HW7.7

 1 public class Solution
 2 {
 3     public static void main(String[] args)
 4     {
 5         double[][] points =
 6         {
 7             {-1, 0, 3}, {-1, -1, -1},
 8             {4, 1, 1}, {2, 0.5, 9},
 9             {3.5, 2, -1}, {3, 1.5, 3},
10             {-1.5, 4, 2}, {5.5, 4, -0.5}
11         };
12
13         double shortestDistance = distance(points[0][0], points[0][1], points[0][2],
14             points[1][0], points[1][1], points[1][2]);
15         double currentDistance = shortestDistance;
16
17         for(int i = 0; i < points.length; i++)
18         {
19             for(int j = i + 1; j < points.length; j++)
20             {
21                 currentDistance = distance(points[i][0], points[i][1], points[i][2],
22                     points[j][0], points[j][1], points[j][2]);
23                 if(currentDistance < shortestDistance)
24                     shortestDistance = currentDistance;
25             }
26         }
27
28         System.out.println("The shortest distance is " + shortestDistance);
29     }
30
31     public static double distance(double x1, double y1, double z1, double x2, double y2, double z2)
32     {
33         double square = (x2 - x1) * (x2 - x1) + (y2 - y1) * (y2 - y1) + (z2 - z1) * (z2 - z1);
34         return Math.sqrt(square);
35     }
36 }