In this part of the course work, you are required to design and implement a class called HP_Laptop with instance variables specific to this type of items, a constructor with parameters which initialises class data members and invokes the Item_in_Stock constructor when it is invoked using inheritance concept in java and initialises data members of Item_in_stock class as well. This class should be designed and implemented in a way that it overrides getItemCategory() that returns the category of the item, getItemName() that returns HP_Laptop and getItemDescription() that returns HP_I5_11G_8GB_1TB . The Class should also override the get_item_details() method to display the complete details of an item.

Task 2.1. Re-draw UML class diagram which was drawn in part 1 of the course work with this new class HP_Laptop. Relationships should also be represented.

Task 2.2. Implement a class called Item_check with a main method to test HP_Laptop class by defining object of the class and invoking methods.

I wrote this code to solve the above question but it give me an error

public class Item_in_Stock {

String item_code;

String item_name;

String item_description;

String item_category;

int item_quantity;

float item_price;

String itemCode;

String itemName;

String itemDescription;

String itemQty;

String itemCat;

// setting tax rate 5%

private final float TAX_RATE = 5;

ItemInStock(Item_In_Stock obj)

{

this.itemCode = obj.itemCode;

this.itemName = obj.itemName;

this.itemQty = obj.itemQty;

this.itemDescription = obj.itemDescription;

this.itemCat = obj.itemCat;

}

public Item_in_Stock(String item_code, int item_quantity, float item_price)

{

super();

this.item_code = item_code;

this.item_quantity = item_quantity;

this.item_price = item_price;

// initializing other variables

this.item_name = "Unknown Item Name";

this.item_description = "Unknown Item Description";

this.item_category = "Unknown Item Category";

}

// Getters and setters

/**

* @return the item_code

*/

public String getItem_code() {

return item_code;

}

/**

* @param item_code the item_code to set

*/

public void setItem_code(String item_code) {

this.item_code = item_code;

}

/**

* @return the item_name

*/

public String getItem_name() {

return item_name;

}

/**

* @param item_name the item_name to set

*/

public void setItem_name(String item_name) {

this.item_name = item_name;

}

/**

* @return the item_description

*/

public String getItem_description() {

return item_description;

}

/**

* @param item_description the item_description to set

*/

public void setItem_description(String item_description) {

this.item_description = item_description;

}

/**

* @return the item_category

*/

public String getItem_category() {

return item_category;

}

/**

* @param item_category the item_category to set

*/

public void setItem_category(String item_category) {

this.item_category = item_category;

}

/**

* @return the item_quantity

*/

public int getItem_quantity() {

return item_quantity;

}

/**

* @param item_quantity the item_quantity to set

*/

public void setItem_quantity(int item_quantity) {

this.item_quantity = item_quantity;

}

/**

* @return the item_price without tax

*/

public float getItem_price_without_tax() {

return item_price;

}

/**

* @return the item price with tax

*/

public float getItem_price_with_tax() {

return item_price + (((float) item_price / 100) * TAX_RATE);

}

/**

* @param item_price the item_price to set without tax

*/

public void setItem_price(float item_price) {

this.item_price = item_price;

}

/**

* This method add items in stock with a check that item stock does not exceed

* 120.

*

* @param newStock

*/

public void add_Item(int newStock) {

if (item_quantity + newStock > 120) {

System.out.println("Item cannot be added as available stock size exceeds 120!");

} else {

item_quantity += newStock;

}

}

/**

* This method sell items, it reduces the stock accordingly

*

* @param quantityToSell

*/

public void item_Sell(int quantityToSell) {

if (item_quantity - quantityToSell < 0) {

System.out.println(quantityToSell + " many Item is not in stock!");

} else {

item_quantity -= quantityToSell;

}

}

/**

* @return the tax_rate on item

*/

public float tax_on_Item() {

return TAX_RATE;

}

/**

* @return item details

*/

public String get_Item_Details() {

return "Item_in_Stock [item_code=" + item_code + ", item_name=" + item_name + ", item_description="

+ item_description + ", item_category=" + item_category + ", item_quantity=" + item_quantity

+ ", item_price without tax=" + item_price + ", item_price with tax=" + getItem_price_with_tax() + "]";

}}

public 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 parameter

HPLaptop( HPLaptop obj, String type)

{

super(obj);

this.brand = "HP";

this.type = type;

}

@Override

public String getItemCategory()

{

return "LAPTOP";

}

@Override

public String getItemName()

{

return "HP_Laptop";

}

@Override

public String getItemDescription()

{

return " HP_15_11G_8GB_ITB"";

}

}}