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Java virtual machine

   Also found in: Acronyms, Wikipedia, Hutchinson 0.01 sec.

Java Virtual Machine

A Java interpreter. The Java Virtual Machine (JVM) is software that converts the Java intermediate language (bytecode) into machine language and executes it. The original JVM came from the JavaSoft division of Sun. Subsequently, other vendors developed their own; for example, the Microsoft Virtual Machine is Microsoft's Java interpreter. A JVM is incorporated into a Web browser in order to execute Java applets. A JVM is also installed in a Web server to execute server-side Java programs. A JVM can also be installed in a client machine to run stand-alone Java applications. See Java and Java Runtime Environment.

Java virtual machine [¦jäv·ə ‚vər·chə·wəl mə′shēn]
(computer science)
An interpreter that translates Java bytecode into actual machine instructions in real time. Abbreviated JVM.
(language, architecture)Java Virtual Machine - (JVM) A specification for software which interprets Java programs that have been compiled into byte-codes, and usually stored in a ".class" file. The JVM instruction set is stack-oriented, with variable instruction length. Unlike some other instruction sets, the JVM's supports object-oriented programming directly by including instructions for object method invocation (similar to subroutine call in other instruction sets).

The JVM itself is written in C and so can be ported to run on most platforms. It needs thread support and I/O (for dynamic class loading). The Java byte-code is independent of the platform.

There are also some hardware implementations of the JVM.

Specification.

Sun's Java chip.



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