Java simple program

CS 181 Homework-3 Dr. Chetan Jaiswal Spring 2018

Q1. (10 points)

Create a class called Invoice that a hardware store might use to represent an invoice for an item

sold at the store. An Invoice should include four pieces of information as instance variables—a

part number (type String), a part description (type String), a quantity of the item being purchased

(type int) and a price per item (double).

Your class should have two overloaded constructors: one as zero argument constructor and the

other as a 4 argument constructor, for initializing the instance variables.

Provide a set and a get method for each instance variable. In addition, provide a method named

getInvoiceAmount that calculates the invoice amount (i.e., multiplies the quantity by the price

per item), then returns the amount as a double value. If the quantity is not positive, it should be

set to 0. If the price per item is not positive, it should be set to 0.0.

Write a test application named InvoiceTest (a driver class) that demonstrates class Invoice’s

capabilities. Try and demonstrate use of all the constructors & methods in the class. Take print

screen of the output of the driver class.

Q2. (10 points)

Create a class called Date that includes three instance variables—a month (type int), a day (type

int) and a year (type int). Provide a three argument constructor that initializes the three instance

variables and assumes that the values provided are correct. Provide a set and a get method for

each instance variable. Provide a method displayDate that displays the month, day and year

separated by forward slashes (/).Write a test application named DateTest (a driver class) that

demonstrates class Date’s capabilities and the use of “this” reference. Try and demonstrate use of

all the constructors & methods in the class. Take print screen of the output of the driver class.

Instructions:

What to submit: All Source code + print screen of the output of the driver class

When to submit: Midnight, Mar 1 2018.

Where to submit: Blackboard->Assignments

Format: PDF