Question

Write a Java program that:

1. Decide on a list of n favorites (songs, bands, movies, video games, etc.) (between 5 and 10 favorites is fine).

2. Write a program that lists the n favorites but with a small twist.

3. Read in a file of n favorites (sample file in the Resources/Sample File area)...Please make your own.

4. Print a list of all n favorites to the user (so they know what is coming)

5. Ask if the user wishes to add or delete elements to/from the list.

- If they wish to add an element, read in the element from the console

- If they wish to remove an element, prompt for the item to be removed.

6. Print the next favorite from the list and for each favorite....

- 1st prompt for the user’s ranking of the favorite

- 2nd prompt for the user’s comments (for this round)

7. Slot the favorite into the final list using the supplied flowchart

8. Inform the user of the placement of the latest element.

9. After all n favorites, print the list to the screen

10. When complete, write back to the input file, adding the new comments to the previous rounds of comments. The file should be able to be consumed by your program for the next round of play.

Answer 1

abc

Solution:

code:

package abc;

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

public class Favourite {

public static void main(String[] args) {
//normal arrays are of fixed length
//ArrayLists are dynamic
//for list from file
ArrayList<String> originalMovieList = new ArrayList<>();
// for adding and removing movies
ArrayList<String> movies = new ArrayList<>();
//for ratings
ArrayList<String> ratings = new ArrayList<>();
// for comments
ArrayList<String> comments = new ArrayList<>();
//stores the user choice
int choice = 0;
// to read input from console
Scanner keyboard = new Scanner(System.in);
try {
// to read from file
Scanner fileReader = new Scanner(new File("favourites.txt"));
//reading all data from file
while(fileReader.hasNextLine())
{
String movieDetail = fileReader.nextLine();
originalMovieList.add(movieDetail);
String tokens[] = movieDetail.split("\\|");
movies.add(tokens[0]);
ratings.add(tokens[1]);
comments.add(tokens[2]);
}
fileReader.close();
//printing all the favorites to the screen
System.out.println("--------List of favorites--------\n");
for(String string: movies)
System.out.println(string);
String fav;
while(true)
{
System.out.print("\n1. Add a favorite\n2. Remove a favorite\n3. Move to Adding rating and comments\nEnter your choice: ");
choice = Integer.valueOf(keyboard.nextLine());
if(choice != 1 && choice != 2)
break;
System.out.print("\nEnter a favorite: ");
fav = keyboard.nextLine();
if(choice == 1)
{
while(fav.length() <20)
fav+= " ";
movies.add(fav);
ratings.add(" ");
comments.add(" ");
originalMovieList.add(fav);
System.out.println("Added favorite: " + fav);
}
else if(choice ==2)
{
for(int i=0; i<movies.size(); i++)
{
if(movies.get(i).contains(fav))
{
movies.remove(i);
originalMovieList.remove(i);
ratings.remove(i);
comments.remove(i);
originalMovieList.remove(i);
}
}
}
}
for(int i=0; i<movies.size(); i++)
{
System.out.println("Favorite: " + movies.get(i));
System.out.print("Enter your rating: ");
String rating = keyboard.nextLine();
while(rating.length()<5)
rating += " ";
System.out.print("Enter your comment: ");
String comment = keyboard.nextLine();
ratings.set(i, " " + rating);
comments.set(i, comments.get(i) +"; " + comment);
originalMovieList.set(i, movies.get(i) + "|" + ratings.get(i) + "|" + comments.get(i));
}
PrintWriter writer = new PrintWriter(new File("favorites.txt"));
System.out.println("\nFinal favorite list\n");
for(String string: originalMovieList)
{
writer.write(string + "\n");
System.out.println(string);
}
writer.close();
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}

}