Question

to be done in java

Your task is to finish the StockItem class so that it meets the following criteria

• The StockItem class will have 4 attributes:

a stock number;

a name;

the price of the item;

the total number of items currently in stock

• The first three of the above characteristics will need to be set at the time a StockItem object is created, with the total number of items set to 0 at this time. The stock number and name will not need to be changed after an item is created.

• The following methods are also required:

o A method that allows the price to be re-set during the object's lifetime

o a method that takes an integer argument and adds this to the total number of items in stock

o a method that returns the total value of items of this stock type;

calculated by multiplying the price of the item by the number of items in stock (price * units)

Required Methods: StockItem(String, String, double) (class constructor) setPrice(double) increaseTotalStock(int) getStockNumber(): String getName(): String getTotalStock(): int getPrice(): double calculateTotalPrice(): double

Requested files StockItem.java

/** * A class representing an item in stock in some sort * of inventory system */

public class StockItem {

//TODO: add fields for a: name, stockNumber, price, units.

//TODO: create a constructor that takes name, stockNumber and price as arguments

// and sets units to 0.

//TODO: create accessor ("getter") methods for price, stock number and name.

//TODO: create a method increaseTotalStock that increases units by a given quantity.

//TODO:create a mutator ("setter") method setPrice that sets price to a given amount.

//TODO: create a method calculateTotalPrice that returns the total price of the current inventory

// (Calculated as current price * number of units) }

Answer 1

Code is Given Below:

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public class StockItem {
   private String stockNumber;
   private String name;
   private double price;//the price of the item;
   private int totalNumber;//the total number of items currently in stock
   //constructor that takes name, stockNumber and price as arguments
   public StockItem(String stockNumber, String name, double price) {
       this.stockNumber = stockNumber;
       this.name = name;
       this.price = price;
       this.totalNumber=0;
   }
  
   public void setPrice(double price) {
       this.price=price;
      
   }
   // method increaseTotalStock that increases units by a given quantity.
   public void increaseTotalStock(int n) {
       totalNumber=totalNumber+n;
   }
   //accessor ("getter") methods for price, stock number and name.
   public String getStockNumber() {
       return stockNumber;
   }
   public String getName() {
       return name;
   }
   public int getTotalStock() {
       return totalNumber;
   }
   public double getPrice() {
       return price;
   }
   //method calculateTotalPrice that returns the total price of the current inventory
   public double calculateTotalPrice() {
       return price*totalNumber;
   }
  
}

Code Snapshot:

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