Leetcode 1929 - Concatenation of Array solution

Solution One:

class Solution:
    def getConcatenation(self, nums: List[int]) -> List[int]:
        return nums * 2

Solution Two:

class Solution {
    public int[] getConcatenation(int[] nums) {
        int len = nums.length;
        int[] nums2 = new int[len*2];
        
        for(int i = 0; i < len; i++) {
            nums2[i] = nums[i];
            nums2[i + len] = nums[i];
        }
        
        return nums2;
    }
}