How to generate a random permutation in Java?

Question

What is the best way to generate a random permutation of n numbers?

For example, say I have a set of numbers 1, 2 and 3 (n = 3)

Set of all possible permutati

Answer 1

You can try RubyCollect4J

Ruby.Array.of(1, 2, 3).permutation().toA().sample();

It did exactly what you asked for. BTW, I am the author of this Java library.