public class Book implements Serializable{
    private String title;
    private String author;
    private String publisher;
    private String isbn;
    private java.util.Date publicationDate;
    private String category;
 
    //  TODO:   create getters and setters - use your IDE
 
}
 
//  In another class - remember each class should be in a different file
 
public class Controller {
 
    public static void insert(Book book) {
        //  Create a file writer to read/write from an existing file
        //  String line = book.getTitle() + ", " + book.getAuthor() + "...";
        //  writer.append(line +"\n");  //  depending on how your writer is setup
    }
 
    public static Book search(String title) {
        //  Create file reader - you can use the one above if you have extracted it to a method
        //  List<Book> books = new ArrayList<Book>();
        //  while (reader.hasMoreLines()){  // this is not real code so don't just copy and paste this you will have to google some of this stuff
               //  tokenize line create new Book from this line - use StringTokenizer()
         }
         for (Book book : books) {
             if (book.getTitle().equals(title)
                return book;
         }
         return null;
    }
 
    //  Your delete will use a similar algorithm to the search - now you can just clean your code up, e.g. extract method for reader - or to load all books from a file into an array.