class Node
{
    int data;
    Node next;

    //initialize a node 
    public Node(int data)
    {
        this.data = data;
        this.next = null;
    }
}

class LinkedDemo 
{

    //first or head node of the list
    Node head;

    public void insert(int data)
    {
        Node newNode = new Node(data);
        
        // If the list is empty, create the head
        if (head == null) 
	    {
            head = newNode;
        }
	    else
	    {
            Node current = head;
        
	    //find end of the list
            while (current.next != null) 
	        {
                current = current.next;
            }
            //insert the new node at the end
            current.next = newNode;
        }
    }

    //Method to display the linked list
    public void display()
    {
        if (head == null) 
	    {
            System.out.println("The list is empty.");
            return;
        }
        
        Node current = head;
        while (current != null)
	    {
            System.out.print(current.data + " -> ");
            current = current.next;
        }

    }

    public static void main(String[] args)
    {
        LinkedDemo list = new LinkedDemo();

        // Insert nodes into the list
        list.insert(10);
        list.insert(20);
        list.insert(30);
        list.insert(40);
        
        // Display the list
        System.out.println("Linked List:");
        list.display();
        
     
    }
}