Java Tutorial : Java abstract class(Bike)

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Bike.java

public abstract class Bike
{
    Bike()
    {
        System.out
                .println("abstract class Bike constructor is called.");
    }

    /*
     * If there is any abstract method in a class, that
     * class must be abstract.
     */
    abstract void run();

    void changeGear()
    {
        System.out.println("gear changed");
    }
}

/*
 * If you are extending any abstract class that have
 * abstract method, you must either provide the
 * implementation of the method or make this class abstract.
 */
class Honda extends Bike
{

    public Honda()
    {
        super();
    }

    void run()
    {
        System.out.println("running safely..");
    }
}

AbstractClassTest.java

public class AbstractClassTest
{

    public static void main(String[] args)
    {
        Bike bikeRef = new Honda();
        bikeRef.run();
        bikeRef.changeGear();
    }

}

Output

abstract class Bike constructor is called.
running safely..
gear changed

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

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

Bitbucket Link:
https://bitbucket.org/ramram43210/java/src/616eaf1c2bb4551c34e3415baa3ee3135766bffc/BasicJava/AbstractClassDemo_Bike_App/?at=master

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