elijahStar

check this: http://docs.oracle.com/javase/tutorial/collections/interfaces/index.html

i think you shopuld create several classes for your library system, it will be much easier. this is a simple trial code for a library system managing 2 libraries for a town. it might help. public class Book { String title; boolean borrowed; public Book(String bookTitle){ title=bookTitle; borrowed=false; } public …

class string offers method substring(int beginIndex, int endIndex) that highlights the characters within that string. its not much but it might be a good way to start.

JOptionPane.showMessageDialog(null, "error");