JavaOS was an operating system developed by Sun Microsystems that used a Java virtual machine as its core component. Unlike other systems written in C, JavaOS was primarily written in Java. It ran on devices like set-top boxes and ATMs but was later deprecated. Other similar Java-based operating systems included JexeOS, JX, SavaJe, and Vino, though most were unsuccessful or abandoned. The Java Desktop System, while using a Java name, was actually based on GNOME and not fully written in Java. It aimed to provide a desktop experience for Solaris and later Oracle Solaris but was ultimately discontinued.

1. Java Operating
System
Represented By
Roll No 6745
Roll No 67==

2. JavaOS
 JavaOS is an operating system with
a java virtual machine as a
fundamental component, originally
developed by sun Microsystems.
 Unlike Windows, Mac
OS, Unix or Unix-like systems which
are primarily written in
the C programming language, JavaOS
is primarily written in Java.
 It is now considered a legacy system.

3. History
 JavaOS was originally announced in 1996
by Sun's Java Soft subsidiary as a
compact OS designed to run "in anything
from net computers to pagers
 It supports a password protected login,
own device drivers, has its own window
system and API and can execute several
Java applets at the same time

4. History
 Java Soft has granted licenses to more
than 25 manufacturers, including Oracle
Corp, Acer Inc., Xerox, Toshiba Corp and
Nokia.
 In 1999, Sun and IBM announced the
end of the JavaOS project.As early as
2003, Sun materials referred to JavaOS
as a "legacy technology", recommending
migration to Java ME, leaving the choice
of specific OS and Java environment to
the implementer.

5. Design
 The system is based on a hardware
architecture native microkernel
 The Java virtual machine runs on top of
the microkernel.
 Platforms that the kernel runs on include:
 ARM
 PowerPC
 SPARC
 Strong ARM
 IA-32

6. Design
 All device drivers are written in Java
and executed by the virtual machine.
 A graphics and windowing system is
also written in Java

7. Applications
 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 Java
Station.

8. JexeOS
 JexeOS is a personal computer
operating system from Toshiba
Information Systems of Japan that is
dedicated to running Java applications
on x86-based systems.
 A 1.0 beta version was available as of
late 1997

9. JX (operating system)
 JX is a microkernel operating system
with both the kernel and applications
implemented using
the Java programming language.
 JX is implemented as an extended Java
Virtual Machine adding support to the
Java system for necessary features such
as protection domains and hardware
access, along with a number of
components written in Java that provide
kernel facilities to applications running on
the computer

10. Advantages of JX(OS)
 The primary benefits of JX include:
 a small trusted computing base results
in a high security system
 lack of address space switching
enables high performance compared
to most microkernel systems

11. SavaJe
 SavaJe Technologies (pronounced
savage) was the developer of
the SavaJe OS, a Java OS for advanced
mobile phones.
 . The SavaJe Java platform included a
full implementation of Java Swing,
enabling developers to create
applications with richer user interfaces.
 In September 2010, the Mass High Tech
Journal reported that the inspiration
of Android technology has strong ties to
the creation and development of the
SavaJe platform.

12. Vino (operating system)
 Vino was a now-inactive project at
Harvard University that sought to
develop an extensible-kernel
operating system based

13. Java Desktop System
 Java Desktop System, briefly known
as Open Solaris Desktop, is a desktop
environment developed first by Sun
Microsystems and then by Oracl
Corporation after the 2010 Oracle
acquisition of Sun.
 Java Desktop System aims to provide a
system familiar to the average computer
user with a full suite of office productivity
software such as an office suite, a web
browser, email, calendaring, and instant
messaging .

14. Home Screen capture

15. Java Desktop System
 The Java Desktop System, it is not
actually written in Java. Rather, it is
built around a tweaked version of
GNOME along with other common
free software projects, which are
written mostly in C and C++.

17. Versions Of
Java Desktop System
 Sun first bundled a preview release of
GNOME 1.4 on a separate CD for
Solaris 8.
 JDS version 2
 Real Player and Mozila are the
famous apps .