Generate some unique random integers

GenRandom.java

public class GenRandom {
  public Integer[] generateDifferentRandomNums(int numRandom, int integerLimit) {
        int[] num = new int[numRandom];
        Set<Integer> nums = new HashSet<>();

        while (nums.size() < numRandom) {
            nums.add(new Random().nextInt(integerLimit));
        }

        return Arrays.asList(nums.toArray()).toArray(new Integer[0]);
   }
}