CircularLinkedlist_Ralph

package com.its101.prwk05_06;

public class CircularLinkedList {
    // Node of the circular linked List
    public static class Node {
        String data;
        Node next;

        public Node(String data) {
            this.data = data;
        }
    }
    // declare head node and last node
    public Node head = null;
    public Node last = null;

    // createNode() add new node at the end of the linked list
    public void createNode(String data) {
        // create new node
        Node newNode = new Node(data);
        // check if the linked list is empty
        if (head == null) {
            // if linked list is empty, head node and last node will point to new node
            head = newNode;
            last = newNode;
            newNode.next = head;
        } else {
            // last node will point to new node
            last.next = newNode;
            // new node will become new last node
            last = newNode;
            // last node will point to head node to become circular linked list
            last.next = head;
        }
    }

    // printNode() prints the nodes in the linked list
    public void printNode() {
        Node current = head;
        if (head == null) {
            System.out.println("Circular Linked List is empty!");
        } else {
            System.out.println("Nodes of the circular Linked List: ");
            do {
                // print each node by incrementing to current node pointer
                System.out.print(" " + current.data);
                current = current.next;
            } while (current != head);
            System.out.println();
        }
        System.out.println();
    }

    public static void main(String[] args) {
        CircularLinkedList studentsList = new CircularLinkedList();

        //Create new node to the linked list and assign a data value
        studentsList.createNode("Ralph");
        studentsList.createNode("Espe");
        studentsList.createNode("Glen");
        studentsList.createNode("Nomer");

        //Print the nodes-value of the Linked List
        studentsList.printNode();
    }
}