insert an element at index into array

given an array, and an element to insert, and the position to insert this element,
return a new array with the element inserted

1,2,3,4,5,6 -> 1,2,3,15,4,5,6

public static void main(String[] args) {
        int[] org = new int[]{1,2,3,4,5,6} ;
        int[] res = insert(org, 15, 3);
        print(res);
    }

    private static int[] insert(int[] org, int val, int insertIndex ) {
        //note the way to create array: [# of items] = length; the last index = length - 1
        int[] res = new int[org.length+1] ;
        //find the ending index: anything <= remain the same
        int pos = Math.min(insertIndex, org.length) ; //3
        //[1,2,3] remain the same
        for (int i = 0; i < pos ; i++) {
            res[i] = org[i] ;
        }
        //create the new item
        res[pos] = val ;
        //the rest remain the same
        for (int indexOld = pos; indexOld < org.length; indexOld++) {
            res[indexOld+1] = org[indexOld] ;
        }
        /* the following is wrong: will jump one item
        for (int i = pos+1; i < org.length ; i++) {
            res[i] = org[i];
        }
        * */
        return res ;
    }
    private static void print(int[] arr){
        for (int i = 0; i <arr.length ; i++) {
            System.out.println(arr[i]);
        }
    }