/**

* Interface Example One

* */

public class Main {

public static void main(String[] args) {

// new Animal(); // Not Allowed.

Animal animal = new Dog();

animal.eat();

animal.run();

}

}

interface Animal {

public static final float pi = 3.14f;

abstract public void run();

abstract public void eat();

}

class Dog implements Animal {

@Override

public void run() {

System.out.println("Dog is running");

}

@Override

public void eat() {

System.out.println("Dog is eating");

}

}

/*

* Rules of Interface

* * You cannot create object of interface. They are just a blueprint of a class.

* * Use implements keyword

* * They can only contain abstract methods.

*

* 1. For Methods

* * They are public and abstract

* * No method body. You cannot write code within your method.

*

* 2. For Variables

* * Avoid using field variables

* * But when used they are constants. Their values cannot be changed once defined.

* * They are public, static and final

*

* */