displayLL.java

//Question: Display a Linked List in various way
package LinkedList;

public class displayLL {
    public static class Node {       // Making new class named "Node"
    int val;      // Has part (Data)
    Node next;    // Has part (Next node reference)
    }
    public static void main(String[] args) {

        // Making 4 new "Node Objects" (a, b, c, d)
        Node a = new Node();  
        Node b = new Node();
        Node c = new Node();
        Node d = new Node();

        // Assigning values and linking
        a.val = 10;
        a.next = b;

        b.val = 20;
        b.next = c;

        c.val = 30;
        c.next = d;

        d.val = 40;

        Node temp = a ;  // shallow copy (Same as pointer in c language) : Does not create a new memory location, it is just an another name of the same meory location of a
                         // first element = a = head

//      for (int i = 0; i <= 4 ; i++) {      // Method 1
//          System.out.println(temp.val);
//          temp = temp.next ;
//       }

        while(temp != null) {                // Method 2
            System.out.println(temp.val);
            temp = temp.next ;
        }

    }
}