This week's book giveaway is in the OCAJP 8 forum. We're giving away four copies of OCA Java SE 8 Programmer I Study Guide and have Edward Finegan & Robert Liguori on-line! See this thread for details.
ok firstly if you want you use LDAP in your application, get the SDK either from Sun / Novell .... / MS / OpenLDAP. SDK is generally available in multiple platforms and languages. LDAP is used for more than authentication now a days, can also be used as the configuration store ... etc.