JAVA Abstraction in Java | How to use java abstraction in selenium

Java Abstraction:

Abstraction is the process of hiding the execution details and showing the functionality to the user only.
Abstraction lets you pay attention to how the object is doing instead of how it is done.

Real Life Example of Abstraction:

We only know about running a car, but it does not know how it works, and we do not even know the internal functionality of the car.

There are two ways to get an abstraction in Java:

Abstract class (0 to 100% abstraction)

Interface (100% abstraction is received)

Abstract class / method:

An abstract class is a class that has been declared with the keyword abstract.

It can be mixed with implementation or without declared methods.

It needs to be expanded and all abstract methods should be implemented in the child class.

It can not be interpreted to mean that you can not make an object of an abstract class.

Abstract method is a method which has been declared without implementation.

Syntax:

abstract class A{}

1	abstract class A{}

Example of Abstract class & Method:

abstract class Vehical {

      abstract void run();

      void display() {

            System.out.println("Display Method");
      }
}

class BMW extends Vehical {

      public void run() {

            System.out.println("Run method");
      }

      public static void main(String args[]) {

            BMW obj = new BMW();

            obj.run();
      }
}

abstract class Vehical {

abstract void run();

void display() {

System.out.println("Display Method");

}

class BMW extends Vehical {

public void run() {

System.out.println("Run method");

}

public static void main(String args[]) {

BMW obj = new BMW();

obj.run();

}

Interface:

An interface in Java is a template of a class.

This collection of abstract methods means that all methods are abstract methods in the interface.

With abstract methods, an interface can also contain constants, default methods, static methods, and nested types.

The interface in Java is a mechanism to achieve completely abstraction.

It can not be started like an abstract class.

Example:

interface Demo {

      static void display();

      static void run();
}

class TestClass implements Demo {

      public void display() {

            System.out.println("Dispaly Method");
      }

      public void run() {

            System.out.println("Run Method");
      }

      public static void main(String args[]) {

            TestClass obj = new TestClass();

            obj.display();
      }
}

interface Demo {

static void display();

static void run();

}

class TestClass implements Demo {

public void display() {

System.out.println("Dispaly Method");

}

public void run() {

System.out.println("Run Method");

}

public static void main(String args[]) {

TestClass obj = new TestClass();

obj.display();

}

When do you use java abstraction?

When you know that there must be something, but it is not certain how it should look.

Benefits of java Abstraction:

By using abstraction, we can separate things that can be grouped in some other way.