We have an external (not within the main class) subclass Circle() in our project

Question

We have an external (not within the main class) subclass Circle() in our project. It is instantiated as an object, myCircle(). In myCircle, we have a get and set method to determine the area as such:

Where it is bold, I added that part of code but I am still missing how the main class accesses the methods. Not sure what I'm missing.

Main class would look like this:

double radius;
//Create a Circle object
Circle myCircle = new Circle();
System.out.print("Enter a radius: ");
radius = in.nextDouble();
myCircle.setArea(radius);
System.out.printf(" The area of this circle is: %.2f ",myCircle.getArea());   
}

The subclass would look like this:

public class Circle
{
double area;
//Set the area
private void setArea(double r){
area = r * r * Math.PI;
}
//Return the area
private double getArea(){
return area;
}

Explanation / Answer

CircleTest.java

import java.util.Scanner;

public class CircleTest {

public static void main(String[] args) {

double radius;

//Create a Circle object

Scanner in = new Scanner(System.in);

Circle myCircle = new Circle();

System.out.print("Enter a radius: ");

radius = in.nextDouble();

myCircle.setArea(radius);

System.out.printf(" The area of this circle is: %.2f ",myCircle.getArea());

}

}

Circle.java

public class Circle
{
double area;
//Set the area
public void setArea(double r){
area = r * r * Math.PI;
}
//Return the area
public double getArea(){
return area;
}
}

Output:

Enter a radius: 5

The area of this circle is: 78.54

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