Designing a Java Program for Sales Tax Calculation

How can you achieve data abstraction and encapsulation in a Java program for sales tax calculation?

What are the necessary steps to design a class for sales tax calculations?

Answer:

To achieve data abstraction and encapsulation in a Java program for sales tax calculation, you need to design a class that represents the concept of Sales Tax. Here are the steps to design the SalesTax class:

1. Define the SalesTax class in a separate Java file to contain data and methods related to sales tax calculations.

2. Identify the required data for sales tax calculations, such as the purchase amount and tax rate.

3. Declare private instance variables like purchaseAmount and taxRate in the SalesTax class to store the data.

4. Provide public getter and setter methods to access and modify the private data. For instance, create getPurchaseAmount() and setPurchaseAmount() methods.

5. Implement a calculateTax() method to compute the sales tax based on the purchase amount and tax rate.

By following these steps, you can ensure data abstraction and encapsulation in your Java program for sales tax calculation.