teddy-37% java Test

BTree Tester 
add (+), max, empty (e), height (h)
present (p), size, sum, show
root, left, right

> +
>> 6
(*6*)
> +
>> 3
((*3*)6*)
> +
>> 9
((*3*)6(*9*))
> +
>> 1
(((*1*)3*)6(*9*))
> +
>> 2
(((*1(*2*))3*)6(*9*))
> +
>> 8
(((*1(*2*))3*)6((*8*)9*))
> +
>> 11
(((*1(*2*))3*)6((*8*)9(*11*)))
> height
3
> sum
40
> root
6
> left
3
> left
1
> left
null
> root
6
> right
9
> left
8
> root
6
> right
9
> right
11
> right
null
> right
ERROR: currentNode is null
> root
6
> show
(((*1(*2*))3*)6((*8*)9(*11*)))
> help
add (+), max, empty (e), height (h)
present (p), size, sum, show
root, left, right
> p
>> 2
true
> p
>> 99
false
> max
11
> empty
false
> size
7
> end
teddy-37% java Test

BTree Tester 
add (+), max, empty (e), height (h)
present (p), size, sum, show
root, left, right

> show
*
> size
0
> sum
0
> height
-2147483648
> root
null
> max
-2147483648
> empty
true
> end
teddy-37%