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• Version information

• Technical information

• Supported CPU architectures

• Supported operating systems

• References

| Name | Creator | First public release | Latest stable version | Latest release date | Cost, availability | License |

|---|---|---|---|---|---|---|

| Eclipse OpenJ9 (formerly IBM J9) | IBM | 15 Mar 2018 [ 1 ] | 0.51.0 [ 2 ] | 5 May 2025 ( 5 May 2025 ) | Free | Eclipse Public License 2.0 Apache License 2.0 |

| GCJ | GNU | 6 September 1998 | 6.4 (Terminal) | 4 July 2017 | Free | GPL version 2 or later, with the "libgcc exception" [ 3 ] |

| GraalVM | Oracle | May 2019 | Oracle GraalVM for JDK 24 [ 4 ] | 18 March 2025 ( 18 March 2025 ) | Free | GPL version 2 only |

| HotSpot , OpenJDK edition | Sun Microsystems , Oracle | 27 April 1999 | jdk-16 | 16 March 2021 | Free | GPL version 2 only |

| HotSpot , Oracle JDK edition | Sun Microsystems , Oracle | 27 April 1999 | jdk 16 | 16 March 2021 | Free | Proprietary |

| HotSpot , Java SE embedded edition | Sun Microsystems , Oracle | 27 April 1999 | ? | ? | Commercial | Proprietary [ 5 ] |

| HotSpot , Zero port | Gary Benson [ 6 ] | ? | ? | ? | Free | GPL version 2 only |

| IKVM | Jeroen Frijters | 28 June 2004 | 8.12.0 [ 7 ] | 27 June 2025 ( 27 June 2025 ) | Free | zlib License [ 8 ] |

| JAmiga | Peter Werno, Joakim Nordström | 19 May 2005 [ 9 ] | 1.2 | 6 January 2014 | Free | GPL version 2 or later |

| JamVM | Robert Lougher | 13 March 2003 | 2.0.0 | 30 July 2014 | Free | GPL version 2 or later |

| Jato VM | Pekka Enberg and contributors [ 10 ] | ? | 0.3 [ 11 ] | 4 January 2012 [ 11 ] | Free | GPL version 2 only [ 10 ] |

| JC virtual machine | Archie L. Cobbs | ? | 1.4.7 | 13 November 2005 | Free | LGPL version 2.1 or later |

| Jikes RVM | IBM | 14 October 2001 | 3.1.4 [ 12 ] | 18 February 2016 [ 12 ] | Free | Eclipse Public License version 1.0 [ 13 ] |

| Kaffe | Transvirtual Technologies | 1996 | 1.1.9 | 22 February 2008 | Free | GPL version 2 or later [ 14 ] |

| Mysaifu JVM | ? | 16 April 2005 [ 15 ] | 0.4.8 [ 15 ] | 5 March 2010 [ 15 ] | Free | GPL version 2 only [ 15 ] |

| SableVM | Sable Research Group | ? | 1.13 | 30 March 2007 [ 16 ] | Free | LGPL version 2.1 or later |

| JVM | Status | Latest supported Java version | Supported class libraries | Supported class libraries | Supported class libraries | Performance | Performance | Performance |

|---|---|---|---|---|---|---|---|---|

| JVM | Status | Latest supported Java version | GNU Classpath | OpenJDK | Other | Interpretation | AOT | JIT |

| GCJ | No longer maintained or distributed by GNU as of GCC 7 [ 17 ] | ? | Yes | No | | Yes | Yes | No |

| HotSpot , OpenJDK edition | Reference implementation. | 1.8 | No | Yes | | Yes | No | Yes |

| HotSpot , Oracle JDK edition | Reference implementation. | 1.8 | No | Yes | | Yes | No | Yes |

| HotSpot , Java SE embedded edition | | ? | No | Yes | | Yes | No | Yes |

| HotSpot , Zero port | Interpreter-only port of OpenJDK using almost no assembly language and designed to be very portable. | 1.7 | No | Yes | | Yes | No | No |

| IKVM | | 1.8 [ 18 ] | ? | ? | | Depends on .NET runtime | Depends on .NET runtime | Depends on .NET runtime |

| JAmiga | | 1.4 [ 19 ] | Yes [ 20 ] | No | | Yes [ 21 ] | No | No |

| JamVM | | 1.8 [ 22 ] | Yes [ 23 ] | Yes [ 23 ] | | Yes [ 23 ] | No | Yes [ 23 ] |

| Jato VM | | 1.6 [ 24 ] | Yes [ 11 ] | No [ 25 ] | | No [ 25 ] | No [ 25 ] | Yes [ 11 ] |

| JC virtual machine | Translates Java to C and compiles it with a C compiler. | 1.4 [ 26 ] | Yes [ 27 ] | No | | Yes [ 28 ] | Yes [ 28 ] | Yes [ 28 ] |

| Jikes RVM | | 1.6 [ 29 ] | Yes [ 30 ] | Port [ 31 ] [ 32 ] | Apache Harmony [ 30 ] | No [ 33 ] | ? | Yes |

| Kaffe | | 1.4 [ 14 ] | Yes [ 14 ] | No | | Yes [ 14 ] | No [ 14 ] | Yes [ 14 ] |

| Mysaifu JVM | | ? | Yes [ 34 ] | No | | Yes [ 35 ] | No [ 35 ] | No [ 35 ] |

| SableVM | Unmaintained | 1.4 | Yes | No | | Yes | No | No |

| JVM | x86 | x86-64 | SPARC | MIPS | Itanium | Power ISA | ARM | Alpha | S/390 | z/Architecture | m68k |

|---|---|---|---|---|---|---|---|---|---|---|---|

| GCJ | Yes [ 36 ] | Yes [ 36 ] | Yes [ 36 ] | Yes [ 36 ] | Yes [ 36 ] | Yes [ 36 ] | Yes [ 36 ] | Yes [ 36 ] | Yes [ 36 ] | No [ 36 ] | No [ 36 ] |

| HotSpot , OpenJDK edition | Yes [ 37 ] | Yes [ 37 ] | Solaris only [ 37 ] | Port [ 38 ] [ 39 ] | No [ 37 ] | PowerPC / AIX port [ 40 ] | Yes [ 37 ] | No [ 37 ] | No [ 37 ] | No [ 37 ] | No [ 37 ] |

| HotSpot , Oracle JDK edition | Yes [ 37 ] | Yes [ 37 ] | Solaris only [ 37 ] | No [ 37 ] | Java 1.6 [ 41 ] | No [ 37 ] | Yes [ 37 ] | No [ 37 ] | No [ 37 ] | No [ 37 ] | No [ 37 ] |

| HotSpot , Java SE embedded edition | Yes [ 5 ] | Yes [ 5 ] | Yes [ 5 ] | ? | ? | Yes [ 5 ] | Yes [ 5 ] | ? | ? | ? | ? |

| HotSpot , Zero port | Yes [ 42 ] | Yes [ 42 ] | No [ 42 ] | Yes [ 42 ] | Yes [ 42 ] | Yes [ 42 ] | Yes [ 42 ] | Yes [ 42 ] | No [ 42 ] | Yes [ 42 ] | No [ 42 ] |

| IKVM | Depends on .NET runtime | Depends on .NET runtime | Depends on .NET runtime | Depends on .NET runtime | Depends on .NET runtime | Depends on .NET runtime | Depends on .NET runtime | Depends on .NET runtime | Depends on .NET runtime | Depends on .NET runtime | Depends on .NET runtime |

| JAmiga | ? | ? | No | No | No | Yes | No | No | No | No | Yes |

| JamVM | Yes [ 23 ] | Yes [ 23 ] | Yes [ 23 ] | Yes [ 23 ] | No [ 23 ] | Yes [ 23 ] | Yes [ 23 ] | No [ 23 ] | No [ 23 ] | No [ 23 ] | No [ 23 ] |

| Jato VM | Yes [ 11 ] | Under development [ 43 ] | No | No | No | Under development [ 43 ] | Preliminary ARMv5 support [ 25 ] | No | No | No | No |

| JC virtual machine | Yes | No | No | No | No | No | No | No | No | No | No |

| Jikes RVM | Yes [ 44 ] | No [ 44 ] | No [ 44 ] | No [ 44 ] | No [ 44 ] | Yes [ 44 ] | No [ 44 ] | No [ 44 ] | No [ 44 ] | No [ 44 ] | No [ 44 ] |

| Kaffe | Yes [ 14 ] | Yes [ 14 ] | Yes [ 14 ] | Yes [ 14 ] | Yes [ 14 ] | Yes [ 14 ] | Yes [ 14 ] | Yes [ 14 ] | Yes [ 14 ] | No [ 14 ] | Yes [ 14 ] |

| Mysaifu JVM | No [ 45 ] | No [ 45 ] | No [ 45 ] | No [ 45 ] | No [ 45 ] | No [ 45 ] | Yes [ 45 ] | No [ 45 ] | No [ 45 ] | No [ 45 ] | No [ 45 ] |

| SableVM | Yes [ 46 ] | Yes | Yes [ 46 ] | Yes | Yes [ 46 ] | Yes [ 46 ] | Yes [ 46 ] | Yes [ 46 ] | Yes [ 46 ] | No [ 46 ] | Yes [ 46 ] |

| JVM | Windows | Linux | FreeBSD | NetBSD | OpenBSD | Solaris | OpenSolaris | Darwin | macOS | AIX | IRIX | Other |

|---|---|---|---|---|---|---|---|---|---|---|---|---|

| GCJ | Yes [ 36 ] | Yes [ 36 ] | Yes [ 36 ] | ? | ? | Yes [ 36 ] | ? | Yes [ 36 ] | Yes [ 36 ] | ? | Yes [ 36 ] | DEC OSF 4.0f and 5.1, Hitachi SH-3/4 micro-controller [ 36 ] |

| HotSpot , OpenJDK edition | Yes [ 47 ] (distributed as source code) | Yes | Port [ 48 ] | Port [ 48 ] | Port [ 48 ] | Yes | Yes [ 49 ] | ? | Yes [ 50 ] | Port [ 40 ] | No | OS/2port, [ 51 ] Haiku port [ 52 ] |

| HotSpot , Oracle JDK edition | Yes [ 37 ] | Yes [ 37 ] | No | No | No | Yes [ 37 ] | ? | ? | Yes [ 37 ] | No | No | |

| HotSpot , Java SE embedded edition | Yes [ 5 ] | Yes [ 5 ] | No [ 5 ] | No [ 5 ] | No [ 5 ] | Yes [ 5 ] | ? [ 5 ] | No [ 5 ] | No [ 5 ] | No [ 5 ] | No [ 5 ] | |

| HotSpot , Zero port | No [ 42 ] [ 53 ] | Yes [ 42 ] [ 53 ] | No [ 42 ] [ 53 ] | No [ 42 ] [ 53 ] | No [ 42 ] [ 53 ] | No [ 42 ] [ 53 ] | No [ 42 ] [ 53 ] | No [ 42 ] [ 53 ] | No [ 42 ] [ 53 ] | No [ 42 ] [ 53 ] | No [ 42 ] [ 53 ] | |

| IKVM | Depends on .NET runtime | Depends on .NET runtime | Depends on .NET runtime | Depends on .NET runtime | Depends on .NET runtime | Depends on .NET runtime | Depends on .NET runtime | Depends on .NET runtime | Depends on .NET runtime | Depends on .NET runtime | Depends on .NET runtime | Depends on .NET runtime |

| JAmiga | No | No | No | No | No | No | No | No | No | No | No | AmigaOS |

| JamVM | No [ 23 ] | Yes [ 23 ] | Yes [ 23 ] | No [ 23 ] | Yes [ 23 ] | Yes [ 23 ] | Yes [ 23 ] | Yes [ 23 ] | Yes [ 23 ] | No [ 23 ] | No [ 23 ] | Jailbroken iPhone, [ 22 ] kFreeBSD |

| Jato VM | No [ 43 ] | Yes [ 43 ] | No [ 43 ] | No [ 43 ] | No [ 43 ] | No [ 43 ] | No [ 43 ] | Under development [ 43 ] | ? [ 43 ] | No [ 43 ] | No [ 43 ] | |

| JC virtual machine | No | Yes | Yes | No | No | No | No | No | No | No | No | |

| Jikes RVM | No [ 44 ] | Yes [ 44 ] | No [ 44 ] | No [ 44 ] | No [ 44 ] | No [ 44 ] | No [ 44 ] | No [ 44 ] | Yes [ 44 ] | Yes [ 44 ] | No [ 44 ] | |

| Kaffe | Using Cygwin [ 14 ] | Yes [ 14 ] | Yes [ 14 ] | Yes [ 14 ] | Yes [ 14 ] | Yes [ 14 ] | ? | Yes [ 14 ] | Yes [ 14 ] | Yes [ 14 ] | Yes [ 14 ] | AmigaOS, BeOS, several others [ 14 ] |

| Mysaifu JVM | No [ 45 ] | No [ 45 ] | No [ 45 ] | No [ 45 ] | No [ 45 ] | No [ 45 ] | No [ 45 ] | No [ 45 ] | No [ 45 ] | No [ 45 ] | No [ 45 ] | Windows Mobile |

| SableVM | Using Cygwin [ 46 ] | Yes [ 46 ] | Yes [ 46 ] | ? | ? | ? | ? | ? | Yes [ 46 ] | ? | ? | |

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