File list (Check if you may need any files):
library
.......\.classpath
.......\.project
.......\add$1.class
.......\add$2.class
.......\add.class
.......\add.java
.......\book$1.class
.......\book.class
.......\book.java
.......\borrow$1.class
.......\borrow.class
.......\borrow.java
.......\denglu$1.class
.......\denglu$2.class
.......\denglu.class
.......\denglu.java
.......\library.ldb
.......\library.mdb
.......\main$1.class
.......\main$2.class
.......\main$3.class
.......\main$4.class
.......\main.class
.......\main.java