Protected and Template method

In this problem, you will create a program that implements the Template method pattern by overriding protected methods to generate two types of reports — SalesReport and InventoryReport — and displays the result to standard output.

Learning Objective: Understand the basics of the Template Method pattern using the protected modifier

Overview

Define a superclass Report with a public method generate() and protected methods formatHeader() and formatBody(). Subclasses SalesReport and InventoryReport override the protected methods to generate different reports.

Input

• Line 1: sales amount (integer)
• Line 2: item count (integer)

Specifications

Report class

• Define public void generate() method
  • Calls formatHeader() and prints its return value
  • Calls formatBody() and prints its return value
• Define protected String formatHeader() method that returns "=== Report ==="
• Define protected String formatBody() method that returns "No data"

SalesReport class (extends Report)

• Accept sales amount (integer) in constructor
• Override formatHeader() to return "=== Sales Report ==="
• Override formatBody() to return "Total sales: $" + salesAmount

InventoryReport class (extends Report)

• Accept item count (integer) in constructor
• Override formatHeader() to return "=== Inventory Report ==="
• Override formatBody() to return "Items in stock: " + itemCount

Main class

• Read sales amount and item count using Scanner
• Create a SalesReport instance and call generate()
• Create an InventoryReport instance and call generate()

Output Format

=== Sales Report ===
Total sales: $<salesAmount>
=== Inventory Report ===
Items in stock: <itemCount>