printtree

private static void printTree(TreeNode current){
                if (current.getLeft() != null){
                        System.out.println(current.getValue() + "'s mother: " + current.getLeft());
                        printTree(current.getLeft());
                }
                if (current.getRight() != null){
                        System.out.println(current.getValue() + "'s father: " + current.getRight());
                        printTree(current.getRight());
                }
        }