Database System Concepts
Database System Concepts
7th Edition
ISBN: 9780078022159
Author: Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher: McGraw-Hill Education
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Given main() in the ShoppingList class, define an insertAtEnd() method in the ItemNode class that adds an element to the end of a linked list. DO NOT print the dummy head node.

Ex. if the input is:

4 Kale Lettuce Carrots Peanuts

where 4 is the number of items to be inserted; Kale, Lettuce, Carrots, Peanuts are the names of the items to be added at the end of the list.

The output is:

Kale Lettuce Carrots Peanuts 

public class ItemNode {
   private String item;
   private ItemNode nextNodeRef; // Reference to the next node                                        

   public ItemNode() {
      item = "";
      nextNodeRef = null;
   }

   // Constructor                                                                                     
   public ItemNode(String itemInit) {
      this.item = itemInit;
      this.nextNodeRef = null;
   }

   // Constructor                                                                                     
   public ItemNode(String itemInit, ItemNode nextLoc) {
      this.item = itemInit;
      this.nextNodeRef = nextLoc;
   }

   // Insert node after this node.                                                                   
   public void insertAfter(ItemNode nodeLoc) {
      ItemNode tmpNext;

      tmpNext = this.nextNodeRef;
      this.nextNodeRef = nodeLoc;
      nodeLoc.nextNodeRef = tmpNext;
   }

   // TODO: Define insertAtEnd() method that inserts a node
   //       to the end of the linked list  


   // Get location pointed by nextNodeRef                                                             
   public ItemNode getNext() {
      return this.nextNodeRef;
   }
   
   public void printNodeData() {
      System.out.println(this.item);
   }
}

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}
for (i = 0; i <input;i++){
item= scnr.next();
currNode = new ItemNode (item);
lastNode.insertAt End (headNode, currNode);
lastNode currNode;
}
// Print Linked List
currNode
while (currNode != null) {
currNode.printNodeData();
}
headNode.getNext();
currNode= currNode.getNext ();
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Transcribed Image Text:19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 } } for (i = 0; i <input;i++){ item= scnr.next(); currNode = new ItemNode (item); lastNode.insertAt End (headNode, currNode); lastNode currNode; } // Print Linked List currNode while (currNode != null) { currNode.printNodeData(); } headNode.getNext(); currNode= currNode.getNext ();
File is marked as read only
1 import java.util.Scanner;
3 public class ShoppingList {
IN35∞ H
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public static void main (String[] args) {
Scanner scnr = new Scanner (System.in);
ItemNode headNode; // Create intNode objects
ItemNode currNode;
ItemNode lastNode;
String item;
int i;
Current file: ShoppingList.java ❤
// Front of nodes List
headNode = new ItemNode();
lastNode headNode;
int input = scnr.nextInt():
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Transcribed Image Text:File is marked as read only 1 import java.util.Scanner; 3 public class ShoppingList { IN35∞ H 2 4 6 7 8 9 10 | 11 12 13 14 15 16 17 18 public static void main (String[] args) { Scanner scnr = new Scanner (System.in); ItemNode headNode; // Create intNode objects ItemNode currNode; ItemNode lastNode; String item; int i; Current file: ShoppingList.java ❤ // Front of nodes List headNode = new ItemNode(); lastNode headNode; int input = scnr.nextInt():
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