Get a list of combinations of lists' elements

Question

Suppose I have 3 lists: [\'q\',\'w\'], [\'a\',\'s\'], [\'z\',\'x\']. How to get a list of possible combinations out of these lists? So I get a list [[\'q\',\'a\',\'z\'],[\'q

Answer 1

For the lazy (using Guava):

Set> result = Sets.cartesianProduct(
                ImmutableSet.of("q", "w"),
                ImmutableSet.of("a", "s"),
                ImmutableSet.of("z", "x")
        );

System.out.println(result);

output:

[ [q, a, z], [q, a, x], [q, s, z], [q, s, x], [w, a, z], [w, a, x], [w, s, z], [w, s, x] ]