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getSize() //accessor method that returns the size of the array • public double getinventoryValue() //accessor method to return the combined sum of the totalValue of each of the ItemOnShelf objects in the InventoryOnShelf object. public String toString() //accessor method to return each ItemOnShelf object in InventoryOnShelf object (one per line), along with the total inventory value on a line below the list of ItemOnShelf objects

getSize() //accessor method that returns the size of the array • public double getinventoryValue() //accessor method to return the combined sum of the totalValue of each of the ItemOnShelf objects in the InventoryOnShelf object. public String toString() //accessor method to return each ItemOnShelf object in InventoryOnShelf object (one per line), along with the total inventory value on a line below the list of ItemOnShelf objects

Database System Concepts
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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This is using Java. 

I am not sure about how to write the code for the last three requirements. 

Here is my code for the first part. Please leave short comments so it helps me to understand better. 

public class InventoryOnShelf {

//fields

// object type array

private ItemOnShelf [] itemOnShelfList;

private int size;

public InventoryOnShelf() {

itemOnShelfList = new ItemOnShelf[ 5 ] ;

size= 0;

 

}

public void addItems(ItemOnShelf newItem) {

}

}

getSize() //accessor method that returns the size of the array • public double getinventoryValue() //accessor method to return the combined sum of the totalValue of each of the ItemOnShelf objects in the InventoryOnShelf object. public String toString() //accessor method to return each ItemOnShelf object in InventoryOnShelf object (one per line), along with the total inventory value on a line below the list of ItemOnShelf objects
Transcribed Image Text:getSize() //accessor method that returns the size of the array • public double getinventoryValue() //accessor method to return the combined sum of the totalValue of each of the ItemOnShelf objects in the InventoryOnShelf object. public String toString() //accessor method to return each ItemOnShelf object in InventoryOnShelf object (one per line), along with the total inventory value on a line below the list of ItemOnShelf objects
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