this is package circularlinkedlist; import java.util.Iterator; public class CircularLinkedList<E> implements Iterable<E> { // Your variables Node<E> h

this is

package circularlinkedlist;

import java.util.Iterator;

public class CircularLinkedList implements Iterable {

// Your variables

Node head;

Node tail;


// implement this constructor

public CircularLinkedList() {


// I highly recommend using this helper method

// Return Node found at the specified index

// be sure to handle out of bounds cases

private Node getNode(int index ) {

 return null;


// attach a node to the end of the list

public boolean add(E item) {


 return false;


// Cases to handle

// out of bounds

// adding to empty list

// adding to front

// adding to “end”

// adding anywhere else


public void add(int index, E item){


// remove must handle the following cases

// out of bounds

// removing the only thing in the list

// removing the first thing in the list (need to adjust the last thing in the list to point to the beginning)

// removing the last thing

// removing any other node


public E remove(int index) {

 return null;


// Turns your list into a string

// Useful for debugging

public String toString(){

 Node current =  head;

 StringBuilder result = new StringBuilder();

 if(size == 0){

  return “”;


 if(size == 1) {

  return head.item.toString();





   result.append(” ==> “);

   current =;

  } while(current != head);


 return result.toString();


public Iterator iterator() {

 return new ListIterator();


// provided code for different assignment

// you should not have to change this

// change at your own risk!

// this class is not static because it needs the class it’s inside of to survive!

private class ListIterator implements Iterator{

 Node nextItem;

 Node prev;

 int index;


 //Creates a new iterator that starts at the head of the list

 public ListIterator(){

  nextItem = (Node) head;

  index = 0;


 // returns true if there is a next node

 // this is always should return true if the list has something in it

 public boolean hasNext() {

  // TODO Auto-generated method stub

  return size != 0;


 // advances the iterator to the next item

 // handles wrapping around back to the head automatically for you

 public E next() {

  // TODO Auto-generated method stub

  prev =  nextItem;

  nextItem =;

  index =  (index + 1) % size;

  return prev.item;


 // removed the last node was visted by the .next() call

 // for example if we had just created a iterator

 // the following calls would remove the item at index 1 (the second person in the ring)

 // next() next() remove()

 public void remove() {

  int target;

  if(nextItem == head) {

   target = size – 1;

  } else{

   target = index – 1;



  CircularLinkedList.this.remove(target); //calls the above class



// It’s easiest if you keep it a singly linked list


private static class Node{

 E item;

 Node next;

 public Node(E item) {

  this.item = item;



public static void main(String[] args){



this is

public class SolitaireEncryption {

   public static char encryptChar(char letter, int key) {

       int value =   letter – ‘a’;

       int encryptedValue =  (value + key) % 26;

       char encryptedChar = (char) (encryptedValue+’a’);

       return encryptedChar;


   public static char decryptChar(char letter, int key) {

       int value =   letter – ‘a’;

       int decryptedValue =  (value + (26-key)) % 26;

       char decryptedChar = (char) (decryptedValue+’a’);

       return decryptedChar;


   public int getKey(CircularLinkedList deck){ // calls the steps methods

       return -1;


   private static void step1(CircularLinkedList deck){


   private static void step2(CircularLinkedList deck){


   private static void step3(CircularLinkedList deck){


   private static void step4(CircularLinkedList deck){


   private static int step5(CircularLinkedList deck){

       return -1;


   public static void main(String[] args) {

       CircularLinkedList deck = new CircularLinkedList<>();



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