Question

A video store is made up of movies (and lots of other stuff too - but let's keep it simple) - so start by defining a Movie class, then define the VideoStore class and finally a test for it all.

Movie Class:

Instance fields:

• title (String)

• star (String)

• isCheckedOut (boolean)

• numTimesCheckedOut (int)

Methods:

• public String getTitle()

  • Returns title of movie

• public String getStar()

  • Returns star of the movie

• public int getNumTimesCheckedOut()

  • Returns number of times movie has been checked out

• public boolean isItCheckedOut()

  • Returns whether or not movie is currently checked out

• public void checkMovieIn()

  • Checks movie in by setting isCheckedOut to false

• public void checkMovieOut()

  • Checks movie out by setting isCheckedOut to true and increases numTimesCheckedOut

VideoStore Class:

Instance fields:

• movieCollection (array of Movies)

Methods:

• public void addMovie(String title, String star)

  • Creates a new movie with given title and star and adds the movie to the movieCollection array

• public String recommendAMovie(String star)

  • Parameter is the star wanted

  • Returns title of a movie with that star that is not currently checked out

• public void checkOutAMovie(String name)

  • Parameter is the name of the movie

  • Uses Movie class method checkMovieOut()

• public void removeOldMovies()

  • Removes all movies from the movieCollection that have been checked out more than 20 times

• public String getMovieTitles()

  • Returns a String that contains all the titles in the video store

Test:

• Create a VideoStore object

• Add several Movies to the VideoStore

• Check out some movies (at least 1 should be checked out over 20 times - USE A LOOP!)

• Remove the old movies and print out the titles in the video store to check

• Ask user for a star and recommend a movie with that star

In Java Please

Answer 1

Movie.java:

public class Movie {
   String title;
   String star;
   boolean isCheckedout;
   int numTimesCheckedOut=0;
  
   public Movie() {
      
   }
   public String getTitle() {
       return title;
   }
   public String getStar() {
       return star;
   }
   public void setTitle(String title) {
       this.title = title;
   }
   public void setStar(String star) {
       this.star = star;
   }
   public int getNumTimesCheckedOut() {
       return numTimesCheckedOut;
   }
   public boolean isItCheckedOut() {
       return isCheckedout;
   }
   public void checkMovieIn() {
       this.isCheckedout=false;
   }
   public void checkMovieOut() {
       this.isCheckedout=true;
       this.numTimesCheckedOut=this.numTimesCheckedOut+1;
   }
}

VideoStore.java:

import java.util.ArrayList;

public class VideoStore {
   ArrayList<Movie> movieCollection=new ArrayList<Movie>();
   ArrayList<Movie> removeMovie =new ArrayList<Movie>();
   public void addMovie(String title, String star) {
       Movie m =new Movie();
       m.setStar(star);
       m.setTitle(title);  
       movieCollection.add(m);
   }
  
   public String recommendAMovie(String star) {
       for(Movie m:movieCollection) {
           if(m.getStar().equalsIgnoreCase(star) && m.isItCheckedOut()==true) {
               return m.getTitle();
           }
       }
       return "NO movie to be suggested";
   }
   public void checkOutAMovie(String name) {
       for(Movie m:movieCollection) {
           if(m.getTitle().equals(name)) {
          
               m.checkMovieOut();
           }
       }
   }
   public void removeOldMovies() {
       for(Movie m:movieCollection) {
          
           if(m.getNumTimesCheckedOut()>20) {
               System.out.println("removed movie is "+m.getTitle());
               removeMovie.add(m);
           }
       }
       movieCollection.removeAll(removeMovie);
   }
   public String getMovieTitles() {
       String allMovies="";
       for(Movie m:movieCollection) {
           allMovies=allMovies+", "+m.getTitle();
       }
       return allMovies;
       }

   public void getMovieTitlestoCheck() {
       for(Movie m:movieCollection) {
           if(m.isItCheckedOut()==false) {
               System.out.println(m.getTitle());
           }
       }
   }
  
}

Test.java:

import java.util.Scanner;

public class Test {

   public static void main(String[] args) {
       // TODO Auto-generated method stub
       VideoStore vs=new VideoStore();
       vs.addMovie("harry", "Emma");
       vs.addMovie("fast and furious", "vin");
       vs.addMovie("bahubali", "prabhas");
       for(int i=0;i<=25;i++) {
           vs.checkOutAMovie("harry");
       }
      
       vs.removeOldMovies();
       System.out.println("name of the movies to be checked in");
       vs.getMovieTitlestoCheck();
       vs.checkOutAMovie("bahubali");
       Scanner sc=new Scanner(System.in);
       System.out.println("Enter the name of a star");
       String star=sc.next();
       System.out.println("suggested movie is "+vs.recommendAMovie(star));
   }

}