ellehallal

Keybase proof

I hereby claim:

• I am ellehallal on github.
• I am ellehallal (https://keybase.io/ellehallal) on keybase.
• I have a public key ASCiYp6CI2fjmzIr7YqeHzpNl5CZ_lUh2BDIpB8m4NktoQo

To claim this, I am signing this object:

ellehallal

interface Caller {
    fun dial()
    fun makeCall(phoneNumber: Int)
    fun ring() {
        println("RING!")
    }
    fun answerCall()
    fun hangUp()
}

ellehallal

interface Caller {
    fun dial()
    fun makeCall(phoneNumber: Int)
    fun ring()
    fun answerCall()
    fun hangUp()
}

ellehallal

public interface MobilePhone extends Caller {
    void openApp(String appName);
}

ellehallal

public class EnglishGreeter extends Greeter {
    @Override
    public void doHello() {
        System.out.println("Hello!");
    }
    
    @Override
    public void celebrate() {
        System.out.println("WOO HOO!");
    }

ellehallal

public abstract class Greeter {
    public final void greeting() {
        waveHello();
        doHello();
        celebrate();
        waveGoodbye();
        doGoodbye();
    }

    public void waveHello() {

ellehallal

public abstract class Greeter {
    public final void greeting() {
        waveHello();
        doHello();
        waveGoodbye();
        doGoodbye();
    }

    public void waveHello() {
        System.out.println("🙌");

ellehallal

public class FrenchGreeter extends Greeter {
    @Override
    public void doHello() {
        System.out.println("Bonjour!");
    }

    @Override
    public void doGoodbye() {
        System.out.println("Au revoir!");
    }

ellehallal

public class EnglishGreeter extends Greeter {
    @Override
    public void doHello() {
        System.out.println("Hello!");
    }

    @Override
    public void doGoodbye() {
        System.out.println("Goodbye!");
    }

ellehallal

public abstract class Greeter {
    public final void greeting() {
        doHello();
        doGoodbye();
    }

    public abstract void doHello();

    public abstract void doGoodbye();
}