Mattie

    public void countBladeren()
    {
        if (leftChild != null)
        {
            leftChild.countBladeren();
            System.out.println("LEFT != NULL");
        }
        if (rightChild != null)
        {
            rightChild.countBladeren();
            System.out.println("RIGHT != NULL");
        }

        if (leftChild == null && rightChild == null)
        {
            aantalBladeren++;
            System.out.println("RIGHT en LEFT == NULL");
        }
    }

    public int aantalBlad()
    {
        aantalBladeren = 0;
        countBladeren();
        return aantalBladeren;
    }