请求大佬支援!!!递归返回错误

Question

请问结果应该是38，为什么返回26？

    public static void main(String[] args) {
        int[] a = {2,5,3,9,12,7};
        System.out.println(test2(a,a.length-1));
    }

    private static int test2(int[] a,int i) {

        if(i==0) 
            return a[0];

        int x = test(a, i-1);

        return x+a[i];

    }

Answer 1

public static void main(String[] args) {
        int[] a = {2,5,3,9,12,7};
        System.out.println(test2(a,a.length-1));
    }

    private static int test2(int[] a,int i) {

        if(i==0) 
            return a[0];

        int x = test2(a, i-1);

        return x+a[i];

    }

返回38