Binary Search Tree Recursive insert not displaying anything

Question

I\'m doing a small Java work on Binary Search Tree but when I\'m implementing the recursive insert of a node into the tree and display it, I don\'t get anything. I\'ve been on i

Answer 1

This sets the BST root and allow the class to work properly, change

    if ( root == null ) {
        root = new BSTNode( elem );
    }

to

    if ( root == null ) {
        root = new BSTNode( elem );
        if ( root.element != null ) {
            this.root = root;
        }
    }