This is code from the CD inside Programming for the Java Virtual Machine by Joshua Engel, pubished 1999 with Addison Wesley, also available here, with additions of my own as I work through the book..

It has many different uses, including in web development, mobile applications, desktop applications, and server-side programming. Java generates a virtual machine (VM) that executes the code ...

The Java virtual machine is a program whose purpose is to execute other programs. It’s a simple idea that also stands as one of our greatest examples of coding kung fu.

Java virtual machines (JVMs) are built from a variety of pieces. One is the Java language. Java bytecodes are the machine code for a JVM, and Java compilers are needed to translate ...

Forgive me for circling repeatedly around this point, but the possibility that the Java Virtual Machine might long outlive the Java language itself is becoming increasingly intriguing to me. More ...

Java’s “write once, run anywhere” principle means a developer can develop Java code on any device and run it on any other Java-enabled system that supports the Java Virtual Machine (JVM).