INHERITANCE

In Java, it is possible to inherit attributes and methods from one class to another. We group the "inheritance concept" into two categories:

1. subclass (child) - the class that inherits from another class
2. superclass (parent) - the class being inherited from

//Class name extance class name{}//

To inherit from a class, use the extends keyword.

In the example below, the Car class (subclass) inherits the attributes and methods from the Vehicle class (superclass):
Today i PRACTICES QUESTIONS work with this questions
Write a program for this questions answers are gitlab account

(https://gitlab.com/arunkumarsiva81/aug25batch.git)

//Single INHERITANCE_

class Shape{

void area()
{
System.out.println("Area of Shape");
}
}

class Circle extends Shape{
void area(){
double radius = 5;
double value = 3.14;
double X = radius*value;
System.out.println("Area of circlr :"+X);

}
}
class Rectangle extends Shape{
void area(){
int length = 4, width = 8;
int result = length*width;
System.out.println("Area of Rectangle :"+result);

}
}
class Triangle extends Shape{

void area(){
int base =3, height =8;
int result = base*height;
System.out.println("Area of Triangle :"+result);
}
}

public class Main {
public static void main(String[] args) {
Circle obj1 = new Circle();
Rectangle obj2 = new Rectangle();
Triangle obj3 = new Triangle();
obj1.area();
obj2.area();
obj3.area();
}

}
//*MULTI LEVEL INHERITANCE *

Bank Example
Class Bank → method bankDetails().
Class Branch (extends Bank) → method branchDetails().
Class Customer (extends Branch) → method customerDetails().
Test multi-level access with a Customer object.

package Arun;

class Bank{
void bankName(){
String BankName ="State bank of india";
String address ="xxxxxxxx";
System.out.println("name of the bank :"+BankName);
System.out.println("main branch address :"+address);
}
}
class Branch extends Bank {
void BranchName(){
String branch = "chennaibranch";
String branchadd = "vellachary";
int contacts = 0001200000;
int ifsccode = 004500;
System.out.println("This is branch name"+branch);
System.out.println("This is address"+branchadd);
System.out.println("contacts number"+contacts);
System.out.println("branch ifsc code"+ifsccode);
}
}
class Customer extends Branch {
void customerName (){
String name = "Arun kumar";
int accNo = 0000054000;
int mobileNo = 000545000;
System.out.println("customer name"+name);
System.out.println("Account number"+accNo);
System.out.println("mobileNo :"+mobileNo);
}

}
public class Multilevel{
public static void main (String[] args){
Customer details = new Customer();
details.bankName();
details.BranchName();
details.customerName();

}

}

//HIERAICAL INHERITANCE

1️⃣ Shape Example 🔺⚪⬛
Create a base class Shape with a method area().
Create subclasses:
Circle (extends Shape) → override area() to calculate circle area.
Rectangle (extends Shape) → override area() to calculate rectangle area.
Triangle (extends Shape) → override area() to calculate triangle area.
In main(), create objects of all three classes and call their area() methods()

    class Shape{

    void area()
{
    System.out.println("Area of Shape");
}
}

    class Circle extends Shape{
    void area(){
double radius = 5;
double value = 3.14;
double X = radius*value;
System.out.println("Area of circlr :"+X);

}
    }
    class Rectangle extends Shape{
    void area(){
int length = 4, width = 8;
int result = length*width;
System.out.println("Area of Rectangle :"+result);

}
}
class Triangle extends Shape{

void area(){
int base =3, height =8;
int result = base*height;
System.out.println("Area of Triangle :"+result);
}
}

    public class Hierarchical {
      public static void main(String[] args) {
    Circle obj1 = new Circle();
    Rectangle obj2 = new Rectangle();
    Triangle obj3 = new Triangle();
    obj1.area();
    obj2.area();
    obj3.area();
}

}