如何深度复制二叉树? [英] How to deep copy a Binary Tree?
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问题描述
我想使用自己的Node类在Java中实现树结构。但我很困惑如何做一个深拷贝复制树。
I would like using my own Node class to implement tree structure in Java. But I'm confused how to do a deep copy to copy a tree.
我的Node类是这样的:
My Node class would be like this:
public class Node{
private String value;
private Node leftChild;
private Node rightChild;
....
我是递归的新手,所以有任何代码我可以学习?谢谢!
I'm new to recursion, so is there any code I can study? Thank you!
推荐答案
试试
class Node {
private String value;
private Node left;
private Node right;
public Node(String value, Node left, Node right) {
this.value = value;
...
}
Node copy() {
Node left = null;
Node right = null;
if (this.left != null) {
left = this.left.copy();
}
if (this.right != null) {
right = this.right.copy();
}
return new Node(value, left, right);
}
}
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