java用三叉链表构造二叉树

在Java中，可以使用三叉链表来构造二叉树。下面是一个示例代码，演示了如何使用三叉链表实现二叉树的基本操作。

// 定义二叉树节点类
class BTNode {
    int data;
    BTNode left;
    BTNode right;
    BTNode parent;

    public BTNode(int data) {
        this.data = data;
        this.left = null;
        this.right = null;
        this.parent = null;
    }
}

// 构造二叉树的类
class BinaryTree {
    BTNode root;

    public BinaryTree() {
        this.root = null;
    }

    // 插入节点
    public void insert(int data) {
        BTNode newNode = new BTNode(data);
        if (root == null) {
            root = newNode;
        } else {
            BTNode current = root;
            BTNode parent;
            while (true) {
                parent = current;
                if (data < current.data) {
                    current = current.left;
                    if (current == null) {
                        parent.left = newNode;
                        newNode.parent = parent;
                        return;
                    }
                } else {
                    current = current.right;
                    if (current == null) {
                        parent.right = newNode;
                        newNode.parent = parent;
                        return;
                    }
                }
            }
        }
    }

    // 其他二叉树操作方法...

    // 复制二叉树
    public void copyTree(BTNode dstTreeRoot, BTNode srcTreeRoot) {
        if (srcTreeRoot == null) {
            dstTreeRoot = null;
        } else {
            dstTreeRoot = new BTNode(srcTreeRoot.data);
            if (srcTreeRoot.left != null) {
                copyTree(dstTreeRoot.left, srcTreeRoot.left);
                dstTreeRoot.left.parent = dstTreeRoot;
            }
            if (srcTreeRoot.right != null) {
                copyTree(dstTreeRoot.right, srcTreeRoot.right);
                dstTreeRoot.right.parent = dstTreeRoot;
            }
        }
    }
}

// 示例代码
public class Main {
    public static void main(String[] args) {
        BinaryTree tree = new BinaryTree();
        tree.insert(5);
        tree.insert(3);
        tree.insert(7);
        tree.insert(2);
        tree.insert(4);
        tree.insert(6);
        tree.insert(8);

        // 复制二叉树
        BinaryTree copiedTree = new BinaryTree();
        copiedTree.copyTree(copiedTree.root, tree.root);

        // 其他操作...

    }
}