In this lab, you will practice defining and using interface, abstract class, abstract methods , superclass and subclass. You will write an inheritance hierarchy of three-dimensional shapes. Make a top-level shape interface that has methods for getting information such as the volume and surface area of a three-dimensional shape. Then make classes and subclasses that implement various shapes such as spheres, cylinders. You will also place common behavior in superclasses whenever possible, and use abstract classes as appropriate. Add methods to the subclasses to represent the unique behavior of each three-dimensional shape, such as a method to get a sphere’s radius. You need to figure out the formulas to calculate the area, surface area and volume for different shapes.1. Use NetBeans IDE to do the following: a. Start NetBeans.b. Please create a new project in a folder in your H: drive or your own flash drive and name your new project as:COSC241_c. Under the above new created project, please create a package named Lab2d. In the Lab2 package create an interface named Shape3D.java with the following code:// An interface for three-dimensional shapes.public interface Shape3D { public double getVolume(); public double getSurfaceArea();}e. In the Lab2 package create a class named Sphere.java, the class Sphere should implement the interface Shape3d. Define the class Sphere with following requirements:// Represents a perfect sphere.public class Sphere implements Shape3D {//fill in instance fields required by a shape sphere ... //Constructor ... // Define a new methods return the radius COSC241Lab2Page 2 of 4 public double getRadius() { ...// fill in corresponding statement to return the raduis }public double getSurfaceArea() { .... // Fill in statements return the surface area } public double getVolume() { .... //// Fill in statements return the volume }}f. In the Lab2 package create an abstract class named CircularShape.java which implements interface Shape3D. The abstract class CircularShape will work as a superclass. // An abstract superclass for shapes with a circular cross-section.public abstract class CircularShape implements Shape3D { //fill in instance fields required ... //Constructor ... public double getDiameter() { ...// fill in corresponding statement } public double getRadius() { ...// fill in corresponding statement } public double getCrossSectionArea() { ...// fill in statements to return the area of cross section } public double getCrossSectionPerimeter() { ...// fill in statements to return the perimeter of cross section }}g. In the Lab2 package create an abstract class named CircularShapeWithHeight.java which extends CircularShape. The abstract COSC241Lab2Page 3 of 4class CircularShapeWithHeight will be defined with new field data and a new methods as following:// An abstract superclass for shapes with a circular cross-section// that extends over some height.public abstract class CircularShapeWithHeight extends CircularShape { // add new instance of height ... // Constructor ..... public double getHeight() { ....// add statements return the height of the shape }}h. In the Lab2 package create a class named Cylinder.java which extends CircularShapeWithHeight. The class Cylinder will be defined as following:// Represents a cylinder shape.public class Cylinder extends CircularShapeWithHeight {// instance fields ......//Constructor ....... public double getSurfaceArea() { ......// Add statements here to return the surface of the cylinder } public double getVolume() { ........// add statements here to return the volume of the cylinder }}i. In Lab2 package you will create a class called testShapes.java. In the testShapes, created a static void main method where you will test the two different 3-dimensional shapes. You should use Scanner to let user input values from keyboard to define the shapes.The output of running your testShape.java should be like following:Please enter the radius for a sphere:The radius you entered is 5.The surface area of your sphere is 314.1592653589793 and its volumn is 523.5987755982989 Please enter the radius and height for a cylinder:The radius is 5 and the height is 6 . COSC241Lab2Page 4 of 4The surface area of your Cylinder is 345.5751918948772 and its volumn is 471.23889803846896j. Save your files, test the above program, and debug if needed.

In this lab, you will practice defining and using interface, abstract class, abstract methods , superclass and subclass. You will write an inheritance hierarchy of three-dimensional shapes. Make a top-level shape interface that has methods for getting information such as the volume and surface area of a three-dimensional shape. Then make classes and subclasses that implement various shapes such as spheres, cylinders. You will also place common behavior in superclasses whenever possible, and use abstract classes as appropriate. Add methods to the subclasses to represent the unique behavior of each three-dimensional shape, such as a method to get a sphere’s radius. You need to figure out the formulas to calculate the area, surface area and volume for different shapes.1. Use NetBeans IDE to do the following: a. Start NetBeans.b. Please create a new project in a folder in your H: drive or your own flash drive and name your new project as:COSC241_c. Under the above new created project, please create a package named Lab2d. In the Lab2 package create an interface named Shape3D.java with the following code:// An interface for three-dimensional shapes.public interface Shape3D { public double getVolume(); public double getSurfaceArea();}e. In the Lab2 package create a class named Sphere.java, the class Sphere should implement the interface Shape3d. Define the class Sphere with following requirements:// Represents a perfect sphere.public class Sphere implements Shape3D {//fill in instance fields required by a shape sphere ... //Constructor ... // Define a new methods return the radius COSC241Lab2Page 2 of 4 public double getRadius() { ...// fill in corresponding statement to return the raduis }public double getSurfaceArea() { .... // Fill in statements return the surface area } public double getVolume() { .... //// Fill in statements return the volume }}f. In the Lab2 package create an abstract class named CircularShape.java which implements interface Shape3D. The abstract class CircularShape will work as a superclass. // An abstract superclass for shapes with a circular cross-section.public abstract class CircularShape implements Shape3D { //fill in instance fields required ... //Constructor ... public double getDiameter() { ...// fill in corresponding statement } public double getRadius() { ...// fill in corresponding statement } public double getCrossSectionArea() { ...// fill in statements to return the area of cross section } public double getCrossSectionPerimeter() { ...// fill in statements to return the perimeter of cross section }}g. In the Lab2 package create an abstract class named CircularShapeWithHeight.java which extends CircularShape. The abstract COSC241Lab2Page 3 of 4class CircularShapeWithHeight will be defined with new field data and a new methods as following:// An abstract superclass for shapes with a circular cross-section// that extends over some height.public abstract class CircularShapeWithHeight extends CircularShape { // add new instance of height ... // Constructor ..... public double getHeight() { ....// add statements return the height of the shape }}h. In the Lab2 package create a class named Cylinder.java which extends CircularShapeWithHeight. The class Cylinder will be defined as following:// Represents a cylinder shape.public class Cylinder extends CircularShapeWithHeight {// instance fields ......//Constructor ....... public double getSurfaceArea() { ......// Add statements here to return the surface of the cylinder } public double getVolume() { ........// add statements here to return the volume of the cylinder }}i. In Lab2 package you will create a class called testShapes.java. In the testShapes, created a static void main method where you will test the two different 3-dimensional shapes. You should use Scanner to let user input values from keyboard to define the shapes.The output of running your testShape.java should be like following:Please enter the radius for a sphere:The radius you entered is 5.The surface area of your sphere is 314.1592653589793 and its volumn is 523.5987755982989 Please enter the radius and height for a cylinder:The radius is 5 and the height is 6 . COSC241Lab2Page 4 of 4The surface area of your Cylinder is 345.5751918948772 and its volumn is 471.23889803846896j. Save your files, test the above program, and debug if needed.

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

Problem 1PE

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COSC241Lab2Page 2 of 4 public double getRadius() { ...// fill in corresponding statement to return the raduis }public double getSurfaceArea() { .... // Fill in statements return the surface area } public double getVolume() { .... //// Fill in statements return the volume }}f. In the Lab2 package create an abstract class named CircularShape.java which implements interface Shape3D. The abstract class CircularShape will work as a superclass. // An abstract superclass for shapes with a circular cross-section.public abstract class CircularShape implements Shape3D { //fill in instance fields required ... //Constructor ... public double getDiameter() { ...// fill in corresponding statement } public double getRadius() { ...// fill in corresponding statement } public double getCrossSectionArea() { ...// fill in statements to return the area of cross section } public double getCrossSectionPerimeter() { ...// fill in statements to return the perimeter of cross section }}g. In the Lab2 package create an abstract class named CircularShapeWithHeight.java which extends CircularShape. The abstract

COSC241Lab2Page 3 of 4class CircularShapeWithHeight will be defined with new field data and a new methods as following:// An abstract superclass for shapes with a circular cross-section// that extends over some height.public abstract class CircularShapeWithHeight extends CircularShape { // add new instance of height ... // Constructor ..... public double getHeight() { ....// add statements return the height of the shape }}h. In the Lab2 package create a class named Cylinder.java which extends CircularShapeWithHeight. The class Cylinder will be defined as following:// Represents a cylinder shape.public class Cylinder extends CircularShapeWithHeight {// instance fields ......//Constructor ....... public double getSurfaceArea() { ......// Add statements here to return the surface of the cylinder } public double getVolume() { ........// add statements here to return the volume of the cylinder }}i. In Lab2 package you will create a class called testShapes.java. In the testShapes, created a static void main method where you will test the two different 3-dimensional shapes. You should use Scanner to let user input values from keyboard to define the shapes.The output of running your testShape.java should be like following:Please enter the radius for a sphere:The radius you entered is 5.The surface area of your sphere is 314.1592653589793 and its volumn is 523.5987755982989 Please enter the radius and height for a cylinder:The radius is 5 and the height is 6 .

COSC241Lab2Page 4 of 4The surface area of your Cylinder is 345.5751918948772 and its volumn is 471.23889803846896j. Save your files, test the above program, and debug if needed.

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Step 1

Note: Please Check the formulas of Sphere and Cylinder once.

Shape3D Interface:

package Shapes3D;

public interface Shape3D {
public double getVolume();
public double getSurfaceArea();
}

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