如何使用相同的map对象创建树对象(Java)

import java.util.HashMap;
import java.util.Map;

class TreeNode {
    private String name;
    private Map<String, TreeNode> children;

    public TreeNode(String name) {
        this.name = name;
        this.children = new HashMap<>();
    }

    public void addChild(String name, TreeNode child) {
        children.put(name, child);
    }

    public TreeNode getChild(String name) {
        return children.get(name);
    }
}

public class Main {
    public static void main(String[] args) {
        Map<String, TreeNode> map = new HashMap<>();
        map.put("A", new TreeNode("A"));
        map.put("B", new TreeNode("B"));
        map.put("C", new TreeNode("C"));

        TreeNode root = new TreeNode("Root");
        root.addChild("A", map.get("A"));
        root.addChild("B", map.get("B"));
        root.addChild("C", map.get("C"));

        System.out.println(root.getChild("A").getName()); // Output: A
        System.out.println(root.getChild("B").getName()); // Output: B
        System.out.println(root.getChild("C").getName()); // Output: C
    }
}