super.mergeSort((Comparable[])a[index], 0, ((Comparable[])a[index]).length);
super.mergeSort((Object[])a[index], 0, ((Object[])a[index]).length - 1);
    public void mergeSort(int index) {        super.mergeSort((Comparable[])a[index], 0, ((Comparable[])a[index]).length);    }