singlyList.java

public class singlyList 
{       
    class Node
    {    
        int data;    
        Node next;    
        public Node(int data) 
        {    
            this.data = data;    
            this.next = null;    
        }    
    }       
    public Node head = null;    
    public Node tail = null;    
    public void addNode(int data) 
    {    
        Node newNode = new Node(data);    
        if(head == null) 
        {     
            head = newNode;    
            tail = newNode;    
        }    
        else 
        {        
            tail.next = newNode;     
            tail = newNode;    
        }    
    }    
           
    public void display() 
    {       
        Node current = head;  
        if(head == null) 
        {    
            System.out.println("List is empty");    
            return;    
        }    
        System.out.println("Nodes of singly linked list: ");    
        while(current != null) 
        {      
            System.out.print(current.data + " ");    
            current = current.next;    
        }    
        System.out.println();    
    }    
        
    public static void main(String[] args) 
    {    
        singlyList sList = new singlyList();    
              
        sList.addNode(1);    
        sList.addNode(2);    
        sList.addNode(3);    
        sList.addNode(4);    
        sList.display();    
    }    
}