由于“ 1、2、3”与“ 2、1、3”不同，因此我建议使用以下代码段。请注意，为了避免出现“ 1、1、1”或“ 1、3、3”情形，我不能与j或k相同。
// array with elements char[] items = {'a', 'b', 'c', 'd', 'e'}; int count = 0; // first of the "three" for (int i = 0; i < upperBound; i++) { // second of the "three" for (int j = 0; j < upperBound; j++) { // can't be identical to i if (j == i) continue; // third of the "three" for (int k = 0; k < upperBound; k++) { // can't be identical to i or j if (k == i || k ==j) continue; // print some display System.out.println(items[i] + ", " + items[j] + ", " + items[k]); // increment the total count count++; } } } System.out.println("Total count is " + count);
