Java command line error (could not find or load main class)

Question

When attempting to run the below command:

java -classpath mycompanychecks.jar:checkstyle-5.7-all.jar \
 com.puppycrawl.tools.checkstyle.Main \
 -c config.xml -r .

I get the error:

Error: Could not find or load main class \

In the directory that I'm running the command from I do have the two jar files, and also I have checked that 'com.puppycrawl.tools.checkstyle.Main' does in fact reside in the 'checkstyle-5.7-all.jar'. As the error seems to refer to the backslash maybe it's a syntactical error? However I'm executing the command exactly as stated on the checkstyle page.

peter.petrov · Accepted Answer · 2014-05-15 22:58:33Z

4

This example you're trying is clearly not about Windows.

Check here:
http://docs.oracle.com/javase/7/docs/technotes/tools/windows/classpath.html

You need to use ; as separator to say the least.

So you need something like this (this is all one line).

java -classpath c:\test\mycompanychecks.jar;c:\test\checkstyle-5.7-all.jar com.puppycrawl.tools.checkstyle.Main -c config.xml -r .

edited May 15, 2014 at 22:58

answered May 15, 2014 at 21:54

peter.petrov

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2 Comments

Force444 Over a year ago

Using ; as you said and removing the path separators, actually gets rid or the error. I do get another error with the config.xml file but that's another issue. You're answer was correct for this question, thanks. Do you know which OS the original command was intended for?

peter.petrov Over a year ago

I think it was about Unix and Linux. I don't know Mac OS. It might work OK on Mac OS too but I am not sure about that.

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