Java Tutorial : Java Interface (Evolving Interfaces using extends)

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Java Tutorial : Java Interface (Evolving Interfaces using extends)

Java Tutorial : Java Interface (Evolving Interfaces using extends)

Java Tutorial : Java Interface (Evolving Interfaces using extends)

Java Tutorial : Java Interface (Evolving Interfaces using extends)

DoIt.java

public interface DoIt
{
    void sayHi();
}

DoItPlus.java

public interface DoItPlus extends DoIt
{
    void sayBye();
}

MyClass.java

public class MyClass implements DoItPlus
{

    @Override
    public void sayHi()
    {
        System.out.println("Hi");

    }

    @Override
    public void sayBye()
    {
        System.out.println("Bye");
        
    }

}

InterfaceTest.java

public class InterfaceTest
{

    public static void main(String[] args)
    {
        DoItPlus doItPlusRef = new MyClass();
        doItPlusRef.sayHi();
        doItPlusRef.sayBye();
    }

}

Output

Hi
Bye

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

Github Link:
https://github.com/ramram43210/Java/tree/master/BasicJava/InterfaceDemo-EvolvingInterfaces-extends-App

Bitbucket Link:
https://bitbucket.org/ramram43210/java/src/fa67e02bcd9efeae1c2ea3019677c5252e4db5f7/BasicJava/InterfaceDemo-EvolvingInterfaces-extends-App/?at=master

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