[리트코드/자바] 1929. Concatenation of Array

class Solution {
    public int[] getConcatenation(int[] nums) {
        int[] result = new int[nums.length * 2];
        
        System.arraycopy(nums, 0, result, 0, nums.length);
        System.arraycopy(nums, 0, result, nums.length, nums.length);

        return result;
    }
}

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

        return result;
    }
}