如何在循环数组后只输出一次元素？

import java.util.HashSet;

public class UniqueElementsInCircularArray {
    public static void main(String[] args) {
        int[] nums = {2, 4, 6, 8, 2, 4, 6, 8};
        printUniqueElements(nums);
    }

    public static void printUniqueElements(int[] nums) {
        HashSet<Integer> set = new HashSet<>();

        for (int num : nums) {
            if (!set.contains(num)) {
                System.out.println(num);
                set.add(num);
            }
        }
    }
}