返回数组java中的唯一数字

import java.util.HashSet;

public class UniqueNumber {
    public static int[] getUniqueNumbers(int[] nums) {
        HashSet<Integer> uniqueSet = new HashSet<>();
        
        for (int num : nums) {
            if (uniqueSet.contains(num)) {
                uniqueSet.remove(num);
            } else {
                uniqueSet.add(num);
            }
        }
        
        int[] uniqueArray = new int[uniqueSet.size()];
        int index = 0;
        for (int num : uniqueSet) {
            uniqueArray[index++] = num;
        }
        
        return uniqueArray;
    }
    
    public static void main(String[] args) {
        int[] nums = {1, 2, 3, 4, 5, 2, 4, 6};
        int[] uniqueNumbers = getUniqueNumbers(nums);
        
        System.out.println("Unique numbers:");
        for (int num : uniqueNumbers) {
            System.out.println(num);
        }
    }
}