Learning
objectives:
·
Write a Java class.
·
Write multiple constructors.
·
Write a class that creates
objects of another class.
·
Make method calls to a Java
object.
Assignment:
Create a class called Box. This class has three properties, height, width, and depth (all doubles). It has two constructors. One has a single double
parameter, and is used when the box is a cube. The other has three parameters,
and is used when the box has different values for its dimensions. (Visualize a
shoe box.) The book discusses having multiple constructors for a single class
on p. 73.
The class Box has two methods. volume()
computes the volume of the box and returns it as a double. surfaceArea() computes the surface area of the box when it is closed (i.e., all
six faces are taken into account) and returns it as a double.
Create a second Java class called Store. Instantiate three boxes with different dimensions. Make at least
one box a cube and use the single-parameter constructor. Make at least one not
a cube. Display the volumes and surface areas of the three boxes. Be sure that
you create three separate boxes, i.e., not one box used three times.
Submission
instructions:
Upload the files
Box.java and Store.java to “Program 2”. Do not submit class files or any of the BlueJ
control files. Be sure to press the submit button.
Policies:
The policies
given on WebCT are in effect for this and all assignments.
You may submit
on WebCT multiple times, so there is no excuse for not submitting partial
solutions.
