数组判断任意出现的重复值

public class Solution {
    public static void main(String[] args) {        int[] nums = new int[]{-2, 1, -3, 4, -1, 2, 1, -5, 4};//        System.out.println(containsDuplicate(nums));        System.out.println(containsDuplicate(nums));    }
    /**     * 给你一个整数数组nums,如果任一值在数组中出现至少两次,返回true;如果数组中每个元素互不相同,返回false     *     * @param nums     * @return     */    public static boolean containsDuplicate(int[] nums) {        Set set = new HashSet();        for (int i : nums) {            set.add(i);        }        return nums.length > set.size() ? true : false;    }}

true
Process finished with exit code 0