Adding a Object to End of a Linked List in One Class

Question

I am a bit new to LinkedList and I want to practice by making methods in ExampleLinkedList class. There is a list in test3. When I call test3 I get Goodbye Thanks Hello. What I want is to add "AddedItem" in the end of the list to get AddedItem Goodbye Thanks Hello but I get only AddedItem as a result. How can I fix my addToEnd method without writing a new class.

public class ExampleLinkedList 
{
    private String data;
    private ExampleLinkedList next;

    public ExampleLinkedList(String data,ExampleLinkedList next)
    {
        this.data = data;
        this.next = next;
    }

    public void addToEnd(String item)
    {
        while(next != null)
        {
            data = item;
            next.data = data;
            next = next.next;   
        }
    }

    public boolean isEmpty()
    {
        if(next == null)
        {
            return true;
        }
        return false;
    }

    public String toString()
    {
        String result = data;
        while(next != null)
        {
            result = result + " " + next.data;
            next = next.next;
        }
        return result;
    }

}

public class Test 
{     

    public static void main(String[] args) 
    {
        ExampleLinkedList test1 = new ExampleLinkedList("Hello", null);
        ExampleLinkedList test2 = new ExampleLinkedList("Thanks", test1);
        ExampleLinkedList test3 = new ExampleLinkedList("Goodbye", test2);

        test3.addToEnd("AddedItem");
        System.out.println(test3);
    }
}

Answer 1

This should work. It will set item as the head of the linked list

public void addToEnd(String item)
{
    ExampleLinkedList newNode = new ExampleLinkedList(data, next);
    data = item;
    next = newNode;
}

Answer 2

How about following as it is a new node...

public ExampleLinkedList addToEnd(String item)
{
   return new ExampleLinkedList(item,this);
}

so full code could be...

public class ExampleLinkedList
{
    private String data;
    private ExampleLinkedList next;

    public ExampleLinkedList(String data, ExampleLinkedList next)
    {
        this.data = data;
        this.next = next;
    }

    public ExampleLinkedList addToEnd(String item)
    {
       return new ExampleLinkedList(item,this);
    }

    public boolean isEmpty()
    {
        if(next == null)
        {
            return true;
        }
        return false;
    }

    public String toString()
    {
        String result = data;
        while(next != null)
        {
            result = result + " " + next.data;
            next = next.next;
        }
        return result;
    }


    public static void main(String[] args)
    {
        ExampleLinkedList test1 = new ExampleLinkedList("Hello", null);
        ExampleLinkedList test2 = new ExampleLinkedList("Thanks", test1);
        ExampleLinkedList test3 = new ExampleLinkedList("Goodbye", test2);

        ExampleLinkedList myItem = test3.addToEnd("AddedItem");
        System.out.println(myItem);
    }
}

output:

AddedItem Goodbye Thanks Hello