Method to show audiobooks sorted by author

1 files changed, 28 insertions, 2 deletions

diff --git a/jMusicHub.java b/jMusicHub.java
index 8feab62..2494925 100644
--- a/jMusicHub.java
+++ b/jMusicHub.java
@@ -1,8 +1,8 @@
 import java.util.*;
 import java.io.*;
 import java.text.*;
+
 /* TO DO :
- * Printing audiobooks sorted by author
  * Generating the javadoc
  * Doing the UML Diagramm
  * Doing the report
@@ -386,6 +386,29 @@ public static void listAlbumsByGenre(){
 		catch (ClassNotFoundException ex) {System.out.println("ClassNotFoundException is caught");}
 	}
 
+public static void listAudioBooksByAuthor(){
+		String filename = "audiobooks";
+		try {
+			// Reading the object from a file
+			FileInputStream file = new FileInputStream(filename);
+			ObjectInputStream in = new ObjectInputStream(file);
+
+			@SuppressWarnings("unchecked")
+			ArrayList<AudioBook> audiobooks = (ArrayList<AudioBook>)in.readObject();
+			in.close();
+			file.close();
+
+			Collections.sort(audiobooks, Comparator.comparing(AudioBook::getAuthor));
+
+			System.out.println("\nSaved "+filename+", sorted by name :\n");
+			for (AudioBook b : audiobooks ){
+				System.out.println(b);
+			}
+		}
+		catch (IOException ex) {System.out.println(filename+ " file missing.");}
+		catch (ClassNotFoundException ex) {System.out.println("ClassNotFoundException is caught");}
+	}
+
 /**<h2>extract</h2>
  * Extract is used to print the content of the files and put them in the ArrayList used to add elements.
  * @param String filename
@@ -578,7 +601,7 @@ public static void listAlbumsByGenre(){
 			switch(userInput) {
 
 				case "h" : //page help
-					System.out.printf("c: add a new song\na: add a new album\n+: add an existing song to an album\nl: add a new audiobook\n\np: create a new playlist from existing songs and audiobooks\n-: delete a playlist\n\ns: save playlists, albums, songs and audiobooks into the concerned files\n\nS: List all your saved songs\nB: List all your saved audiobooks\nA: List all your saved albums\nP: List all your saved playlists\n\nPS: Print playlists sorted by their name\nPC: Print the content of a playlist\nAD: Print albums sorted by their date of release\nAG: Print albums sorted by their genre\nAC: Print the content of an album\n\nh: print this help screen\nq: quit the program\n");
+					System.out.printf("c: add a new song\na: add a new album\n+: add an existing song to an album\nl: add a new audiobook\n\np: create a new playlist from existing songs and audiobooks\n-: delete a playlist\n\ns: save playlists, albums, songs and audiobooks into the concerned files\n\nS: List all your saved songs\nB: List all your saved audiobooks\nA: List all your saved albums\nP: List all your saved playlists\n\nPS: Print playlists sorted by their name\nPC: Print the content of a playlist\nAD: Print albums sorted by their date of release\nAG: Print albums sorted by their genre\nAC: Print the content of an album\nBA: Print audiobooks sorted by their author's name\n\nh: print this help screen\nq: quit the program\n");
 					break;
 
 				case "q" : //quit
@@ -717,6 +740,9 @@ public static void listAlbumsByGenre(){
 				case "AC": //display content of a chosen album
 					contentOfAlbum(albums);
 					break;
+				case "BA": //display audiobooks sorted by authors
+					listAudioBooksByAuthor();
+					break;
 				default :
 					System.out.println("Unknown command. Type h for help.");
 			}