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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import java.util.Scanner;

public class Inventory {
   public static void main (String[] args) {
      Scanner scnr = new Scanner(System.in);
       
      InventoryNode headNode;                                              
      InventoryNode currNode;
      InventoryNode lastNode;

      String item;
      int numberOfItems;
      int i;

      // Front of nodes list                                                                         
      headNode = new InventoryNode();
      lastNode = headNode;

      int input = scnr.nextInt();

      for(i = 0; i < input; i++ ) {
         item = scnr.next();
         numberOfItems = scnr.nextInt();
         currNode = new InventoryNode(item, numberOfItems);
         currNode.insertAtFront(headNode, currNode);
         lastNode = currNode;
      }

      // Print linked list                                                                   
      currNode = headNode.getNext();
      while (currNode != null) {
         currNode.printNodeData();
         currNode = currNode.getNext();
      }
   }
}

Given main() in the Inventory class, define an insertAtFront() method in the InventoryNode class that inserts items at the front of a
linked list (after the dummy head node).
Ex. If the input is:
4
plates 100
spoons 200
cups 150
forks 200
the output is:
200 forks
150 cups
200 spoons
100 plates
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Transcribed Image Text:Given main() in the Inventory class, define an insertAtFront() method in the InventoryNode class that inserts items at the front of a linked list (after the dummy head node). Ex. If the input is: 4 plates 100 spoons 200 cups 150 forks 200 the output is: 200 forks 150 cups 200 spoons 100 plates
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