Hi Mohammad, for utils link regarding study materials I recommend reading the FAQ page http://faq.javaranch.com/java/ScjdFaq B&S comes from Bodgitt and Scarper and is one version of the SCJD project specification. You will notice also that some other people have some other specifications related to the UrlyBird project. Greetings, Liviu
Oracle Certified Master Java SE6 Developer(SCJD),
OCE JEE 6 JSP and Servlets Developer,
Java EE6 Java Server Faces Developer.