用java写一个楼栋单元房屋的树形结构

非常感谢您的提问。以下是一个用 Java 编写的楼栋单元房屋的树形结构示例代码：

class TreeNode {
    private String name;
    private List<TreeNode> children;

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

    public void addChild(TreeNode child) {
        this.children.add(child);
    }

    public String getName() {
        return this.name;
    }

    public List<TreeNode> getChildren() {
        return this.children;
    }
}

public class Building {
    public static void main(String[] args) {
        TreeNode building = new TreeNode("Building");

        TreeNode unit1 = new TreeNode("Unit 1");
        TreeNode unit2 = new TreeNode("Unit 2");
        TreeNode unit3 = new TreeNode("Unit 3");

        TreeNode floor1 = new TreeNode("Floor 1");
        TreeNode floor2 = new TreeNode("Floor 2");
        TreeNode floor3 = new TreeNode("Floor 3");

        TreeNode room1 = new TreeNode("Room 1");
        TreeNode room2 = new TreeNode("Room 2");
        TreeNode room3 = new TreeNode("Room 3");

        room1.addChild(new TreeNode("Bed"));
        room1.addChild(new TreeNode("Desk"));
        room1.addChild(new TreeNode("Chair"));

        room2.addChild(new TreeNode("Bed"));
        room2.addChild(new TreeNode("Desk"));
        room2.addChild(new TreeNode("Chair"));

        room3.addChild(new TreeNode("Bed"));
        room3.addChild(new TreeNode("Desk"));
        room3.addChild(new TreeNode("Chair"));

        floor1.addChild(room1);
        floor1.addChild(room2);
        floor2.addChild(room3);

        unit1.addChild(floor1);
        unit2.addChild(floor2);
        unit3.addChild(new TreeNode("Empty"));

        building.addChild(unit1);
        building.addChild(unit2);
        building.addChild(unit3);

        printTree(building, 0);
    }

    private static void printTree(TreeNode node, int depth) {
        StringBuilder sb = new StringBuilder();
        for (int i = 0; i < depth; i++) {
            sb.append("-");
        }
        sb.append(node.getName());
        System.out.println(sb.toString());

        for (TreeNode child : node.getChildren()) {
            printTree(child, depth + 1);
        }
    }
}

这段代码使用了树形结构来表示楼栋、单元、楼层和房间之间的关系。每个节点都有一个名称和一个子节点列表，可以通过 addChild 方法来添加子节点。在示例中，我们创建了一个 Building 节点作为根节点，然后添加了三个 Unit 节点作为 Building 的子节点，每个 Unit 节点又包含了若干个 Floor 节点，每个 Floor 节点又包含了若干个 Room 节点，最后每个 Room 节点又包含了三个具体的物品节点。最后，我们使用递归的方式遍历整个树形结构，并打印出每个节点的名称和深度，以展示树形结构的形态。