Re: JVM and java application

From:

=?ISO-8859-1?Q?Arne_Vajh=F8j?= <arne@vajhoej.dk>

Newsgroups:

comp.lang.java.programmer

Date:

Mon, 25 Jan 2010 20:05:16 -0500

Message-ID:

<4b5e3fca$0$283$14726298@news.sunsite.dk>

On 25-01-2010 01:17, Mike Schilling wrote:

Knute Johnson wrote:

On 1/24/2010 7:56 PM, Jack wrote:

If there are several java applications/programs running on the same
machine, are these java applications/programs using their own JVMs
or
are they share the same JVM?

Each time you start a Java app, you create a new JVM. That's not to
say that you can't have a Java program that loads other Java
programs
if you want them run on the same JVM. I don't know what the state
of
things is in browsers for sure but I would suspect that every applet
that is loaded gets its own JVM.

Web servers and application servers, in general, run all of their
applications in a single JVM (or perhaps a replicated set of JVMs,
each of which can run any of their applications.)

Java EE has a different application concept than Java SE.

Seen from Java SE perspective the app server is the app
and the ear's are plugins.

Seen from Java EE perspective the ear's are multiple apps.

Arne