Question

How to generate all possible combinations of a set of numbers?

Answer 1

or example, there are six permutations of the set {1,2,3}, namely (1,2,3), (1,3,2), (2,1,3), (2,3,1), (3,1,2), and (3,2,1). Here is the source code of the Java Program to Generate All Possible Combinations of a Given List of Numbers