Java virtual machine
Virtual machine that runs Java programs / From Wikipedia, the free encyclopedia
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A Java virtual machine (JVM) is a virtual machine that enables a computer to run Java programs as well as programs written in other languages that are also compiled to Java bytecode. The JVM is detailed by a specification that formally describes what is required in a JVM implementation. Having a specification ensures interoperability of Java programs across different implementations so that program authors using the Java Development Kit (JDK) need not worry about idiosyncrasies of the underlying hardware platform.
Designer | Sun Microsystems |
---|---|
Bits | 32-bit |
Introduced | 1994 |
Version | 20.0.1[1] |
Type | Stack and register–register |
Encoding | Variable |
Branching | Compare and branch |
Endianness | Big |
Open | Yes |
Registers | |
General-purpose | Per-method operand stack (up to 65535 operands) plus per-method local variables (up to 65535) |
The JVM reference implementation is developed by the OpenJDK project as open source code and includes a JIT compiler called HotSpot. The commercially supported Java releases available from Oracle are based on the OpenJDK runtime. Eclipse OpenJ9 is another open source JVM for OpenJDK.