1. Abstract Class, Interface, Package

2. Membuat sebuah project yang mengimplementasikan
interface dan abstract class, dengan rincian sbb
Abstract Class Animal
Interface Flyer
Interface Speaker
Class Dog : extends Animal and implements Speaker
Class Cat : extends Animal and implements Speaker
Class Bird : extends Animal and implements Speaker, Flyer
Class Bat : extends Animal and implements Flyer
Main.java (main class)

3. <<abstract>>
Animal
<<abstract>>
Dog
Cat
Bird
Bat
Interface : Flyer
Interface : Speaker

4. Class Animal
public abstract class Animal { private int age; public void setAge(int newAge) this.age=newAge; } public int getAge() return age; public abstract void eat() ; public abstract void walk();

5. Interface Flyer
public interface Flyer {
public void flying(); }

6. Class Cat
public class Cat extends Animal implements Speaker { String name; public Cat(String newName) this.name=newName; public void eat() { System.out.println(name+" eat fish"); public void walk() { System.out.println(name+" with four leg"); public void speaking() { System.out.println(name+" speaks MIAUW MIAUW");

7. Class Main
public class Main{ public static void main(String[] args) { Cat caty=new Cat("Caty"); caty.setAge(2); System.out.println("Caty's age is "+caty.getAge()+" years "); caty.eat(); caty.speaking(); }

8. Lengkapi pada project di atas
Interface Speaker
Class Dog
Class Bird
Class Bat