i.Identify the subclass and superclass.ii.Create other class named Triangle that inherits theproperties from the superclass. Calculate the area ofTriangle in instance method and instantiates object forTriangle class accordingly in main class. Inheritance is a mechanismin which one class acquires the property of an other class.For example, a child inherits the traits of his/her parents.(a)Understand the program code below in Figure 1 and answer thefollowing questions.class shape {protected int length, width;void set (int a, int b) {length = a;width = b; }void show (){System.out.println (length+" "+width); }}class rectangle extends shape {int area;void setArea () {area= length*width;}void show ()System.out.println (area); }}{class AreaRec{public static void main (String [] args){ rectangle r= new rectangle () ;r. Set (4,10) ;r. Show ();r. SetArea () ;r. Show () ;}}Figure 1: Rectangle area

A class that is derived from another class is called a subclass. The class from which the subclass…

Identify the subclass and superclass. Create other class named Triangle that inherits the properties from the superclass. Calculate the area of Triangle in instance method and instantiates object for Triangle class accordingly in main class.

Identify the subclass and superclass. Create other class named Triangle that inherits the properties from the superclass. Calculate the area of Triangle in instance method and instantiates object for Triangle class accordingly in main class.

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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Concept explainers

OOPs

In today's technology-driven world, computer programming skills are in high demand. The object-oriented programming (OOP) approach is very much useful while designing and maintaining software programs. Object-oriented programming (OOP) is a basic programming paradigm that almost every developer has used at some stage in their career.

Constructor

The easiest way to think of a constructor in object-oriented programming (OOP) languages is:

Question

i.
Identify the subclass and superclass.
ii.
Create other class named Triangle that inherits the
properties from the superclass. Calculate the area of
Triangle in instance method and instantiates object for
Triangle class accordingly in main class.

Inheritance is a mechanismin which one class acquires the property of an other class.
For example, a child inherits the traits of his/her parents.
(a)
Understand the program code below in Figure 1 and answer the
following questions.
class shape {
protected int length, width;
void set (int a, int b) {
length = a;
width = b; }
void show ()
{
System.out.println (length+" "+width); }}
class rectangle extends shape {
int area;
void setArea () {
area= length*width;}
void show ()
System.out.println (area); }}
{
class AreaRec{
public static void main (String [] args)
{ rectangle r= new rectangle () ;
r. Set (4,10) ;
r. Show ();
r. SetArea () ;
r. Show () ;}}
Figure 1: Rectangle area

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