Task 3 question: Write code in Java with all these classes implementation and a program called Polymorphism_works with member method specific_Item which takes one instance of Item_in_Stock class as a parameter. Perform functionality of adding items, selling items and changing item price and displaying items details against specific item instance. There should be a main () method which declares an array of objects containing instance of sub classes of Item_in_Stock class and then calls methods of each of the implemented classes. More info: In this last and final part of the course work you are required to change the definition of the Item_in_Stock class to make it an abstract class and change the getItemCat(), getItemName() and getItemDescription() definitions to make them abstract methods.You are then required to design and implement three classes which are derived from Item_in_Stock class to fully demonstrate the concept of inheritance and polymorphism. Implementation of HP_Laptop class in part II should have given you an idea of inheritance and polymorphism.Three sub classes, one class against each category (Computers, Laptops and Accessories), should contain appropriate constructors, instance variables, setter and getters methods and overridden methods for getItemName(), getItemDescription() and get_Item_details() method.You should be creative and come up with your own ideas of sub-classes. (please see the photos if you need) Complete Code://create a classclass Item_in_Stock{//Declare variable to store code of the itemString Item_code;//Declare variable to store item descriptionString Item_desc;//Declare variable to store stock of quantityint qty_stock;//Declare variable to store price of quantitydouble item_price;//Create a constructorItem_in_Stock(String itemcode, int qtystock, int itemprice){//initialize the itemcodethis.Item_code = itemcode;//initialize the quantitythis.qty_stock = qtystock;//initialize the pricethis.item_price = itemprice;}//Declare get method for Item_codeString getItem_code(){//return item_codereturn (this.Item_code);}//Declare set method for Item_codevoid setItem_code(String itemcode){//set the itemcodethis.Item_code = itemcode;}//Declare get method for Item_descString getItem_desc(){//return Item_descreturn (this.Item_desc);}//Declare set method for ITem_descvoid setItem_desc(String itemdesc){//Initialize Item_codethis.Item_code = itemdesc;}//Declare get method for qty_stockint getqty_stock(int stock){//return the quantity stockreturn (this.qty_stock);}//Declare qty_stock methodvoid setqty_stock(String itemdesc){//initialize the variable qty_stockthis.qty_stock = qty_stock;}//Declare getitempricedouble getitem_price(){//return the item_pricereturn(this.item_price);}//Declare method to set item_pricevoid setitem_price(int price){//initilailze item_pricethis.item_price=price;}//Declare method getItemcatString getItemCat(){//return the messagereturn(" Unknown Item Category");}//Declare method getItem NameString getItemName(){//return the messagereturn(" Unknown Item Name");}//Declare the method get| Tem DescriptionString getItem Description(){//return the messagereturn(" Unknown Item Description");}//Declare the method add_itemvoid add_item(int item){//check if the stock exceedsif (this.qty_stock + item 25)//Display the messageSystem.out.println("The error:Item stock must not exceed 25 items"else{}}//if the stock does not exceed revise the stockthis.qty_stock = this.qty_stock+ item;//Declare the method item_sellvoid item_sell(int item){//check if the stock is availableif (this.qty_stock

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Task 3 question: Write code in Java with all these classes implementation and a program called Polymorphism_works with member method specific_Item which takes one instance of Item_in_Stock class as a parameter. Perform functionality of adding items, selling items and changing item price and displaying items details against specific item instance. There should be a main () method which declares an array of objects containing instance of sub classes of Item_in_Stock class and then calls methods of each of the implemented classes. More info: In this last and final part of the course work you are required to change the definition of the Item_in_Stock class to make it an abstract class and change the getItemCat(), getItemName() and getItemDescription() definitions to make them abstract methods.You are then required to design and implement three classes which are derived from Item_in_Stock class to fully demonstrate the concept of inheritance and polymorphism. Implementation of HP_Laptop class in part II should have given you an idea of inheritance and polymorphism.Three sub classes, one class against each category (Computers, Laptops and Accessories), should contain appropriate constructors, instance variables, setter and getters methods and overridden methods for getItemName(), getItemDescription() and get_Item_details() method.You should be creative and come up with your own ideas of sub-classes. (please see the photos if you need) Complete Code://create a classclass Item_in_Stock{//Declare variable to store code of the itemString Item_code;//Declare variable to store item descriptionString Item_desc;//Declare variable to store stock of quantityint qty_stock;//Declare variable to store price of quantitydouble item_price;//Create a constructorItem_in_Stock(String itemcode, int qtystock, int itemprice){//initialize the itemcodethis.Item_code = itemcode;//initialize the quantitythis.qty_stock = qtystock;//initialize the pricethis.item_price = itemprice;}//Declare get method for Item_codeString getItem_code(){//return item_codereturn (this.Item_code);}//Declare set method for Item_codevoid setItem_code(String itemcode){//set the itemcodethis.Item_code = itemcode;}//Declare get method for Item_descString getItem_desc(){//return Item_descreturn (this.Item_desc);}//Declare set method for ITem_descvoid setItem_desc(String itemdesc){//Initialize Item_codethis.Item_code = itemdesc;}//Declare get method for qty_stockint getqty_stock(int stock){//return the quantity stockreturn (this.qty_stock);}//Declare qty_stock methodvoid setqty_stock(String itemdesc){//initialize the variable qty_stockthis.qty_stock = qty_stock;}//Declare getitempricedouble getitem_price(){//return the item_pricereturn(this.item_price);}//Declare method to set item_pricevoid setitem_price(int price){//initilailze item_pricethis.item_price=price;}//Declare method getItemcatString getItemCat(){//return the messagereturn(&#34; Unknown Item Category&#34;);}//Declare method getItem NameString getItemName(){//return the messagereturn(&#34; Unknown Item Name&#34;);}//Declare the method get| Tem DescriptionString getItem Description(){//return the messagereturn(&#34; Unknown Item Description&#34;);}//Declare the method add_itemvoid add_item(int item){//check if the stock exceedsif (this.qty_stock + item >25)//Display the messageSystem.out.println(&#34;The error:Item stock must not exceed 25 items&#34;else{}}//if the stock does not exceed revise the stockthis.qty_stock = this.qty_stock+ item;//Declare the method item_sellvoid item_sell(int item){//check if the stock is availableif (this.qty_stock <=0)//Display the messageSystem.out.println(&#34;No stock is available&#34;);else{}//Update the stockthis.qty_stock = this.qty_stock-item;}//Declare the method tax_on_item to find the tax on an itemvoid tax_on_Item(){//Declare a variable tax to store the taxdouble tax = this.qtv stock * 0.05://Display the messageSystem.out.println(&#34;The tax is &#34; + tax);}//Declare method to set price of item without taxvoid setitempricenotax(int price){//Initialize the price without taxthis.item_price=price;}//Declare method to getitemdouble getitempricenotax(){//return the item_pricereturn (this.item_price);}//Declare method getitemprice with taxdouble getitempricetax(){//update the price with the taxdouble price = this.item_price + this.item_price* 0.05;//return the taxreturn(price);}//Declare the method get_Item_Detailsvoid get_Item_Details(){//Display the messageSystem.out.println(&#34;Laptops item stock information:&#34;);System.out.println(&#34;Item Category:&#34;+ this.getItemCat());System.out.println(&#34;Item Name:&#34; + this.getItemName());System.out.println(&#34;Description:&#34; + this.getItem Description());System.out.println(&#34;Stockcode&#34; + this.Item_code);}};//Declare the classclass stock{public static void main(String args[]){//Declare objectItem_in_Stock 01 = new Item_in_Stock(&#34;C15&#34;,5,180);//Display the details01.get_Item_Details();//add 3 items to the stock01.add_item(3);Price Without tax: R.0 180.0Price with tax: R.0189.0Total quantity in store : 8Laptops item stock information:Item Category: Unknown Item CategoryItem Name: Unknown Item Name 2System.out.println(&#34;Price with tax : R.O&#34; + this.getitempricetax()); Description: Unknown Item DescriptionSystem.out.println(&#34;Price Without tax : R.O &#34; + this.item_price);System.out.println(&#34;Total quantity in store &#34; + this.qty_stock);Stockcode : C15Price Without tax: R.0 180.0Price with tax: R.0189.0Total quantity in store : 6Laptops item stock information:Item Category: Unknown Item CategoryItem Name: Unknown Item Name2//display the details01.get_Item_Details();//add 2 items to the stock01.item_sell(2);Part one answers: code,output,and diagram//Display the details01.get_Item_Details();//Update the price of items to 20001.setitem_price(200);01.get_Item_Details();//add the stock01.add_item(25);Output:Laptops item stock information:Item Category: Unknown Item CategoryItem Name: Unknown Item Name2Description: Unknown Item DescriptionStockcode : C15Price Without tax: R.0 180.0Price with tax: R.0189.0Total quantity in store : 5Laptops item stock information:Item Category: Unknown Item CategoryItem Name: Unknown Item Name2Description: Unknown Item DescriptionStockcode: C15Description: Unknown Item DescriptionStockcode: C15Price Without tax: R.0 200.0Price with tax: R.0210.0Total quantity in store : 6The error:Item stock must not exceed 25 itemPress any key to continue.Item-im-Stock- item_code: Stringitem-name: Stringitem-Description : string-quantity-in-stock: 'mt- item - price : double-+ item_m_Stock (String, int, double)+ getItem Code (); String+ getItem Name(); string+ getItem Description (); String+ get Quantity In Stock(): int+ getItem Cat (): string+ add-Item ()+ item_sell()+ tax_om__item(): double+ setItem price ()+ get itemprice Without Tax():double+getItemprice with Tax():couble+getItem-Details () Part two answers code, and diagramHPLaptop.javapublic class HPLaptop extends ItemInStock {String brand;String type;// to use this constructor you have to create a constructor in ItemInStock also// by passing ItemInStock obj in parameterHPLaptop (HPLaptop obj, String type) {super(obj);this.brand = &#34;HP&#34;;this.type = type;}@Overridepublic String getItemCategory() {return &#34;LAPTOP&#34;;}}@Overridepublic String getItemName() {return &#34;HP_Laptop&#34;;@Overridepublic String getItem Description() {return &#34; HP_15_11G_8GB_ITB&#34;&#34;;}// to create item details class I need the code you prepared for part 1.}itemStock-itemCode: String-itemName: String-item Description-itemQty:int-itemCategory: String+getItemQty(): int+setItemName():voidHPLaptop-brand:string-type:string+setBrand()+getType()

Accepted Answer

##To create an abstract class in Java, you can use the abstract keyword before the class name. An…