Solution for the exercise:::: ----------------------------------------------------------------- import java.util.*; abstract class Common{ int length,breadth; abstract int area(); } class Square extends Common{ int length; Square(int length){ this.length=length; } int area(){ return length*4; } } class Triangle extends Common{ int length,breadth,height; Triangle(int length,int breadth,int height){ this.length=length; this.breadth=breadth; this.height=height; } int area(){ int a=breadth*height; return a/2; } } public class Main { public static void main(String[] args) { ArrayListc = new ArrayList(); c.add(new Square(4)); c.add(new Triangle(2,4,4)); for(Common i:c){ System.out.println(i.area()); } } }
Mam, I have an one doubt? What's the difference between ( Member m1 = new Student(); and Student s1 = new Student(); ) in the time of object initialization?
Actually in Member m1 means, not memory allocation in heap for base class(m1), you just create a member class object reference variable. New student(); means create a new child class (Student)object.this is what memory allocation for child class. That child class reference assigning to the base class object variable. In base class object variable we can store base class object reference and also can store child class object reference.(polymorphism) You can't create new object for base class.{new memeber ().} Because base class is a abstract class.
Becoz all students ,teachers and Staffs were under the inheritance of Member class. We can't able to create different arrays for different classes (becoz it's a long process.)
Mam member class ku array objects create panum pothu new Member [ ]; nu podurom. New keyword abstract class ku use panna kudathu sonnigalay mam. elements kaana index references create pandrathunala athu allow pannuthaanga maa New Member( ); Ipdi podum pothu heap la oru object create pandrathunaala allow pannaliya mam. Correct taanu sollunga mam
Mam first u said for abstract u can't create object but after very mins u create array object for abstraction mam.so my question if array means i create for abstraction?? confuse mam
No no. I have mentioned in the video. on left side of = you can create a reference of abstract class. But on right side you cannot create abstract object with the "new" keyword. Observe carefully.
Hii akka 😊😊 akka nenga nala solli tharinga akka enaku oru help akka na ippo second year akka Na BTech IT group akka enaku Java solli Kudukiringala akka plz 🙏
Your java playlist is one of the best java tutorial in youtube
Unga voice super aa iruku 😍😍 also explaining slang also just awesome 😎
abstract class shape{
abstract void area(int a,int b);
}
class square extends shape{
public void area(int a,int b){
System.out.println(a*b);
}
}
class triangle extends shape{
public void area(int a,int b){
System.out.println(a*b/2);
}
}
class Main
{
public static void main(String[] args) {
square s=new square();
triangle t= new triangle();
s.area(10,20);
t.area(10,20);
}
}
How can you give two parameters for square?
Please add all the codes in description, it will be easy for us to revise before the interview day
14:20
define panniye aganum nu nammala thitudhuuu.....👍🤣🤣😝😝🤣🤣ultimate nga
object names m1 and m, m2,m3,m4 nu kodukama unique names koduthu explain panni innum nalla puriyum
Vera level ka🤩spr a purithu
your voice so cute and explain slag also very nice and easy to understand very well thank you class mam😍😃
Thanks Mam. Best Explanation 👍
Mam Your Teaching is Very easy to learn ....Please do the playlist for DBMS and SQL
Please for sql video
i have added mysql playlist
You make it easy...Thank you Mam.
நன்றி அக்கா 🙏
thank you so much.....your explanation is very clear for all the topics.
Solution for the exercise::::
-----------------------------------------------------------------
import java.util.*;
abstract class Common{
int length,breadth;
abstract int area();
}
class Square extends Common{
int length;
Square(int length){
this.length=length;
}
int area(){
return length*4;
}
}
class Triangle extends Common{
int length,breadth,height;
Triangle(int length,int breadth,int height){
this.length=length;
this.breadth=breadth;
this.height=height;
}
int area(){
int a=breadth*height;
return a/2;
}
}
public class Main
{
public static void main(String[] args) {
ArrayListc = new ArrayList();
c.add(new Square(4));
c.add(new Triangle(2,4,4));
for(Common i:c){
System.out.println(i.area());
}
}
}
Wow excellent thank u so much
Hi cute explanation And sweet voice
Mam can you please add the code in the description or in the pinned comments so that we can revise easily before exam??
chk github link.
Mam, I have an one doubt? What's the difference between ( Member m1 = new Student(); and Student s1 = new Student(); ) in the time of object initialization?
Actually in Member m1 means, not memory allocation in heap for base class(m1), you just create a member class object reference variable.
New student(); means
create a new child class (Student)object.this is what memory allocation for child class.
That child class reference assigning to the base class object variable.
In base class object variable we can store base class object reference and also can store child class object reference.(polymorphism)
You can't create new object for base class.{new memeber ().}
Because base class is a abstract class.
@@sivamsivam700but here we cannot create the object for base class. right ? then what is the purpose of declaring Member m1 here ? just a query.
Becoz all students ,teachers and Staffs were under the inheritance of Member class. We can't able to create different arrays for different classes (becoz it's a long process.)
12:11 line 5 la abstract void ah //committed pannirunga abstract ah remove pannitu verum void method kodukalamay.??
package Absract;
abstract class Shape
{
abstract void area(int n);
}
class Square extends Shape
{
void area(int n)
{
System.out.println("Square:" + (n * 4));
}
}
class Triangle extends Shape
{
void area(int n)
{
System.out.println("Triangle:" + (n * 3));
}
}
public class Exercise {
public static void main(String[] args) {
Shape[] s = new Shape[2];
s[0] = new Square();
s[1] = new Triangle();
for(Shape s1: s)
{
s1.area(4);
}
}
}
Super akka I got the output
Mam, abstract methodla irukura concrete methods and variablesa eppadi access pandradhu.derived classla Override pannama access panna mudiyuma?
super video akka
Answer for the Question
// Shape
public abstract class Shape {
abstract void area();
}
class Square extends Shape {
private double side ;
public Square(double side){
this.side = side;
}
@Override
void area(){
double squareArea = side*side ;
System.out.println("Area of Square ="+squareArea);
}
}
class Triangle extends Shape {
private double height ;
private double base;
public Triangle(double height,double base){
this.height = height;
this.base = base;
}
@Override
void area() {
double triangleArea = 0.5 * base * height;
System.out.println("Area of Triangle ="+triangleArea);
}
}
//Main class
public class Main {
public static void main(String[] args) {
Square square = new Square(23);
Triangle triangle = new Triangle(20,10);
// triangle.area();
// square.area();
Shape[] area = new Shape[3];
area[0]= new Square(10);
area[1]= new Triangle(20,10);
area[2]= new Square(30);
for (int i = 0; i < area.length ; i++) {
area[i].area();
}
}
}
Great explanation
Do you have a solution for this exercise? I got an error..
Nice voice slang
Mam member class ku array objects create panum pothu
new Member [ ]; nu podurom.
New keyword abstract class ku use panna kudathu sonnigalay mam.
elements kaana index references create pandrathunala athu allow pannuthaanga maa
New Member( );
Ipdi podum pothu heap la oru object create pandrathunaala allow pannaliya mam.
Correct taanu sollunga mam
Hats off !
vara level mam 🙏🥰🥰🥰
Thank you 🙂👍
Do you have a solution for this exercise?
So basically idhu inheritance dhane?
Mam..neenga last ah kudukura programs ku ans enga iruku??
akka...java ku unga videos pathale concepts lan clear ah irrukum la???...
Yes. For understanding all concepts its enough.
Do you have a solution for this exercise?
Super 👍
Accessor and mutator method sollunga
Mam first u said for abstract u can't create object but after very mins u create array object for abstraction mam.so my question if array means i create for abstraction?? confuse mam
No no. I have mentioned in the video. on left side of = you can create a reference of abstract class. But on right side you cannot create abstract object with the "new" keyword. Observe carefully.
@@LogicFirstTamil mam thanks a lot
mam can you saggest some best book in c++ and java
Effective Modern C++
by Scott Meyers, for java - core java by Horstmann
Thank you mam
Hii akka 😊😊 akka nenga nala solli tharinga akka enaku oru help akka na ippo second year akka Na BTech IT group akka enaku Java solli Kudukiringala akka plz 🙏
i dont take classes. u can easily learn from youtube itself
Do you have a solution for this exercise?
Akka ipo abstract cls ku Object create panna mudiyathuna athula iruka concrete method na epdi call panrathu....
sub class muliyama call pannum
I wanna ur example code !
Interface...along with abstract class sollunga mam.. Please
Will upload
@@LogicFirstTamilmam JDBC um teach pannuvinga la... Please sollunga please open an insta account as same as utube channel to ask doubts man
@@programmer5688 I will try to give overview not in depth.
And sorry abt insta, i will not be having time to clear all doubts. Hope you understand
@@LogicFirstTamil ok mam
niceeee
sis junit ku video poturndhingana link anapunga sis
No i havent
Mam please upload source code, it will help us to note
chk github logicfirsttamil
✌✌
Mam PHP solli thanga
i dont know PHP . Sorry
PHP padikadhinga bro... Pick languages like Javascript or Python..
@@LogicFirstTamil please teach all dsa concepts with java programs. it will be very useful to us. Your teaching is excellent
@@037_cse_jananir7 I already have DSA playlist. Chk that.
@@LogicFirstTamil okay mam