Answer to Question #310053 in Java | JSP | JSF for Tsundzu

Question

A Retail has name, a List containing Items available in the stock and another List containing sold 

items. [2]

1.2 A Retail have functionality to view available stock, that prints Class name of item, name of Item, 

size of item and total number of items that have same name, and size. [5]

EXAMPLE 

ClassName Item name Size Total

Drink coke 1 10; // this show that in the list there are 10 coke that are size of 1

Drink coke 2 5; // this show that in the list there are 5 coke that are size 2

Sizes in drinks means litres.

Hint: Items are the same if their class name, item name and size are the same.

1.3. A retail Shop has a functionality to add item into the stock list. The add item takes a parameter 

the Item to be added on stock. [2]

1.4 A retail shop also has a functionality to calculate total sales that returns double sum of money 

made from all sold items. [2]

Answer 1

import java.time.Duration;

import java.time.LocalDateTime;

import java.util.*;

public class RetailShop {

public Map<String, Item> stock = new HashMap<>();

public Map<String, Integer> sold = new HashMap<>();

public void sell(String itemName, int itemSize) {

Item itemInStock = stock.get(itemName);

if (itemInStock != null && itemInStock.getAmount() >= itemSize) {

itemInStock.setAmount(itemInStock.getAmount() - itemSize);

sold.merge(itemName, itemSize, Integer::sum);

long daysBeforeExpiry = Duration.between(LocalDateTime.now(), itemInStock.getExpiryDate()).toDays();

System.out.println("Name: " + itemName);

System.out.println("Size: " + itemSize);

System.out.println("Days before expiry date: " + daysBeforeExpiry);

} else {

System.out.println("no stock");

}

}

}

import java.time.LocalDateTime;

public class Item {

private String name;

private double price;

private int amount;

private LocalDateTime expiryDate;

public Item(String name, double price, int amount, LocalDateTime expiryDate) {

this.name = name;

this.price = price;

this.amount = amount;

this.expiryDate = expiryDate;

}

public int getAmount() {

return amount;

}

public void setAmount(int amount) {

this.amount = amount;

}

public double getPrice() {

return price;

}

public void setPrice(double price) {

this.price = price;

}

public String getName() {

return name;

}

public void setName(String name) {

this.name = name;

}

public LocalDateTime getExpiryDate() {

return expiryDate;

}

public void setExpiryDate(LocalDateTime expiryDate) {

this.expiryDate = expiryDate;

}

}