package com.dome;

 import java.util.ArrayList;

 public class Database

 {

 //    private ArrayList<CD> listCD=new ArrayList<CD>();

 //    private ArrayList<DVD> listDVD=new ArrayList<DVD>();

     private ArrayList<Iterm> listIterm=new ArrayList<Iterm>();

 //    public void add(CD cd)

 //    {

 //        listCD.add(cd);

 //    }

 //

 //    public void add(DVD dvd)

 //    {

 //        listDVD.add(dvd);

 //    }

     public void add(Iterm iterm)

     {

         listIterm.add(iterm);

     }

     public void list()

     {

 //        for (CD cd : listCD)

 //        {

 //            cd.print();

 //        }

 //        for (DVD dvd : listDVD)

 //        {

 //            dvd.print();

 //        }

         for (Iterm iterm : listIterm)

         {

             iterm.print();

         }

     }

     public static void main(String[] args)

     {

         // TODO Auto-generated method stub

 //        Database db=new Database();

 //        db.add(new CD("abc", "abc", 4, 60, "..."));

 //        db.add(new CD("def", "def", 4, 60, "..."));

 //        db.add(new DVD("xxx","xxx",120,"..."));

 //        db.list();

         Iterm i=new Iterm("a", 3, false, "..");

         i.print();

     }

 }

package com.dome;

public class Iterm

{

    private String title;

    private int playingTime;

    private  boolean gotIt = false;

    private String comment;

    public Iterm(String title, int playingTime, boolean gotIt, String comment)

    {

        super();

        this.title = title;

        this.playingTime = playingTime;

        this.gotIt = gotIt;

        this.comment = comment;

    }

    protected void print()

    {

        // TODO Auto-generated method stub

        System.out.print(title);

    }

}

 package com.dome;

 public class CD extends Iterm

 {

     private String artist;

     private int numofTracks;

     public CD(String title, String artist, int numofTracks, int playingTime, String comment)

     {

         super(title,playingTime,false,comment);

 //        this.title = title;

         this.artist = artist;

         this.numofTracks = numofTracks;

     }

     public static void main(String[] args)

     {

         // TODO Auto-generated method stub

     }

     public void print()

     {

         // TODO Auto-generated method stub

         System.out.print("CD:");

         super.print();

         System.out.println(":"+artist);

     }

 }

 package com.dome;

 public class DVD extends Iterm

 {

     private String director;

     public DVD(String title, String director, int playingTime, String comment)

     {

         super(title, playingTime, false, comment);

         this.director = director;

     }

     public static void main(String[] args)

     {

         // TODO Auto-generated method stub

     }

     public void print()

     {

         // TODO Auto-generated method stub

         System.out.print("CD:");

         super.print();

         System.out.print(":"+director);

     }

 }