Please help me understanding Linked Lists

Question

Hey,
i am trying to understand how to implement a linked lists myself and found this code online:
public class ListL {
static class ElementL {
private Object element; // Content of the element
private ElementL next; //reference to next El.
public ElementL (Object o){
element = o;
next = null;
}
}
private ElementL head;
public ListL (Object o){
head = new Element (o);
}
What follows in the code are methods.
Now my QUESTION is Why do we declare another static class ElementL within ListL?

Answer 1

The ElementL class is inside the ListL class, because it shouldn't be accessed from outside. Only the ListL class needs to access the ElementL class.

Answer 2

Yes, you could also have the class outside the ListL class. But you still need a class to hold the nodes of the linked list. After all, a linked list has to keep track of the next node, so you need a way to store that information.

Answer 3

@Splitty Dev thank you for your answer. Could i create a linked list without an inner class?