Joshua Bloch. Effective Java™ Programming Language Guide. Addison-Wesley, Boston, MA. ISBN: 0-201-31005-8.
Java 5 Platform API Documentation: [ http://java.sun.com/j2se/1.5.0/docs/api/index.html ]
David Flanagan. Java™ In A Nutshell, Fifth Edition. O’Reilly Media, Inc. Sebastopol, CA. ISBN: 0-596-00773-6.