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.
You mean, how the Java Virtual Machine (JVM) interprets and/or compiles the class file into a running program? Head over to java.sun.com and search for "JVM"; that will bring up some articles and links that will get you started. If you are REALLY interested in the JVM, you might even study the JVM specification (also on java.sun.com).