Bug fixes -

1. [PE-D][Tester F] Inproper Exception Handling nus-cs2113-AY2324S2#133
2. [PE-D][Tester B] Redundant output in the label command nus-cs2113-AY2324S2#112

Enhanced exception handling to capture the different wrong input scenarios

src/main/java/seedu/bookbuddy/bookdetailsmodifier/BookLabel.java

@@ -1,9 +1,9 @@
 package seedu.bookbuddy.bookdetailsmodifier;
 
+import seedu.bookbuddy.Ui;
 import seedu.bookbuddy.book.Label;
 import seedu.bookbuddy.book.Title;
 import seedu.bookbuddy.booklist.BookList;
-import seedu.bookbuddy.Ui;
 
 public class BookLabel {
 
@@ -15,11 +15,6 @@ public class BookLabel {
      * @throws IndexOutOfBoundsException if the index is out of range.
      */
     public static void setBookLabelByIndex(int index, String label, BookList books) throws IndexOutOfBoundsException {
-        // Check for valid index
-        if (index < 0 || index > books.getSize()) {
-            throw new IndexOutOfBoundsException("Invalid book index. Please enter a valid index. nows");
-        }
-
         // Set the label for the book at the specified index
         Label.setLabel(books.getBook(index), label);
         String title = Title.getTitle(books.getBook(index));

src/main/java/seedu/bookbuddy/booklist/BookList.java

@@ -45,7 +45,7 @@ public int getSize(){
      * @param index The index of the book to retrieve.
      * @return The Book at the specified index.
      */
-    public BookMain getBook(int index) throws BookNotFoundException{
+    public BookMain getBook(int index) throws BookNotFoundException {
         if (index < 0 || index > books.size()) {
             throw new BookNotFoundException("Book index out of range.");
         }

src/main/java/seedu/bookbuddy/parser/parsercommands/ParserGenre.java

@@ -21,7 +21,7 @@ static void parseSetGenre(BookList books, String[] inputArray) throws IOExceptio
         try {
             index = Integer.parseInt(parts[0]); // The first part should be the index
         } catch (NumberFormatException e) {
-            System.out.println("Invalid book index. Please enter a valid numeric index.");
+            System.out.println("Invalid book index format. Please enter a valid numeric index.");
             return;
         }
 

src/main/java/seedu/bookbuddy/parser/parsercommands/ParserLabel.java

@@ -1,25 +1,33 @@
 package seedu.bookbuddy.parser.parsercommands;
 
-import seedu.bookbuddy.booklist.BookList;
 import seedu.bookbuddy.bookdetailsmodifier.BookLabel;
+import seedu.bookbuddy.booklist.BookList;
 import seedu.bookbuddy.parser.parservalidation.Exceptions;
 
 public class ParserLabel {
     static void parseSetLabel(BookList books, String[] inputArray) {
-        int index;
+        int index = -1;
         assert inputArray.length == 2 : "Command requires additional arguments";
         Exceptions.validateCommandArguments(inputArray,2, "The Label " +
                 "Command requires a book index and label");
-        String[] labelMessageParts = inputArray[1].split(" ", 2);
+        String[] labelMessageParts = inputArray[1].trim().split(" ", 2);
         // Split the message into index and label message
         assert labelMessageParts.length == 2 : "Command requires an index and a label message";
+        try {
+                index = Integer.parseInt(labelMessageParts[0].trim());
+                if (index < 0 || index > books.getSize()) {
+                    throw new IndexOutOfBoundsException("Invalid book index (out of range). Please enter a valid index.");
+                }
+                assert index > 0 : "Index should be non-negative";
+        } catch (NumberFormatException e) {
+            System.out.println(labelMessageParts[0] + " is not a valid index format.");
+        } catch (IndexOutOfBoundsException e) {
+            System.out.println(e.getMessage());
+        }
         Exceptions.validateCommandArguments(labelMessageParts, 2, "You " +
                 "need to have a label message");
-        index = Integer.parseInt(labelMessageParts[0]);
-        assert index > 0 : "Index should be non-negative";
-        String label = labelMessageParts[1];
+        String label = labelMessageParts[1].trim();
         BookLabel.setBookLabelByIndex(index, label, books);
-        //test
     }
 
     public static void executeParseSetLabel (BookList books, String[] inputArray) {