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How to do simple class Circle with one field radius.Supply one constructor that makes the radius of the circle as a parameter.Supply one method getArea ,that computes and returns (not prints)the area of a circle.Provide the accessor method getRadius.How to create a small class CircleTest with a main method that prompts the user to enter an integer value for the radius,creates one Circle object with that radius,calls it getArea method,and prints out the returned value.

Respuesta :

ijeggs

Answer:

import java.util.Scanner;

public class Circle {

   private double radius;

   //The constructor

   public Circle(){

       

   }

   //Method to compute and return the area

   public double getArea(double radius){

       double area = Math.PI *(radius*radius);

       return area;

   }

   //Accesor method (getRadius)

   public double getRadius() {

       return radius;

   }

}

class CircleTest{

   //The main method

   public static void main(String[] args) {

       //Scanner Class to receive user input

       Scanner in = new Scanner(System.in);

       System.out.println("Enter Radius");

       double r = in.nextDouble();

       //Make an instance of the class Circle

       Circle circle = new Circle();

       //Calculating the area

       double calArea = circle.getArea(r);

       //Printing out the area

       System.out.println("The area is: "+calArea);

   }

}

Explanation:

  • This has been solved with Java Programming Language
  • Please follow the comments in the codes
  • As required, The class Circle is created with one member variable radius
  • A getter method is also created
  • A method getArea is also created that computes and returns the area of the circle
  • In the class CircleTest The scanner class is used to receive a user value for radius
  • An instance of Circle class is created
  • The method getArea is called with the instance of the class
  • The area is printed out

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