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abstraction

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TUSHAR KADAM answered on June 12, 2021 Popularity 10/10 Helpfulness 3/10

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--Abstraction in java-
-process of hiding the implementation details and showing only functionality to the user
-shows only essential things to the user and hides internal details.
-sending sms, type and send messages but dont know internal processing
-focus on what object does instead how it does

--Two ways to achieve abstraction-
-1.Abstract class (0 to 100%)
-2.Interface (100%)

--Abstract class-
-class that declared as abstract.
-have abstract and non-abstract methods
-needs to be extended and implemented.

--imp points about Abstract class-
-cannot be instatiated (Object creation)
-can have constructor and static methods also
-can have final methods, force the subclass not to change the body of the method

--Abstract method-
-abstract type modifier
-sometimes these methods are referred as sub-classer responsibility
-abstract type methodName(parameter_list);
-no method body is present, just have method signature
-abstract class doesn't need to have an abstract method compulsory
-illegal modifier for methods - final-abstract, abstract static, abstract private

-An abstract class can have a data member, abstract method, method body
    (non-abstract method), constructor, and even main() method.
    
eg.-
    abstract class Shape
    {
        abstract void draw();
    }
    
    class Rectangle extends Shape
    {
        void draw()
        {
            System.out.println("drawing rectangle");
        }
    }

Popularity 10/10 Helpfulness 3/10 Language java

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Tags: abstract-class abstraction java

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Contributed on Nov 21 2022

TUSHAR KADAM

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abstraction meaning

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abstraction is when you don't want your parent class to be assigned memory you just want it to act as a blueprint for the childclass.In system verilog you do it my using virtual keyword in front of class while defining it.

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Contributed on Oct 26 2021

Gleaming Giraffe

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abstraction definition

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Dealing with ideas rather than actual events.

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Contributed on Jun 12 2021

QuietHumility

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abstraction

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- Reduce complexity by hiding unnecessary details.
- Hide implementation details and treat it like a black box.
- A driver does not need to know the entire internal sequential 
	process (how engine turns on, how oil pass through etc) of starting 
    a car. He only needs to know that the switch will turn on or turn off 
    the car.

Popularity 9/10 Helpfulness 1/10 Language whatever

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Contributed on Aug 05 2023

Innocent Iguana

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