File list (Check if you may need any files):
Library
.......\.classpath
.......\.project
.......\Addbookfrm.class
.......\Addbookfrm.java
.......\Adduser.class
.......\Adduser.java
.......\BatAdd.class
.......\BatAdd.java
.......\books.txt
.......\Borbookfrm.class
.......\Borbookfrm.java
.......\Borlistbookfrm.class
.......\Borlistbookfrm.java
.......\Database
.......\........\library_Data.MDF
.......\........\library_Log.LDF
.......\Deluser.class
.......\Deluser.java
.......\library.class
.......\Library.jar
.......\library.java
.......\Librarybox.class
.......\Librarybox.java
.......\Loginfrm.class
.......\Loginfrm.java
.......\Mdibookfrm.class
.......\Mdibookfrm.java
.......\Mdiuser.class
.......\Mdiuser.java
.......\MyStringException1.class
.......\NetConn.class
.......\NetConn.java
.......\Returnbookfrm.class
.......\Returnbookfrm.java
.......\Statistics.class
.......\Statistics.java