JavaOS is an operating system with a Java virtual machine as a fundamental component. It is developed by Sun Microsystems. Unlike UnixorUnix-like systems which are primarily written in the C programming language, JavaOS is primarily written in the Java programming language.
As of 2006, Sun considers JavaOS a legacy system (see Future).
The system is based on a hardware architecture native microkernel.
Platforms that the kernel runs on include
The Java virtual machine runs on top of the microkernel.
All device drivers are written in Java and executed by the virtual machine. The execution depends on
A graphics and windowing system, implementing the AWT API is also written in Java.
JavaOS was designed to run on embedded systems and has applications in devices such as set top boxes, networking infrastructure and ATMs. It's also the operating system that comes with the JavaStation.
Sun now officially considers JavaOS a legacy system and recommends migration to Java ME [1]. This by itself however is not a full replacement, as Java ME is an API specification, which runs on top of an operating system, and is not an operating system in itself.
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