classes loaded by jvm

Question

I have a running jvm process and I want a tool to get classes loaded by that jvm, are there one?

Jakub Kubrynski · Accepted Answer · 2015-03-16 12:53:10Z

12

You can use jmap -histo <PID>

It'll show histogram of loaded classes including classname, number of instances, size, etc

answered Mar 16, 2015 at 12:53

Jakub Kubrynski

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Erik · Accepted Answer · 2011-03-20 01:51:20Z

jinfo <pid>

will give you quite a bit information, including the classpath and the jars in the path. see here

The jinfo command may be limited by the permissions granted to the principal running the command. The command will only list the JVMs for which the principle has access rights as determined by operating system specific access control mechanisms.

Note also that jinfo is not available on windows or linux itanium.

I've amended my info. You're on windows and so out of luck when it comes to jinfo. IMHO, use bot trojanfoe and Umesha Kacha:s answers

Umesh Kacha · Accepted Answer · 2011-03-16 09:27:46Z

3

You can use the following in the command line

java -verbose:class ....

and the JVM will dump out what it's loading including all its locations

answered Mar 16, 2011 at 9:27

Umesh Kacha

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1 Comment

michael nesterenko Over a year ago

it will put loaded classes into the standard output, so messing with program output isn't it? so how can I redirect it to some other location?

Yuriy Semen · Accepted Answer · 2011-03-16 09:27:26Z

try visual VM. It is free but is not distributed with JRE/JDK but you can download it from official oracle website. Also you can make a heap dump and than you can view it by standard tools from JDK.

VisualVM is distributed with (at least) the JDK, no manual download is necessary.

trojanfoe · Accepted Answer · 2011-03-16 09:28:54Z

0

If the process has JMX enabled then you can use jvisualvm (bundled with the JDK) to examine such properties.

answered Mar 16, 2011 at 9:28

trojanfoe

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2 Comments

michael nesterenko Over a year ago

There is nice tab Classes, but is it possible to see where each Class has come from (file path etc)? Is it possible at all?

trojanfoe Over a year ago

No, I'm sorry I don't if there is.

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