6.7. (Part 2) Circle Class - Java
Starting out with Java: From control structures through objects
Chapter 6
Programming Challenges
- Circle class
Write a Circle class that has the following fields:
• radius: a double
• PI: a final double initialized with the value 3.14159
The class should have the following methods:
• Constructor. Accepts the radius of the circle as an argument.
• Constructor. A no-arg constructor that sets the radius field to 0.0.
• setRadius. A mutator method for the radius field.
• getRadius. An accessor method for the radius field.
• getArea. Returns the area of the circle, which is calculated as area = PI * radius * radius
• getDiameter. Returns the diameter of the circle, which is calculated as diameter = radius * 2
• getCircumference. Returns the circumference of the circle, which is calculated as circumference = 2 * PI * radius
Write a program that demonstrates the Circle class by asking the user for the circle’s radius, creating a Circle object, and then reporting the circle’s area, diameter, and circumference.
Gaddis, Tony (2015-05-29). Starting Out with Java: From Control Structures through Objects (Page 398). Pearson Education.
Kindle Edition.
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