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public class LinkedList<E> {
    private Node<E> head = null;
 
    private class Node<E> {
        E value;
        Node<E> next;
 
        // Node constructor links the node as a new head
        Node(E value) {
            this.value = value;
            this.next = head;
            head = this;
        }
    }
 
    public void add(E e) {
        new Node<E>(e);
        // Link node as new head
    }
 
    public void dump() {
        for (Node<E> n = head; n != null; n = n.next)
            System.out.print(n.value + " ");
    }
 
    public static void main(String[] args) {
        LinkedList<String> list = new LinkedList<>();
        list.add("world");
        list.add("Hello");
        list.dump();
    }
}

Main.java:1: error: class LinkedList is public, should be declared in a file named LinkedList.java
public class LinkedList<E> {
       ^
Main.java:11: error: incompatible types
            this.next = head;
                        ^
  required: LinkedList<E#1>.Node<E#2>
  found:    LinkedList<E#1>.Node<E#1>
  where E#1,E#2 are type-variables:
    E#1 extends Object declared in class LinkedList
    E#2 extends Object declared in class LinkedList.Node
Main.java:12: error: incompatible types
            head = this;
                   ^
  required: LinkedList<E#2>.Node<E#2>
  found:    LinkedList<E#2>.Node<E#1>
  where E#1,E#2 are type-variables:
    E#1 extends Object declared in class LinkedList.Node
    E#2 extends Object declared in class LinkedList
3 errors

Standard output is empty