Question

no buffered reader. no try catch statements. java code please.

And using this super class: Medialtemjava a Create the "middle" of the diagram, the DVD and ForeignDVD classes as below: The DVD class will have the following attributes and behaviors: Attributes (in addition to those inherited from Medialtem): • director:String • rating: String • runtime: int (this will represent the number of minutes) Behaviors (methods) • constructors (at least 3): the default, the "overloaded" as we know it, passing in all attributes, the copy constructor getters for the director, runtime and rating • a setter for rating (the rating can be changed) an equals method (check for equality ALL attributes of the DVD and it's parent, the Medialtem • the toString() -- including all attributes (use the toString() from the parent)

Answer 1

// DVD.java

public class DVD extends MediaItem
{
   private String director;
   private String rating;
   private int runtime;
  
   public DVD()
   {
       this("",0,"","",0);
   }
  
   public DVD(String title, int year, String director, String rating, int runtime)
   {
       super(title, year);
       this.director = director;
       this.rating = rating;
       this.runtime = runtime;
   }
  
   public DVD(DVD copy)
   {
       this(copy.getTitle(), copy.getYear(), copy.director, copy.rating, copy.runtime);
   }
  
   public String getDirector()
   {
       return director;
   }
  
   public String getRating()
   {
       return rating;
   }
  
   public int getRuntime()
   {
       return runtime;
   }
  
   public void setRating(String rating)
   {
       this.rating = rating;
   }
  
   public boolean equals(DVD test)
   {
       return super.equals(test) && director.equalsIgnoreCase(test.director)
               && rating.equalsIgnoreCase(test.rating) && runtime == test.runtime;
   }
  
   public String toString()
   {
       return super.toString()+"\nDirector : "+director+"\nRating : "+rating+"\nRuntime : "+runtime+" minutes";
   }
}

//end of DVD.java

// ForeignDVD.java

public class ForeignDVD extends DVD
{
   private String language;
   private boolean hasSubTitles;
  
   public ForeignDVD()
   {
       this("",0,"","",0,"",false);
   }
  
   public ForeignDVD(String title, int year, String director, String rating, int runtime, String language, boolean hasSubTitles)
   {
       super(title, year, director, rating, runtime);
       this.language = language;
       this.hasSubTitles = hasSubTitles;
   }
  
   public ForeignDVD(ForeignDVD copy)
   {
       this(copy.getTitle(), copy.getYear(), copy.getDirector(), copy.getRating(), copy.getRuntime(), copy.language, copy.hasSubTitles);
   }
  
   public String getLanguage()
   {
       return language;
   }
  
   public boolean subTitlesAvailable()
   {
       return hasSubTitles;
   }
  
   public boolean equals(ForeignDVD test)
   {
       return super.equals(test) && language.equalsIgnoreCase(test.language) && hasSubTitles == test.hasSubTitles;
   }
  
   public String toString()
   {
       return super.toString()+"\nLanguage : "+language+"\nHas Subtitles : "+hasSubTitles;
   }
}
//end of ForeignDVD.java

// MediaItemDriver.java

import java.io.File;
import java.io.FileNotFoundException;
import java.util.ArrayList;
import java.util.Scanner;

public class MediaItemDriver {
  
   // method to display menu
   private static void menu()
   {
       System.out.println("1. Display all DVD objects");
       System.out.println("2. Display all Foreign DVD objects");
       System.out.println("3. Display all MediaItem objects");
       System.out.println("4. Calculate and display the total runtime for all DVDs");
       System.out.println("5. Search for items with a specific rating");
       System.out.println("6. Search for item by title");
       System.out.println("7. Search for items that have subtitles");
       System.out.println("8. Display DVD with the longest runtime");
       System.out.println("9. Exit");
   }
  
   // method to display all dvd
   private static void displayAllDVD(ArrayList<MediaItem> items)
   {
       for(int i=0;i<items.size();i++)
       {
           if(items.get(i) instanceof DVD)
           {  
               System.out.println(items.get(i));
               System.out.println();
           }
       }
   }
  
   // method to display all foreign dvd
   private static void displayAllForeignDVD(ArrayList<MediaItem> items)
   {
       for(int i=0;i<items.size();i++)
       {
           if(items.get(i) instanceof ForeignDVD)
           {  
               System.out.println(items.get(i));
               System.out.println();
           }
       }
   }
  
   // method to display all media item
   private static void displayAllMediaItem(ArrayList<MediaItem> items)
   {
       for(int i=0;i<items.size();i++)
       {
          
           System.out.println(items.get(i));
           System.out.println();
          
       }
   }
  
   //method to calculate and display total run time
   private static void displayTotalRuntime(ArrayList<MediaItem> items)
   {
       int totalRuntime = 0;
       for(int i=0;i<items.size();i++)
       {
           if(items.get(i) instanceof DVD)
               totalRuntime += ((DVD)items.get(i)).getRuntime();
       }
      
       System.out.println("Total runtime : "+totalRuntime+" minutes");
   }
  
   // method to search the items by rating
   private static void searchByRating(ArrayList<MediaItem> items, Scanner scan)
   {
       String rating;
       // if more ratings are present,add to the list
       System.out.print("Enter the type of rating(NR/R/PG/PG-13): ");
       rating = scan.nextLine();
      
       for(int i=0;i<items.size();i++)
       {
           if(items.get(i) instanceof DVD)
           {
               if(((DVD)items.get(i)).getRating().equalsIgnoreCase(rating))
               {
                   System.out.println(items.get(i));
                   System.out.println();
               }
           }
       }
   }
  
   // method ot search the items by title
   private static void searchByTitle(ArrayList<MediaItem> items, Scanner scan)
   {
       String title;
       System.out.print("Enter the title: ");
       title = scan.nextLine();
      
       for(int i=0;i<items.size();i++)
       {
           if(items.get(i).getTitle().equalsIgnoreCase(title))
           {
               System.out.println(items.get(i));
               System.out.println();
           }
       }
   }

   // method to display all items that have sub titles
   private static void searchWithSubtitles(ArrayList<MediaItem> items)
   {
       for(int i=0;i<items.size();i++)
       {
           if(items.get(i) instanceof ForeignDVD)
           {
               if(((ForeignDVD)items.get(i)).subTitlesAvailable())
               {
                   System.out.println(items.get(i));
                   System.out.println();
               }
           }
       }
   }
  
   // method to determine and display the dvd with longest runtime
   private static void longestRuntimeDVD(ArrayList<MediaItem> items)
   {
       DVD result = null;
       for(int i=0;i<items.size();i++)
       {
           if(items.get(i) instanceof DVD)
           {
               if(result == null || (((DVD)items.get(i)).getRuntime()) > result.getRuntime())
                   result = (DVD)items.get(i);
           }
       }
      
       if(result == null)
           System.out.println("No DVD in the list");
       else
           System.out.println(result);
      
   }
   public static void main(String[] args) throws FileNotFoundException {

       ArrayList<MediaItem> items = new ArrayList<MediaItem>();
       Scanner fileScan = new Scanner(new File("dvdData.txt"));
       String line;
       MediaItem item;
       // read till the end of file
       while(fileScan.hasNextLine())
       {
           // Assuming delimiter in file is comma(,)
           line = fileScan.nextLine();
           String fields[] = line.split(",");
          
           if(fields[0].equalsIgnoreCase("d"))
           {
               item = new DVD(fields[1].trim(),Integer.parseInt(fields[2].trim()), fields[3].trim(), fields[4].trim(), Integer.parseInt(fields[5].trim()));
           }else if(fields[0].equalsIgnoreCase("fd"))
           {
               item = new ForeignDVD(fields[1].trim(),Integer.parseInt(fields[2].trim()), fields[3].trim(),
                           fields[4].trim(), Integer.parseInt(fields[5].trim()), fields[6].trim(), Boolean.parseBoolean(fields[7].trim()));
           }else
           {
               item = new MediaItem(fields[1].trim(), Integer.parseInt(fields[1].trim()));
           }
          
           items.add(item);
       }
      
       fileScan.close();
      
       int choice;
      
       Scanner scan = new Scanner(System.in);
       // loop that continues till the user wants
       do
       {
           menu();
           // input of choice
           System.out.print("Enter your choice: ");
           choice = scan.nextInt();
           scan.nextLine();
          
           //based on input perform the operation
           if(choice == 1)
           {
               displayAllDVD(items);
           }
           else if(choice == 2)
           {
               displayAllForeignDVD(items);
           }
           else if(choice == 3)
           {
               displayAllMediaItem(items);
           }
           else if(choice == 4)
           {
               displayTotalRuntime(items);
           }
           else if(choice == 5)
           {
               searchByRating(items, scan);
           }
           else if(choice == 6)
           {
               searchByTitle(items, scan);
           }
           else if(choice == 7)
           {
               searchWithSubtitles(items);
              
           }
           else if(choice == 8)
           {
               longestRuntimeDVD(items);
           }
           else if(choice != 9)
           {
               System.out.println("Invalid choice");
           }
           System.out.println();
       }while(choice != 9);

   }

}
//end of MediaItemDriver.java

Output:

Input file:

1 2 3 d, To The Stars, 2019, Martha Stevens, NR, 109 d, Ex Machina, 2014, Alex Garland, R, 108 fd, A Separation, 2011, Asghar Farhadi, PG-13, 123, Persian, TRUE 5 6 fd, Force Majeure, 2014, Ruben Ostlund, R, 120, French, TRUE fd, The Lives of Others, 2006, Florian Graf Henckel von Donnersmarck, R, 137, German, FALSE d, The Sixth Sense, 1999,M. Night Shyamalan, PG-13, 107 fd, Bicycle Thieves, 1948, Vittorio De Sica, NR, 93, Italian, FALSE fd, The Sea Inside, 2004, Alejandro Amenabar, PG-13, 126, Spanish, TRUE 8 9

Output:

1. Display all DVD objects 2. Display all Foreign DVD objects 3. Display all MediaItem objects 4. Calculate and display the total runtime for all DVDs 5. Search for items with a specific rating 6. Search for item by title 7. Search for items that have subtitles 8. Display DVD with the longest runtime 9. Exit Enter your choice: 3 Title : To The Stars Year: 2019 Director : Martha Stevens Rating : NR Runtime: 109 minutes Title : Ex Machina Year : 2014 Director: Alex Garland Rating : R Runtime: 108 minutes Title : A Separation Year : 2011 Director: Asghar Farhadi Rating: PG-13 Runtime: 123 minutes Language : Persian Has Subtitles : true Title : Dead Poets Society Year : 1989 Director: Peter Weir Rating: PG Runtime: 128 minutes Title : Force Majeure Year : 2014 Director : Ruben Ostlund Rating : R Runtime: 120 minutes Language : French

Title : The Lives of Others Year : 2006 Director: Florian Graf Henckel von Donnersmarck Rating : R Runtime : 137 minutes Language : German Has Subtitles : false Title : The Sixth Sense Year : 1999 Director : M. Night Shyamalan Rating: PG-13 Runtime : 107 minutes Title : Bicycle Thieves Year: 1948 Rating : NR Runtime : 93 minutes Language: Italian Has Subtitles : false Title : The Sea Inside Year : 2004 Director : Alejandro Amenabar Rating: PG-13 Runtime : 126 minutes Language : Spanish Has Subtitles : true Title : Insomnia Year : 2002 Director : Christopher Nolan Rating : R Runtime : 118 minutes 1. Display all DVD objects 2. Display all Foreign DVD objects 3. Display all MediaItem objects

Enter your choice: 7 Title : A Separation Year : 2011 Director : Asghar Farhadi Rating: PG-13 Runtime: 123 minutes Language : Persian Has Subtitles : true Title : Force Majeure Director : Ruben Ostlund Rating : R Runtime: 120 minutes Language : French Title : The Sea Inside Year : 2004 Director : Alejandro Amenabar Rating: PG-13 Runtime: 126 minutes Has Subtitles : true

Title : The Sea Inside Year : 2004 Director : Alejandro Amenabar Rating: PG-13 Runtime : 126 minutes Language : Spanish Has Subtitles : true 1. Display all DVD objects 2. Display all Foreign DVD objects 3. Display all MediaItem objects 4. Calculate and display the total runtime for all DVDs 5. Search for items with a specific rating 6. Search for item by title 7. Search for items that have subtitles 8. Display DVD with the longest runtime 9. Exit Enter your choice: 8 Title : The Lives of Others Year: 2006 Director: Florian Graf Henckel von Donnersmarck Runtime : 137 minutes Language : German Has Subtitles : false 1. Display all DVD objects 2. Display all Foreign DVD objects 3. Display all MediaItem objects 4. Calculate and display the total runtime for all DVDs 5. Search for items with a specific rating 6. Search for item by title 7. Search for items that have subtitles 9. Exit Enter your choice: 9