1 int arr[] = { 1, 2, 4, 9 };
 2         for (int i = 0, num = 0; i < arr.length; i++) {
 3             for (int j = 0; j < arr.length; j++) {
 4                 for (int k = 0; k < arr.length; k++) {
 5                     if (arr[i] == arr[j])
 6                         continue;
 7                     if
 
 (arr[j] == arr[k])
 8                         continue;
 9                     if (arr[i] == arr[k])
10                         continue;
11                     num++;
12                     System.out.println("第" + num + "個" + arr[i] + " " + arr[j] + " " + arr[k]);
13                 }
14             }
 
15         }