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. •  area. Returns the area of the circle, which is calculated as area = PI * radius * radius •  diameter. Returns the diameter of the circle, which is calculated as diameter = radius * 2 •  circumference. 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.

Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
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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.
•  area. Returns the area of the circle, which is calculated as
area = PI * radius * radius
•  diameter. Returns the diameter of the circle, which is calculated as
diameter = radius * 2
•  circumference. 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.

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