jvm is Java virtual machine. It interprets the bytecode and executes your program.
jre is Java runtime environment It is the jvm and Sun's standard Java class libraries and anything else needed to execute existing Java programs but not enough to create or change programs. Compare to sdk=system develpment kit
SCJP 1.4, SCWCD in process
I’ve looked at a lot of different solutions, and in my humble opinion Aspose is the way to go. Here’s the link: http://aspose.com