List of Java virtual machines

Source: Wikipedia, the free encyclopedia.

This article provides non-exhaustive lists of

64-bit
varieties.

The primary reference Java VM implementation is HotSpot, produced by Oracle Corporation and many other big and medium-sized companies (e.g. IBM, Redhat, Microsoft, Azul, SAP).

Free and open source implementations

Active

  • Codename One – uses the open source ParparVM
  • Eclipse OpenJ9
    – open-source from IBM J9, for AIX, Linux (x86, Power, and Z), macOS, Windows, MVS, OS/400, Pocket PC, z/OS.
  • GraalVM – is based on HotSpot/OpenJDK, it has a polyglot feature, to transparently mix and match supported languages.
  • HotSpot – the open-source Java VM implementation by Oracle.
  • Jikes RVM (Jikes Research Virtual Machine) – research project. PPC and IA-32. Supports Apache Harmony and GNU Classpath libraries. Eclipse Public License.
  • leJOS – Robotics suite, a firmware replacement for Lego Mindstorms programmable bricks, provides a Java programming environment for the Lego Mindstorms RCX and NXT robots.
  • Maxine – meta-circular open source research VM from Oracle Labs and the University of Manchester.

Inactive

  • Apache Harmony – supports several architectures and systems. Discontinued November 2011. Apache License 2.0.
  • GCJ the GCC Java compiler, that compiles either to bytecode or to native machine code. As of GCC 7, gcj and associated libjava runtime library have been removed from GCC.[1]
  • IKVM.NET – Java for Mono and the Microsoft .NET Framework. Uses OpenJDK. Zlib License.
  • JamVM – developed to be an extremely small virtual machine. Uses GNU Classpath and OpenJDK. Supports several architectures. GPL. Last update 2014.
  • JOP
    – hardware implementation of the JVM. GPL 3.
  • JavaME experimental JVM
    developed to run on the NUXI operating system.
  • Jupiter – uses Boehm garbage collector and GNU Classpath. GPL. Unmaintained.
  • Kaffe – uses GNU Classpath. GPL. 1.1.9 released on February 26, 2008.
  • BSD-style licence
    .
  • Atmel AVR
    ATmega8 used in the Asuro Robot, can be ported to other AVR-based systems.
  • SableVM – first free software JVM to support JVMDI and JDWP. Makes use of GNU Classpath. LGPL. Version 1.13 released on March 30, 2007.
  • Java ME
    VM for embedded systems and small devices. Cross-Platform. GPL.
  • SuperWaba – Java-like virtual machine for portable devices. GPL. Discontinued, succeeded by TotalCross.
  • TakaTuka – for wireless sensor network devices. GPL.
  • TinyVM.
  • VMKit of LLVM.
  • BSD-style licence. No longer under active development, superseded by Mika VM
    .

Java operating systems

Some JVM's are intended to run without an underlying OS.

  • JX – Java operating system that focuses on a flexible and robust operating system architecture developed as an open source system by the University of Erlangen. GPL. Version 0.1.1 released on October 10, 2007
  • JavaOS – Original project from Sun Microsystems

Proprietary implementations

Active

  • Azul Platform Prime – a fully compliant, high-performance Java virtual machine based on OpenJDK that uses Azul Systems's C4 garbage collector and Falcon JIT compiler.
  • JamaicaVM (aicas) – a hard real-time Java VM for embedded systems.

Inactive

Lesser-known proprietary Java virtual machines

  • Blackdown Java was a licensed port to Linux of the reference SunSoft implementation. It was discontinued in 2007, after OpenJDK became available.
  • Sun CVM – CVM originally standing for "Compact Java Virtual Machine".
  • Gemstone
    – modified for Java EE features (application DBMS).
  • Intent
    (Tao Group).
  • PreonVM – a Java VM for embedded systems and small and resource constrained devices.

See also

References

  1. ^ "GCJ - GCC Wiki". gcc.gnu.org.

External links

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