Chapter 10 practice set

 package com.company;

//Problem 6
interface TvRemote{
    void changeChannel();
    void Close();
    }
    interface smartTvRemote extends TvRemote{
    void checkTime();
    void mood();
    }
//    Problem 7
class tv implements TvRemote{
  public void changeChannel(){
        System.out.println("Changing channel");
    }
    public void Close(){
        System.out.println("Closing Tv");
    }
}
//problem 4
 abstract class TelePhone{
     abstract void lift();
    abstract void ring();
    abstract void disconnect();
}
class smartTelePhone extends TelePhone{
    public void lift(){
        System.out.println("Lift the smartPhone");
     }
    public void ring(){
        System.out.println("SmartPhone is ringing");
    }
   public void disconnect(){
       System.out.println("Disconnecting");
   }
}
//    Problem 3
    class monkey{
      public void jump(){
            System.out.println("Jumping");
        }
        public void bite(){
            System.out.println("Bite kr sakta hai!");
        }
}
interface basicAnimal{
        abstract void eat();
        abstract void sleep();
}
class Human extends monkey implements basicAnimal{
   public void eat(){
         System.out.println("We can eat");
    }
   public void sleep(){
       System.out.println("We can sleep");
   }
   public void jump(){
       System.out.println("Bahut badhiya");
   }
}
//    Problem 1
abstract class pen{
    public void define(){
        System.out.println("Hello I am pen");
    }
 abstract void write();
 abstract void refill();
}
//Problem 2
class fountainPen extends pen{
  public void write(){
        System.out.println("I can write");
    }
   public void refill(){
        System.out.println("Please refill me");
    }
    public void changeNib(){
        System.out.println("Oye hello!! change my nib");
    }
}

public class CWH_60_Chapter11_ps {
    public static void main(String[] args) {
fountainPen obj= new fountainPen();
//Problem 2
    obj.changeNib();
    obj.refill();
    obj.write();
//    Problem 3
        Human rohan= new Human();
        rohan.eat();
        rohan.sleep();
        rohan.jump();
//        Problem 5
        monkey ref=new Human();
        ref.bite();
        ref.jump();
//        ref.eat();
//        Problem 4
        TelePhone nokia=new smartTelePhone();
        nokia.disconnect();
        nokia.lift();
        nokia.ring();

        tv refe= new tv();
        refe.changeChannel();
        refe.Close();
    }
}