Create Non Repeated Words?

I wrote a code for a "skydiving" program that randomly selects the "maneuvers" to be performed by the skydiver during his skydive. I am almost done with the program. I just need to figure out how to print non repeated maneuvers for each round. Each round may not consist of two of the same maneuvers. The program that I wrote randomly picks the maneuvers but sometimes it still prints out two of the same maneuvers for each round.

The following is my code

import java.util.Scanner;
import java.util.Random;
///v.0
public class Testpart2 {
public static void main(String[] args) {
Random randomNumbers=new Random();

[code]....