好的，完整的main函数如下所示：
public static void main(String[] args) {
String[] prelist = {"A", "B", "D", null, "G", null, null,
null,"C", "E", null,null,"F","H"};
BinaryTree1<String> binaryTree = new BinaryTree1<>(prelist);
// 创建二叉树成功
BinaryNode<String> nodeB = binaryTree.root.left;
BinaryNode<String> nodeC = binaryTree.root.right;
// 寻找节点 B 和节点 C 的最近公共祖先
BinaryNode<String> ancestor = binaryTree.ancestor(binaryTree.root, nodeB, nodeC);
if (ancestor != null) {
System.out.println("The lowest common ancestor of nodes B and C is: " + ancestor.data);
} else {
System.out.println("There is no common ancestor for nodes B and C.");
}
}
这段代码创建了一个字符串类型的二叉树，并找到了节点 B 和节点 C 的最近公共祖先。您可以根据需要进行调整和测试。
内容由零声教学AI助手提供，问题来源于学员提问
