Create a class called Sphere. The class will contain the following Instance data double radius...

Create a class called Sphere. The class will contain the following

Instance data

double radius

Methods

Constructor with one parameter which will be used to set the radius instance data

Getter and Setter for radius

Area - calculate the area of the sphere (4 * PI * radius * radius)

Volume - calculate and return the volume of the sphere (4/3 * PIE * radius * radius * radius)

toString - returns a string with the description of the class which includes the radius.

The class with main will create two instances of the Sphere class, with one call the area and volume and toString methods and display all of the returned data. With the second object call the set method to change the radius to a different value than what was provided as an argument to the constructor. Use the get method to display the radius. Call the area, volume and toString for that instance and display the returned values.

Solutions

Expert Solution

class Sphere {
double radius;

public Sphere() {

}

   /**
   * @param r
   */
   public Sphere(double r) {
       radius = r;
   }

   /**
   * @return
   */
   public double getRadius() {
       return radius;
   }

   public void setRadius(double aRadius) {
       radius = aRadius;
   }

   public double getSurFaceArea() {
       return 4 * Math.PI * radius * radius;
   }

   public boolean checkRadius() {
       return radius > 0;
   }

   public double getVolume() {
       return 4.0 / 3 * Math.PI * (radius * radius * radius);
   }

}

public class TestSphere {
   public static void main(String[] args) {
       Sphere s1 = new Sphere(12);
       System.out.println("Surface Area: " + s1.getSurFaceArea());
       System.out.println("Volume: " + s1.getVolume());

}
}

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