| JavaOS | |
|---|---|
| Developer | Sun Microsystems |
| Written in | Java (primarily) C andC++ (parts of kernel) |
| OS family | Java |
| Working state | Discontinued |
| Source model | Closed source |
| Initial release | May 29, 1996; 29 years ago (1996-05-29) |
| Latest release | Final / August 23, 1999; 26 years ago (1999-08-23) |
| Available in | English |
| Supported platforms | ARM,PowerPC,SPARC,IA-32 (x86) |
| Kernel type | Microkernel |
| License | Proprietary |
JavaOS is a discontinued[1]operating system based on aJava virtual machine. It was originally developed bySun Microsystems.[2] UnlikeWindows,macOS,Unix, orUnix-like systems which are primarily written in theC orC++ programming languages, JavaOS is primarily written inJava. It is now considered alegacy system.[3]
TheJava programming language was introduced by Sun in May 1995. Jim Mitchell and Peter Madany at JavaSoft designed a new operating system,codenamed Kona, written completely in Java. In March 1996, Tom Saulpaugh joined the now seven-person Kona team to design aninput/output (I/O) architecture, having come from Apple as Macintosh system software engineer since June 1985 and co-architect ofCopland.[4]: XI–XIII
JavaOS was first announced in aByte article.[5] In 1996, JavaSoft's official product announcement described the compact OS designed to run "in anything from net computers to pagers".[2] In early 1997, JavaSoft transferred JavaOS to SunSoft. In late 1997, Bob Rodriguez led the team to collaborate withIBM who then marketed the platform, accelerated development, and made significant key architectural contributions to the next release of JavaOS, eventually renamed JavaOS for Business.[4]: XI–XIII [6] IBM indicated its focus was more on network computerthin clients, specifically to replace traditionalIBM 3270 "green screen" and UnixX terminals, and to implement single application clients.[7]
Chorus, a distributed real-time operating system, was used for its microkernel technology.[4]: XIII This began withChorus Systèmes SA, a French company, licensing JavaOS from Sun and replacing the earlier JavaOS hardware abstraction layer with the Chorus microkernel,[8] thereby creating the Chorus/Jazz product, which was intended to allow Java applications to run in a distributed, real-time embedded system environment.[9] Then in September 1997, it was announced that Sun Microsystems was acquiring Chorus Systèmes SA.[10]
In 1999, Sun and IBM announced the discontinuation of the JavaOS product.[1] As early as 2003, Sun materials referred to JavaOS as a "legacy technology", recommending migration toJava ME, leaving the choice of specific OS and Java environment to the implementer.[citation needed]
JavaOS is based on a hardware architecture nativemicrokernel, running on platforms includingARM,PowerPC,SPARC,StrongARM, andIA-32 (x86). The Java virtual machine runs on the microkernel. Alldevice drivers are written in Java and executed by thevirtual machine. A graphics and windowing system implementing theAbstract Window Toolkit (AWT) application programming interface (API) is also written in Java.[4][page needed]
JavaOS was designed to run onembedded systems and has applications in devices such asset-top boxes,computer networking infrastructure, andautomated teller machines (ATMs). It comes with theJavaStation.[citation needed]
JavaSoft granted licenses to more than 25 manufacturers, includingOracle,Acer,Xerox,Toshiba, andNokia.IBM and Sun announced the cooperation for JavaOS for Business at the end of March 1998.[3]
JavaOS uses a small memory footprint, yet its network-centric design lets it access large-scale services
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