This is a Java project designed to act as a library's database system. The program takes input in the form of a .txt file to hold a database of books with their titles, status, quality, and ISBN. Students and teachers can borrow books with different parameters, such as the number of books which a certain person can borrow or the time which a book may be checked out.

The program includes text files to be read by the program and certain classes:

• Class Book
• Class Library with methods (addNewBook(), removeOldBook(), borrow(), return() etc.)
• Abstract class Borrower
• Class Student extends abstract class Borrower
• Class Teacher extends abstract class Borrower
• Class LibraryTester as a main class.