Java Tutorial: Exercise & Practice Questions on Inheritance

[@sadashish2002]

Bhaiya aap Ko jitna thanks bolun utna kamm hai ,aapne jitni asaani se computer language ,DS ALGO aur v bahut kuch samjhaya hai wo kaabil-e-taarif hain. Aise hi hummm village student k liye aap hard work karte rahiyega .Aapke video kaa mera 10 student ka group humesha wait karte rahte hain .love u bhaiya from Deoghar ,Jharkhand.😍😍🙏🙏

[@ashokgawate1561]

Android Development course with notes 🔥 Requesting Again

[@yuggupta9371]

Pls make

[@bhupeshpattanaik7150]

+1

[@harshpanchal9470]

yes please

[@yashmalviya7954]

C ex

[@ankurddank_afmishra1196]

bnaya hua h dalle

[@sajjuso2576]

Bhai i am attending your lectures on html,css and js.Abhi tho 22 lecture pe pohonch gaya hoo very benefitial.🙏🏻🙏🏻🙏🏻

[@mishikhan3765]

Yes Sir, I will Calculate area and volume for Question 2

[@anujpatel2121]

I am totally into this course!!!!!!!!

[@rajendraprajapati.4083]

Thanks Harry Bhai 🤍 For growing confidence

[@pranayvankar3490]

I calculated the area & volume of the rectangle and cuboid respectively:)

[@amandevrani1898]

Buddy Please help..
Volume always comes as 0
import java.util.Scanner;
class Rectangle {
public int length, breadth;
public void setLength(int length) {
this.length = length;
}
public void setBreadth(int breadth) {
this.breadth = breadth;
}
public int area() {
return this.length * this.breadth;
}
}
class Cube extends Rectangle{
public int height;
public void setHeight(int height) {
this.height = height;
}
public int volume()
{
return this.height* this.length * this.breadth;
}
}
public class practicesat {
public static void main(String[] args) {
Rectangle r = new Rectangle();
Scanner sc = new Scanner(System.in);
System.out.println("Enter Length");
int l = sc.nextInt();
r.setLength(l);
System.out.println("Enter Breadth");
int b = sc.nextInt();
r.setBreadth(b);
System.out.println("AREA is " + r.area());
Cube c = new Cube();
System.out.println("Enter Height");
int h = sc.nextInt();
c.setHeight(h);
System.out.println("Volume is " + c.volume());
}
}

[@bayyarohith1507]

@@amandevrani1898 Use constructors bro.
This code is lengthy. You will get answers then

[@bayyarohith1507]

@@amandevrani1898If you want do by the code above given, then you should call the methods of SetLength,SetBreadth from object c(cube object) then you will get the answers

[@abheygupta2332]

14:37
I will definitely do it!

[@spradhan5316]

Hii bro❤️

[@sahilaggarwal3831]

answer bhjio bro. 4 ka

[@zuhaibulhassan.]

Thank You Harry Bhai for your efforts

[@Allin-dd8gj]

Constructors Code ko bahot easy bana deta hai Q.4 me pata chala
Thanks Harry bro ❤❤

[@sudarshant8783]

Questions 2 and 4
class rectangle1
{
private float width,breadth;
public float getWidth() {
return width;
}
public void setWidth(float width) {
this.width = width;
}
public float getBreadth() {
return breadth;
}
public void setBreadth(float breadth) {
this.breadth = breadth;
}
float area()
{
return width*breadth;
}
}
class cuboid extends rectangle1
{
private float height;
public float getHeight() {
return height;
}
public void setHeight(float height) {
this.height = height;
}
float volume()
{
return area()*height;
}
}
public class CWH_52_ch10_ps {
public static void main(String[] args) {
rectangle1 rec=new rectangle1();
cuboid obj=new cuboid();
rec.setWidth(5);
rec.setBreadth(8);
obj.setHeight(10);
obj.setWidth(6);
obj.setBreadth(3);
System.out.println("The width of the rectangle is "+rec.getWidth());
System.out.println("The breadth of the rectangle is "+rec.getBreadth());
System.out.println("The area of the rectangle is "+rec.area());
System.out.println("The width of the cuboid is "+obj.getWidth());
System.out.println("The breadth of the cuboid is "+obj.getBreadth());
System.out.println("The height of the cuboid is "+obj.getHeight());
System.out.println("The volume of the cuboid is "+obj.volume());
}
}

[@komalKumari-qy7gg]

U didn't used "this" keyword in area method of class rectangle

[@subhajitkhasnobish2370]

return area()*height
will throw error.

[@Luffy_2804]

@@komalKumari-qy7gg it's not necessary to use but sometimes it is when the name of the local variable is same as instance variable in the class

[@niteshkumbhare8209]

width height breadth private kyu liya public chahiye tha n??

[@hritikrai15_27]

@@niteshkumbhare8209 jaruri nhi hai private bhi de sakte hai par fir sab private mei dene padenge eek pirvate or eek public nhi de sakte

[@tejalchavan1344]

Congrats for 777k subscribers

[@sudharshanvijay2337]

Thank you! Liked.

[@badalsahoo3902]

#Main karunga all problems solve harry bhai❤

[@guneshwarbaghele8569]

Teaching nice sir 👌👍

[@_devenderpal_]

I will do it!👍

[@royfamily9273]

Thanks Harry Bhaiya

[@omkargadekar52]

Harry Bhai , ur r really awesome😍🥰😘😘

[@technikalproblem6780]

Thanks a lot for creating this video!

[@PragunSharma-fi7ou]

14:45 , I will calculate Area and Volume for Question-2

[@karanpatel592]

Done? 😅

[@PragunSharma-fi7ou]

@@karanpatel592 yes bro

[@sankhasen3702]

Happiest learning with CodeWithHarry ...

[@adityapradhan8474]

majja agyaa solve karke

[@MarufKhan790]

// I will complete questions
class Rectangle {
// area of rectangle = lXB
public int length;
public int breadth;
// constructor
Rectangle() {
System.out.println("I am non parameterized constructor of rectangle");
}
Rectangle(int l, int b) {
System.out.println("I am parameterized constructor of rectangle");
}
public int getLength() {
return length;
}
public void setLength(int length) {
this.length = length;
}
public int getBreadth() {
return breadth;
}
public void setBreadth(int breadth) {
this.breadth = breadth;
}
// method
public int area() {
return this.length * this.breadth;
}
}
class Cuboid extends Rectangle {
// Surface area of Cuboid = 2*lb +2*bh+ 2*hl
// constructor
public int height;
Cuboid(int l, int b, int h) {
super(l, b);
System.out.println("I am cuboid parameterized constructor");
}
//method
public int surfacearea() {
return 2 * (this.length * this.breadth) + 2 * (this.breadth * this.height) + 2 * (this.height + this.length);
}
}
public class inheritance_rectangle {
public static void main(String[] args) {
// System.out.println("ya devlat basa ya kusgun lese");
// Rectangle r = new Rectangle();
// r.area();
// Cuboid obj = new Cuboid(84,4,2);
Cuboid obj = new Cuboid(63,33,33);
// getters and Setters
// Rectangle r = new Rectangle();
// r.setLength(3);
// r.setBreadth(9);
//
// System.out.println(r.getLength());
// System.out.println(r.getBreadth());
}
}

[@Mr.AIAnukalp]

kya bakwas code likha hai

[@mirenayatali1257]

​@@Mr.AIAnukalpiss ko mene Execute bi kiya Sala Run he nahi hua

[@mr.shreyas7838]

​@@mirenayatali1257😂

[@SagarLonkar75]

Harry bhai ek dil dedo ❤️❤️❤️

[@prathameshadawale8752]

yes sir i wii do

[@rajatchaurasia3578]

Present sir 👌🏻❤👌🏻👌🏻❤👌🏻❤

[@himanshumohod9467]

Sout(“brilliant harry bhai”);

[@sahil704]

I will calculate area and volume question number 2❤❤❤

[@subratbuddy5615]

Love u harry bhai ❤❤

[@fatimataiba5294]

I will calculate que 2 for sure...will try my best

[@ManikaSirohi]

U are working very hard sir for us.. thankyou❤️🥰🥰🥰

[@gkanything9567]

Thanks a lot sir 🔥 🔥 🔥 🔥

[@ferinpatel6677]

Thanks for your coursh

[@adityawaghmode4751]

13:14
class Rectangle1{
private double length;
private double breadth;
Rectangle1(){
System.out.println("I am non param of Rectangle1");
}
Rectangle1(double l,double b){
System.out.println("I am Rectangle1 parameterized constructor");
this.length = l;
this.breadth = b;
}
public double getLength() {
return length;
}
public double getBreadth() {
return breadth;
}
public double area(){
return length * breadth;
}
}
class Cuboid1 extends Rectangle1{
private double height;
public double getHeight() {
return height;
}
Cuboid1(double l, double b, double h){
super(l,b);
System.out.println("I am Cuboid1 parameterized constructor");
this.height = h;
}
public double volume(){
return this.getLength() * this.getBreadth() * this.height;
}
}
public class AccessModifiersProbs {
public static void main(String[] args) {
// Cuboid1 obj = new Cuboid1(14,15,16);
// Rectangle1 objR = new Rectangle1(24,25);
Cuboid1 Cub = new Cuboid1(15,30,45);


}
}

[@neelakashchatterjee1725]

The chapter 10 notes are missing , you've only uploaded the practice questions pdf . It would be very kind of you if you could provide us with the pdf of the notes as well . Thank you .

[@crazyduniya128]

Yes

[@SachinYadav-ss3nf]

Yes

[@crazyduniya128]

******ATTENTION ⚠******
JOIN CODEWITHHARRY FANCLUB GROUP ON FACEBOOK AND SHARE ALL VIDEOS OF HARRY BHAI, IT IS LIKE A GIFT TO HARRY BRO FROM US.
LET'S GO
(1 MILLION SUBSCRIBER CONGRATULATION PRESENT IN ADVANCE )
*****PLEASE DON'T IGNORE THIS *****

[@UTKARSHYADAV-im2tc]

Bro PDF kaha milti h bta do mujhe mil nhi rhi please bhai

[@crazyduniya128]

@@UTKARSHYADAV-im2tc description me link h

[@yashnanera3416]

Harry bhaiya, sub class ke constructor mein print statement ke baad super keyword ka use kiya to print statement pehle run hoga ya super constructor pehle run hoga, 🤔 answer plz 🙏

[@TAHASAYYED-k9t]

Bhai code krke dekhle

[@harshit_gupta_haryana]

Setup Tour Please ! ! ! 😁😁

[@sagarnanda9457]

Thx bhaiya 💙

[@kingsmann_21]

@codewithharry please Data structure using java bhi course me add kr dena please .....🤗🙏

[@rutikmunjamkar4721]

great questions

[@codingexercise]

Loved this vdo bro plz make vdo on flutter

[@abhiramv6099]

good video harry bhai

[@anamika_deb]

Will do for sure

[@yousufhassan5494]

questiob 2 answer;
class Rectangle {
public int radius;
public int length;
public int width;

Rectangle() {
System.out.println("I have nothing to say");
}

Rectangle(int w, int l) {
System.out.println("I am parameterized constructor");
this.length = l;
this.width = w;
}

public double perimeter() {
return 2 * (this.length + this.width);
}
public double area() {
return this.length * this.width;
}
}
class Cuboid extends Rectangle {
public int height;

Cuboid(int w, int l, int h) {
super(w,l);
System.out.println("I am parameterized constructor of Cuboid");
this.height = h;
}

public double volume() {
return this.length * this.width * this.height;
}

public double surfaceArea() {
return 2 * (this.length * this.width + this.length * this.height + this.width * this.height);
}
}
public class inheritancekysawal {

public static void main(String[] args) {

Cuboid bankia = new Cuboid(34, 37, 37);

System.out.println("Area of Rectangle: " + bankia.area());
System.out.println("Perimeter of Rectangle: " + bankia.perimeter());
System.out.println("Surface Area of Cuboid: " + bankia.surfaceArea());
System.out.println("Volume of Cuboid: " + bankia.volume());
}
}

[@codemc7376]

0:11 , Q-1
class Circle_{
Circle_(){
System.out.println("Me Circle!");
}
}
class Clyender_ extends Circle_{
Clyender_(){
System.out.println("Me Clyender");
}
}

[@AbdullahKafi-wp2me]

video 52 done 😊😊

[@AbhishekSingh-cu1fe]

14:38
I will solve it sir
Thank you🙏

[@Ayan12337]

Same

[@ratnakantahanse2661]

Thank you Harry sir 🎉..

[@harshaljadhav208]

I am doing timepass here, but not only doing timepass ✌✌

[@n_kumar_15]

14:47 --> I will calculate area and volume of question number 2

[@AnkushSaral]

14:48 I will calculate area and volume for question number 2

[@anonymousperson9929]

Was just watching your advanced python.

[@robin5872]

I Will Done It !!!

[@atul8423]

//Question no 2 & 4
//we can also small over code using only constructor;
class Rectangle{
int l;
int w;
Rectangle(int l, int w){
System.out.println("I'm the contructor of rectangle class");
}
public int getLength(){
return l;
}
public void setLength(int l){
this.l = l;
}
public int getWidth(){
return w;
}
public void setWidth(int w){
this.w = w;
}
public int areaOfRectangle(){
return l*w;
}
}
class Cuboid extends Rectangle {
int h;
int b;
Cuboid(int l , int w , int b , int h){
super(l,w);
System.out.println("I'm the overloaded contructor of Cuboid ");
}
public int getBreadth(){
return b;
}
public void setBredth(int b){
this.b = b;
}
public int getHeight(){
return h;
}
public void setHeight(int h){
this.h = h;
}
public int areaOfCUboid(){
return 2*l*b + 2*l*h + 2*h*w;
}
}
public class CWH_52_Inheritance_PracticeSet {
public static void main(String[] args) {
// cylinder c = new cylinder(4,5);
// System.out.println(c.volumeOfCylinder());
Cuboid a = new Cuboid(4,3 ,34,9);
a.setLength(4);
a.setWidth(3);
a.setHeight(9);
a.setBredth(34);
System.out.println(a.areaOfCUboid());
}
}
Thanks harry sir for this amazing course.

[@NP_Targetor]

it working

[@atul8423]

@@NP_Targetor 😊😊

[@Atulsingh-df9it]

Harry bhai ek doubt clear kr do ,
Circle c = new cylinder (3) ;
Mai is trh se , Circle class ka constructor kyu nhi invoke kr skta ?

[@vikaschauhan5364]

Great work sir!!

[@MuhammedIrfan01]

I will do it!

[@vishal.011]

To see all the questions 0:50

[@MizanurRahaman03]

yes i will calculate area and volume for question no 2

[@karanbhanushali6756]

Question 1 and 3
class circle
{
float r ;
}
class cylinder extends circle
{
float h ;
double area , vol ;
void res()
{
area = 3.1*r*r ;
vol = 3.1*r*r*h ;
System.out.println(" Area and volume are ") ;
System.out.println(area) ;
System.out.println(vol) ;
}
}
public class Main
{
public static void main(String [] args)
{
cylinder k = new cylinder() ;
k.r = 1 ;
k.h = 1 ;
k.res() ;
}
}

[@MohitYadav-uf2mf]

14:43 yes bhaiya I will do it

[@hrishikeshpatel6670]

Sir plzzz one video on object detection in python plzzzz 🙏🙏🙏

[@shaileshhacker]

Thank You

[@DR-xz3dk]

I'm in java array element. And lo another video got uploaded 😂👍

[@umeshchandra7441]

😂

[@subhajitdas7782]

14.40 done sir.

[@sahilaggarwal3831]

answer bhjio bro. 4th ka

[@himankjeshwar8636]

I will calculate area and volume for question 1 and 2

[@harshit0203]

QUESTION 2 AND 4:
class RectangleR{
RectangleR(){
System.out.print("The perimeter of the Rectangle is: ");
}
public int length;
public int width;
public int getLength() {
return length;
}
public void setLength(int length) {
this.length = length;
}
public int getWidth() {
return width;
}
public void setWidth(int width) {
this.width = width;
}
RectangleR(int l , int w){
this.length = l; this.width = w;
}
public double perimeter(){
return 2* (this.length + this.width);
}
}
class Cuboid extends RectangleR{
public int height;
public int getHeight() {
return height;
}
public void setHeight(int height) {
this.height = height;
}
Cuboid(int l , int w , int h){
super(l,w);
this.height = h;
}
public double perimeter(){
return 4 * (this.length + this. width + this.height);
}
}
// UNDER MAIN FUNCTION
// PROBLEM 2 & 4:
RectangleR objR = new RectangleR();
objR.setLength(4); objR.setWidth(5);
System.out.println(objR.perimeter());
Cuboid Cuboid = new Cuboid(4,5,6);
System.out.println("Perimeter of Cuboid : " + Cuboid.perimeter());
}
}

[@pranavkatyayen9923]

perfect

[@shivamsrivastava5827]

14:42
I will calculate are & volume of question no. 2.

[@AmanKumar-kn9to]

Sir Android ka one short hai Kya jese c kaa hai

[@ayushgupta_3017]

kr diya bhai solve
waise to ma;um hai ki ab tum apna commrnt nhi dekhne wale ho, kya hi frk padta hoga ab 😅
but fir bhi effort bohot jyada ki hai aapna

[@dheerajchavan45]

Q.1 & Q.3 ------------------------> ( not used constructors only methods used )
import java.util.Random;
import java.util.Scanner;
class Circle {
public double r ;
public double areacr (double r) {
this.r =r ;
double ar = Math.PI * this.r * this.r ;
return ar ;
}
}
class Cylinder extends Circle {
public double h ;
public double areal (double r , double h) {
this.r = r;
this.h = h;
double al = (2 * Math.PI * this.r * h) + (2 * Math.PI * this.r * this.r);
return al ;
}
public double volumel (double r , double h) {
this.r = r;
this.h = h;
double vl = Math.PI * this.r * this.r * h ;
return vl ;
}
}
class Cone extends Circle {
public double l ;
public double arean (double r , double l) {
this.r = r;
this.l = l;
double an = Math.PI * r * ( r + (Math.sqrt((r*r) + (l*l)) ));
return an ;
}
public double volumen (double r , double l) {
this.r = r;
this.l = l;
double vn = Math.PI * this.r * this.r * l / 3 ;
return vn ;
}
}
public class Arrayss {
public static void main (String[]args) {
Cylinder l = new Cylinder();
double al = l.areal(3,5) ;
double vl = l.volumel(3,5) ;
System.out.println(al);
System.out.println(vl);
Cone n = new Cone();
double an = n.arean(3,5);
double vn = n.volumen(3,5);
Circle c1 = new Cone();
double x = c1.areacr(5);
System.out.println("ac=" + x);
Cone c2 = new Cone();
double y = c1.areacr(5);
System.out.println("ac=" + y);
System.out.println(an);
System.out.println(vn);
}
}

[@sajaljain2885]

Extend karke inherit karte hai, and use object banake hi use karte hai, bina extend kiye bhi to use kar sakte hai object banake , so extends ka kya advantage hai, please answer bhaiya

[@subzeroforyou3728]

thank you sir

[@passiontoyoursuccess3560]

Sir aapne jo Website bnai hui he usme jo Contect me ! Wala page he usme Submit ka button kaam nhi kar rha he pls check

[@CodeWithGillix]

Ha yrr
Bat to Shi h

[@abhishekprasad9276]

Harry bhai data structures ko continue kro plzzzzzzz 🙏

[@oyesoyam]

i will calculate area and volume of the this one

[@varshabojja]

@CodeWithHarry can you tell how can we access the in lectures code program

[@techsutra4917]

maan gaye guru ~May 12,2k21 (11:48 pm)

[@pranavgondepatil5872]

Solution of Q.2 and Q4 :) :)
↓
class rectangle {
public int length;
public int breadth;
rectangle() {
System.out.println("I am Default Constructor of rectangle");
}
rectangle(int length, int breadth) {
System.out.println("I am Parameterized Constructor of rectangle");
this.length = length;
this.breadth = breadth;
}
public void setlength(int length) {
this.length = length;
}
public void setbreadth(int breadth) {
this.breadth = breadth;
}
public int getlength() {
return length;
}
public int getbreadth() {
return breadth;
}
public int area() {
return length * breadth;
}
}
class Cuboid extends rectangle {
public int height;
Cuboid(int length, int breadth, int height) {
super(length, breadth);
System.out.println("I am Parameterized Constructor of Cuboid");
this.height = height;
}
public void setheight(int height) {
this.height = height;
}
public int getheight() {
return height;
}
public int Surfacearea() {
return 2 * length * breadth + 2 * breadth * height * +2 * length * height;
}
}
public class rectangle_Cuboid {
public static void main(String[] args) {
// rectangle r = new rectangle(3,2);
Cuboid c = new Cuboid(3, 2, 6);
c.setlength(3);
c.setbreadth(2);
c.setheight(6);
System.out.println(c.getlength());
System.out.println(c.getbreadth());
System.out.println(c.getheight());
// System.out.println(c.getlength() * c.getbreadth() * c.getheight());
System.out.println(c.Surfacearea());
}
}

[@sofianashfaqabbasi3363]

If length is private then how we can pass the values

[@tigercoder5067]

Harry brother how do you edit videos
Because your video is very nice

[@havingsportsaddiction3849]

Create a full tutorial series on artificial intelligence

[@yuggupta9371]

YES PLS MAKE

[@havingsportsaddiction3849]

Make a complete tutorial on artificial intelligence

[@susmitakundu3098]

amazing...

[@sting8gaming963]

harry bhai mera itellij idea par kisibhi file ke upar right click karne par "Run" ka option nhi dikha raha hai . bhai please mera problem solve kijiye . Right-click on a test class does not show the "run" options .

[@shivanshutyagi83]

Harry bhai 👋👋

[@krish-rs8qf]

I will do it.

[@pratikharde21]

Hey dada, sbb notes 📝 ka pdf ek sath banao na plzz, 🤗🙏🏻🙏🏻

[@UTKARSHYADAV-im2tc]

Mujhe bhi chaiye mil nhi rhi but

[@ashwing924]

Hi Please Make a Full Beginner Tutorial of KIVY...

[@nayannandi1321]

Make video on algo trading using ML

[@shubhamkumarmathur7767]

I had done this area and volume

[@MohammedRabban-iz5bk]

i will calculate area and volume for question number 4

[@abhaygaikwad9894]

I will Calculate area and volume for Question 2

[@karansingh02]

Chapter 10 notes are missing you have just uploaded the practise set of Chapter 10.
Please see......
And thanks for this course

[@Injamul-Haque0]

harry bhai op

[@138-meetsavaliya4]

Any on face create breakpoint problem?
How to solve problem?

[@neelkhandare5057]

Make course on angullar.js and react.js

[@chaoticyatan7115]

14:44 i will calculate area and volume for question 2. Sirf likha nahi hai, karunga bhi

[@RahulSingh-xe2gq]

Ques2 and Ques4:
class Rectangle{
public int length;
Rectangle(){
System.out.println("I am a non-parameterised constructor , I am called by default if there is no super class define");
}
Rectangle(int l, int b){
System.out.println(" I am parameterised constructor");
}
public int getLength() {
return length;
}
public int getBreadth() {
return breadth;
}
public int breadth;
public void setLength(int l){
this.length=l;
}
public void setBreadth(int b){
this.breadth =b;
}
public int Area(int l,int b){
return l*b;
}
}
class Cuboid extends Rectangle{
public int height;
Cuboid(int l, int b, int h){
super(l,b); /* calling parent class constructor with 2 parameter inside it. */
this.height=h;
System.out.println("this is sub class constructor");
}
public int Volume(){
return (2*(length)*breadth)+(2*height*breadth)+(2*length*height);
}
}
public class practice12 {
public static void main(String[] args) {
// Cylinder1 d=new Cylinder1(12,5);
// Circle c= new Circle();
// Rectangle r=new Rectangle(2,3);
Cuboid c= new Cuboid(2,3,4);
//setting length
c.setLength(2);
//setting breadth
c.setBreadth(3);
System.out.println(c.Volume());
}
}

[@satyam8280]

Please do live sessions also because there are some topics which are not clear for us and there are many confusions also.

[@cyanport]

harry bhai please make a video over
const REQUEST = "how to host a website" ;