
6    import java.util.Vector; 
7     
8     
9    public class Polygons { 
10       private Vector v = new Vector(); 
11       private Enumeration e = null; 
12    
13       public void addElement(Polygon p) { 
14           v.addElement(p); 
15       } 
16    
17       public void removeElementAt(int i) { 
18           v.removeElementAt(i); 
19       } 
20    
21       public Polygon elementAt(int i) { 
22           return (Polygon) v.elementAt(i); 
23       } 
24    
25       public boolean hasMore() { 
26           return e.hasMoreElements(); 
27       } 
28    
29       public Polygon next() { 
30           if (e == null) e = getEnumeration(); 
31           if (!hasMore()) return null; 
32           return (Polygon) e.nextElement(); 
33       } 
34    
35       private Enumeration getEnumeration() { 
36           return v.elements(); 
37       } 
38    
39       public int size() { 
40           return v.size(); 
41       } 
42    
43       public void drawPolys(Graphics g) { 
44           g.setColor(Color.green); 
45           Polygon p; 
46           for (int i = 0; i < v.size(); i++) { 
47               p = (Polygon) v.elementAt(i); 
48               g.drawPolyline(p.xpoints, p.ypoints, p.npoints); 
49           } 
50       } 
51    
52       public void listPolys() { 
53           for (int i = 0; i < v.size(); i++) 
54               printPoly((Polygon) v.elementAt(i)); 
55       } 
56    
57       private void printPoly(Polygon p) { 
58           System.out.println("i x y"); 
59           int n = p.npoints; 
60           for (int i = 0; i < n - 1; i++) 
61               System.out.println(i + " " + p.xpoints[i] + " " + p.ypoints[i]); 
62           System.out.println(n - 1 + " " + p.xpoints[n - 1] + " " + p.ypoints[n - 1]); 
63       } 
64    
65       public static void drawPoly(Graphics g, Polygon p) { 
66           g.setColor(Color.green); 
67           g.drawPolyline(p.xpoints, p.ypoints, p.npoints); 
68       } 
69    
70       public void polyStats() { 
71           int numberOfPolys = size(); 
72           Polygon p; 
73           int n = 0; 
74           int maxN = 0; 
75           int minN = 10000; 
76           for (int i = 0; i < numberOfPolys; i++) { 
77               p = (Polygon) elementAt(i); 
78               n += p.npoints; 
79               if (p.npoints > maxN) maxN = p.npoints; 
80               if (p.npoints < minN) minN = p.npoints; 
81           } 
82    
83           int avgSize = n / numberOfPolys; 
84           System.out.println("numberOfPolys=" + numberOfPolys); 
85           System.out.println("numberOfPoints=" + n); 
86           System.out.println("avgSize=" + avgSize); 
87           System.out.println("maxN=" + maxN); 
88           System.out.println("minN=" + minN); 
89       } 
90    
91    
92   } 
93    
94    
95    
96