免费和开源的 Java 虚拟机
AegisVM (inactive since 2004).
Apache Harmony — supports several architectures and systems. Discontinued November 2011. Apache License .
Avian — A small, easily embeddable Java VM and classpath using just-in-pilation.
Azul Zulu — is an OpenJDK build supported by Azul Systems. It is open source and free to download. The initial release ran on Windows Server 2008 R2 and 2012 on the Windows Azure Cloud. Release in January 21, 2014 supports multiple versions of Linux as well as Amazon Web Services, Rackspace and various hypervisors. Also added an Enterprise version with subscription support available. In June 2014 Mac OS X support was added. [1]
Bck2Brwsr — small JVM capable to boot fast and run in 100% of modern browsers including those that have no special support for Java. Last release in September, 2013.
CACAO — uses GNU Classpath, supports multiple architectures. GPL. released September 4, 2012.
GCJ the GCC piler, piles either to bytecode or to native machine code. The product is currently in maintenance mode.
HaikuVM, for Atmel AVRs (Arduino) and other micros using the leJOS runtime.
HotSpot, the primary reference Java VM implementation.
IcedTea — has the only working free software Java Web browser plugin. GPL+linking exception.
— Java for Mono and the Microsoft .NET Framework. UsesOpenJDK. Zlib License.
Jamiga — for the Amiga platform. D
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