JVM LastModified: Wednesday, September 18, 2002
Acronym for Java Virtual Machine. An abstract computing machine, or virtual machine, JVM is a platform-independent execution environment that converts Java bytecode into machine language and executes it. Most programming languages compile source code directly into machine code that is designed to run on a specific microprocessor architecture or operating system, such as Windows or UNIX. A JVM -- a machine within a machine -- mimics a real Java processor, enabling Java bytecode to be executed as actions or operating system calls on any processor regardless of the operating system. For example, establishing a socket connection from a workstation to a remote machine involves an operating system call. Since different operating systems handle sockets in different ways, the JVM translates the programming code so that the two machines that may be on different platforms are able to connect. JVMs are not the only virtual machines being used today.
Inside Java: The Java Virtual Machine This article from javacoffeebreak.com explains with diagrams a simple version of the way a JVM works. The Java Virtual Machine Specification An online book from Sun examining the specifics of the Java Virtual Machine. Under the Hood: The Lean, Mean Virtual Machine An introduction to the basic structure and functionality of the Java Virtual Machine .	related categories: Operating Systems Programming Programming Languages related terms: J2EE Java Jini JIT JNI operating environment virtual virtual machine Shopping JVM Products Compare Products,Prices and Stores Shop by Category: Microwave Ovens 12 Model Matches Musical Instruments 4 Store Offers