public void insert(Integer x) {
        if (setSize<arr.length){
            boolean inserted = false;
            for (int i = setSize-1; i>=0 & !inserted;i--){
                if (x>arr[i]){
                    arr[i+1]=x;
                    inserted = true;
                }
                else {
                    arr[i+1]=arr[i];
                }
            }
            setSize = setSize+1;
        }
    }