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.
What do you mean by "system classes" - the java.lang.System class? It has extensive javadoc documentation that should answer most questions you may have about its methods. If any particular method has you scratching your head, tell us which one and we'll try to fill in the blanks. [ September 09, 2008: Message edited by: Ulf Dittmer ]