Just dropping a line to say howdy, and thanks for this site. I'm just starting out on Java, with my Head First Java book. (Trying to get Linux and VMware installed before getting into the thick of Java.) Been programming for years in structured languages. Looking forward to getting immersed (sp?) in Java. Thanks in advance for your help, as I'm sure I'll have plenty of questions, as I ponder the difference between JRE, JVM, JAR, J2SE.