How many jvms

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Newsletter Topics Select minimum 1 topic. Tags: Java. Kiran Kumar Posted April 9, 0 Comments. Register or Login.

Welcome back! Reset Your Password We'll send an email with a link to reset your password. Add a comment. Active Oldest Votes. Improve this answer. Garry Harthill. Virtualisation is how we handle it where i work.

And if you pool virtualized servers what then? Sorry if i wasn't clear - you host each application on its own virtual server with only the JVM version it requires. Ken Liu. Very solid information. Once the varient is normalized the issue still on the box itself is how to advertise that location.

Chris Nava. I guess I could relocate the various links with symbolic links and indeed have what I want. This is a decent proposition. I will have to research the alternatives implementation in Linux. Thank you for your answer. I'm stuck in JDK mode. Application teams can't have it both ways. I want the applicaiton teams to be able to choose among the available installed options while not typing me to a particular location. Having multiple JVM's on the box would force me to apply patches in multiple locations so I would not do that.

Peter Lawrey. We want to avoid automatic updates to machines. Sign up or log in Sign up using Google. Sign up using Facebook. Sign up using Email and Password. Post as a guest Name. Email Required, but never shown. The Overflow Blog. In addition, the jdk also contains some additional commands like javac for developers. You can have multiple jdk's and or jse's available on a single machine. Once you've figured out where each of the various jdk's and jse's are located on your system, then you can start to figure out which version of java is used to start each of the programs.

Each java program will startup using the default jvm. Open a command window or terminal and try java -version to determine which version is the current default. Rather than using the default java version, programs can also be started to use a specific java version. For example, sometimes I create a custom windows shortcut to open Eclipse using a specific version of the jdk. As of java 5, there's a tool named jconsole that might also help you determine which programs are running in which verions of jvms.

Simply open a console, and type jconsole and you should get a nice GUI that shows all the programs running in the default jvm. I think you might even be able to inspect programs classpaths. You'll have to see which jars or classes are on each classpath to figure out if a class is loaded or not. We can call different jvm like JDK 1.

I do so. The thing is JVM does not always run on your system. It is like any other software. When you run a jar file, it starts running. All classes in a jar file run on a single JVM. As you may guess. You can run as many as you wish JVM on the same machine. You just need to open several CommandPrompt windows and run what you want via java or javaw application. Main method is the first thing that runs when you start some Java app.

Of course, main is situated in some of your classes. That's all. Stack Overflow for Teams — Collaborate and share knowledge with a private group. Create a free Team What is Teams?