leecode刷题（4）-- 存在重复数组

import java.util.Arrays;

public class ContainsDuplicate {
    public boolean containsDuplicate(int[] nums) {
        if(nums.length == 0) {
            return false;
        }
        Arrays.sort(nums);
        for(int i = 0; i < nums.length - 1; i++) {
            if(nums[i] == nums[i+1]) {
                return true;
            }
        }
        return false;
    }
    
    public static void main(String[] args) {
        int[] nums = {1,2,3,1};
        ContainsDuplicate containsDuplicate = new ContainsDuplicate();
        boolean a = containsDuplicate.containsDuplicate(nums);
        System.out.println(a);      
    }
}