编辑代码

public static void measureLevel(Node node) {

        Queue<Node> nodeQueue = new LinkedList<>();
        nodeQueue.add(node);
        int count = 0;
        while (!nodeQueue.isEmpty()) {
            for (int i = 0; i < nodeQueue.size(); i++) {
                Node nodePoll = nodeQueue.poll();
                nodePoll.level = count;
                System.out.println(nodePoll);
                nodeQueue.addAll(nodePoll.children);
            }
            count++;
        }
    }