Notes

class LinkedList {

class Node {
int data;
Node next;

public Node(int data) {
this.data = data;
this.next = null;
}
}

//head AND tail
public Node head = null;
public Node tail = null;

public void Insert(int val) {

Node newNode = new Node(val);

if(head==null) {
head = newNode;
tail = newNode;
tail.next = null;
}
else {
tail.next = newNode;
tail = newNode;
tail.next = null;
}
}

public void Display() {
Node curr = head;
while(curr!=null) {
System.out.print(curr.data + " ");
curr = curr.next;
}
}
}

public class MyClass {
public static void main(String args[]) {

LinkedList list = new LinkedList();
list.Insert(10);
list.Insert(11);
list.Insert(22);
list.Insert(33);

list.Display();

}
}