如何为这个(java)通用单向链表创建一个显示方法？

class Node<T> {
    T data;
    Node<T> next;

    public Node(T data) {
        this.data = data;
        this.next = null;
    }
}

class LinkedList<T> {
    private Node<T> head;

    public LinkedList() {
        this.head = null;
    }

    public void display() {
        if (head == null) {
            System.out.println("链表为空。");
            return;
        }

        Node<T> temp = head;
        while (temp != null) {
            System.out.print(temp.data + " ");
            temp = temp.next;
        }
        System.out.println("\n链表遍历结束。");
    }

    // 其他链表操作方法...
}

public class Main {
    public static void main(String[] args) {
        LinkedList<Integer> list = new LinkedList<>();
        list.display(); // 输出 "链表为空。"

        list.head = new Node<>(1);
        list.head.next = new Node<>(2);
        list.head.next.next = new Node<>(3);
        list.display(); // 输出 "1 2 3 \n链表遍历结束。"
    }
}