private int height(BSTNode<T> t) {
			if(t == null){
				return 0;
			}else{
				if ((t.left == null)&&(t.right == null)){
					return 1;
				}else{
					return 1 +(Math.max(height(t.left),height(t.right)));
				}
			}


	}

	public int height() {
		return height(this.root);
	}