Design a class named Rectangle (

Rectangle.java

) to represent a rectangle. The class

contains:

?

Two private double data fields named

width

and

height

that specify the width and

height of the rectangle. The default value for

width

is 2.0, and 1.0 for

height

.

?

A public no-arg constructor that creates a default rectangle.

?

A public constructor that creates a rectangle with the specified

width

and

height

.

?

The public accessor and mutator methods for

width

and

height

.

?

A public method named

getArea()

that returns the area of this rectangle.

?

A public method named

getPerimeter()

that returns the perimeter of this rectangle.

Draw the UML diagram (

RectangleUML.docx

) for the class and then implement the

class. Write a test program (

RectangleTest.java

) that creates a Rectangle object with

width 40.0 and height 4.0 and display its width, height, area, and perimeter. Then change

its width to 35.9 and height to 3.5 and display its width, height, area, and perimeter again.

The output should look exactly like the following:

Before the change:

The rectangle's width is 40.00 and its height is 4.00.

Its area is 160.00 and its perimeter is 88.00.

After the change:

The rectangle's width is 35.90 and its height is 3.50.

Its area is 125.65 and its perimeter is 78.80.