Main01

package org.ww.lesson1;

import java.util.Scanner;

public class Main04 {

    public static void main(String[] args) {
        new Main04().run(args);
    }

    public void run(String[] args) {
        System.out.println("Hello");

        //        duck = Duck()
        Duck duck = new Duck();
        duck.quack();


    }

    // inner class
    public class Leg {
        public Leg() {
            super();
        }


        void go() {
            System.out.println("going....");
        }
    }

    public class IronLeg extends Leg {
        public IronLeg() {
            super();
        }


        void go() {


        }
    }

    public class Animal {

        Integer weight;

        public Animal(Integer weight) {
            super();
            this.weight = weight;
        }

        public void do_nothing() {
        }
    }

    public interface FlyingAnimal {
        void flying();
    }

    public class Duck extends Animal implements FlyingAnimal {

        public Duck() {
            // has to be the first
            super(2);

            //            super.weight = 0;

        }

        void quack() {
            System.out.println("qua");
        }

        @Override
        public void flying() {
        }
    }
}