public void add(int parentkey,boolean isLeft,int key,Object value){
        if(root == null){
            root = new TreeNode(key, value, null);
            System.out.println("Корень " + root.key + "/" + root.value);
        }else{
            TreeNode current;
            current = root;
            while (true)
            {
                if (parentkey == current.key){
                    if (isLeft == true){
                        current.left = new TreeNode(key, value, current);
                        System.out.println("Корень " + current.key + ". Левый элемент " +            current.left.key);
                    } else {
                        current.right = new TreeNode(key, value, current);
                        System.out.println("Корень " + current.key + ". Правый элемент " + current.right.key);
                    }
                    break;
                } else {
                    current = current.left;
                    if ((parentkey != current.key)&&(current.left == null)){
                        current = root;
                        current = current.right;
                    }
                }
            }
        }

    }