Java Abstract Classes | Java Course in Tamil | Logic First Tamil

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[_cse_jananir]

Your java playlist is one of the best java tutorial in youtube

[virat_pattt]

Unga voice super aa iruku 😍😍 also explaining slang also just awesome 😎

[singertamil]

your voice so cute and explain slag also very nice and easy to understand very well thank you class mam😍😃

[aravindkumar]

14:20
define panniye aganum nu nammala nga

[spooja]

Please add all the codes in description, it will be easy for us to revise before the interview day

[gowthamselvaraj]

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);
}
}

[vigneshrp]

thank you so explanation is very clear for all the topics.

[kajamoideen]

12:11 line 5 la abstract void ah //committed pannirunga abstract ah remove pannitu verum void method kodukalamay.??

[nimalj]

object names m1 and m, m2, m3, m4 nu kodukama unique names koduthu explain panni innum nalla puriyum

[kannanb]

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?

[_NAGASUBRAMANIANS]

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) {
ArrayList<Common>c = new ArrayList<Common>();
c.add(new Square(4));
c.add(new Triangle(2, 4, 4));
for(Common i:c){
System.out.println(i.area());
}
}
}

[ananthkumark]

Mam Your Teaching is Very easy to learn ....Please do the playlist for DBMS and SQL

[aazhinisenthilkumaran]

Mam can you please add the code in the description or in the pinned comments so that we can revise easily before exam??

[baskarj]

Mam, abstract methodla irukura concrete methods and variablesa eppadi access pandradhu.derived classla Override pannama access panna mudiyuma?

[sivamsivam]

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

[shortboy]

mam can you saggest some best book in c++ and java

[.poorwinsankar.r.k]

Mam..neenga last ah kudukura programs ku ans enga iruku??

[gokulnath]

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

[CARevanthkumar]

package Absract;


abstract class Shape
{
abstract void area(int n);
}

class Square extends Shape
{
void area(int n)
{
+ (n * 4));
}
}

class Triangle extends Shape
{
void area(int n)
{
+ (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);
}

}

}

[uzumakinaruto-yswp]

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();
}
}
}