Java Tutorial : When to use Java abstract class and abstract method

Click here to watch in Youtube :
https://www.youtube.com/watch?v=ZRdgrLs-rRo&list=UUhwKlOVR041tngjerWxVccw

Click the below Image to Enlarge

Java Tutorial : When to use Java abstract class and abstract method 

Car.java

abstract class Car
{
    abstract void engine();
}

class HondaCar extends Car
{

    @Override
    void engine()
    {
        System.out.println("Honda Car Engine Implementation...");
        // Honda Car implementation

    }

}

class SwiftCar extends Car
{

    @Override
    void engine()
    {
        System.out.println("Swift Car Engine Implementation...");
        // Swift Car implementation
    }

}

AbstractClassTest.java

public class AbstractClassTest
{

    public static void main(String[] args)
    {
        Car carRef = new HondaCar();
        carRef.engine();
        
        carRef = new SwiftCar();
        carRef.engine();
    }

}

Output

Honda Car Engine Implementation...
Swift Car Engine Implementation...

Click the below link to download the code:
https://sites.google.com/site/javaee4321/java/AbstractClassDemo_when_to_use_App.zip?attredirects=0&d=1

Github Link:
https://github.com/ramram43210/Java/tree/master/BasicJava/AbstractClassDemo_when_to_use_App

Bitbucket Link:
https://bitbucket.org/ramram43210/java/src/d0d6b1dff9f31bbeec3615564d292efcb8f01f3f/BasicJava/AbstractClassDemo_when_to_use_App/?at=master

See also:

All JavaEE Viedos Playlist

All JavaEE Viedos

All JAVA EE Links

Servlets Tutorial

All Design Patterns Links

JDBC Tutorial

Java Collection Framework Tutorial

JAVA Tutorial