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Bijoy Saha answered on May 28, 2021 Popularity 10/10 Helpfulness 2/10

answer abstract classes,

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Uses of Abstract Classes:-
Java Abstract class can implement interfaces without even providing
the implementation of interface methods. Java Abstract class is used to provide
common method implementation to all the subclasses or to provide default
implementation. We can run abstract class in java like any other class if it
has main() method.

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Contributed on Sep 18 2022

Bijoy Saha

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abstract class

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Uses of Abstract Classes

Java Abstract class can implement interfaces without even providing the implementation of interface methods. Java Abstract class is used to provide common method implementation to all the subclasses or to provide default implementation. We can run abstract class in java like any other class if it has main() method.

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Contributed on Mar 09 2022

Real Ratel

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abstract class

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Abstract class is used in defining a common super
class while writing Page Object Model layer of the
framework. We usually create an abstract class named
BasePage to have all common members for every page written
in this class example getPageTitle().
Then each Page class (HomePage, LoginPage, DashboardPage
etc.) inherit from BasePage.
Sometimes one may need to change the behavior of methods
implemented in superclass. So, subclass has freedom to
override that method where we use polymorphism.
This is how we use Abstract class in real projects.

.In my framework I have created my
BasePage class as super
class of the all page classes. 
I have collected all common elements
and functions into PageBase class and
all other page classes extent PageBase class.
By doing so, I don't have to locate very
common WebElements and it provides
reusability in my framework.
Also
1)Abstract classes cannot be instantiated
2)Abstract class meant to be inherited 
	so can not be final,static and private
2)An abstarct classes contains abstract method,
concrete methods or both.
3)Any class which extends abstarct class must
  override all methods of abstract class
4)An abstarct class can contain either
  0 or more abstract method.

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Contributed on May 28 2021

Ozzzy

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what is abstract class

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An abstract class is a common class that has attributes and methods.
and it has at least one abstract method, it can also contain normal methods.
This class cannot be instantiated, it can only be inherited,
that is, it cannot be used to create an object.

Una clase abstracta es una clase común que posee atributos y métodos,
y tiene como mínimo un método abstracto, además puede contener métodos normales.
Esta clase no puede ser instanciada, solo puede heredarse,
o sea no se puede usar para crear un objeto.

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Contributed on Oct 26 2022

Daniel Benítez

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what is abstract class with example

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<?php
abstract class Cars
{
    abstract function car_details();
}
class Maruti extends Cars
{
    function car_details()
    {
        echo "Maruti Details";
    }
}
class Honda extends Cars
{
    function car_details()
    {
        echo "<br>Honda Details<br>";
    }
}

class Scoda extends Cars
{
    function car_details()
    {
        echo "<br>Scoda Details<br>";
    }
}

$obj = new Maruti();
$obj -> car_details();

$obj1 = new Honda();
$obj1 -> car_details();

$obj2 = new Scoda();
$obj2 -> car_details();
?>

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Contributed on Sep 07 2022

@CodeGrepperManu

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abstract classes,

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