asked on

SIMPLE: help executing basic java command

I have been using IDEs for way too long... i can't execute a class

I am in mydir

in mydir is build

in build is

org/demo/myproduct

in myproduct is myclass with a main method

whne I'm in mydir, i am running

java -cp build org.demo.myproduct.myclass

but getting a no class def error, what am i doing wrong?

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SnO2d

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SOLUTION

CEHJ

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jfredrickson

Are you trying to do this from the command line?

In the command line, navigate to mydir. Then you can either navigate to the folder with the files, or just type:

java build/org/demo/myproduct/myclass

It might be easier to navigate to the actual folder though. From mydir:

cd build
cd org
cd demo
cd myproduct
java myclass

jjacksn

ASKER

jf - that doesn't not work, does it need to be qualified?

ok, if I go into build, this works

java -cp . org/demo/myproduct/myclass

however, i'm executing in ANT, and my basedir is in the parent directory of build. so how do I set my class path?

jjacksn

ASKER

yeah, I don't know what was happening before, that does work from the command line.

however, in ANT i have:

<target name="create-keys">
      <java classname = "org.sharedrecords.demo.KeyStoreGenerator">
            <arg value = "build/org/sharedrecords/demo/utils"/>
            <classpath path="build"/>
      </java>
</target>

and it doesn't work.

SOLUTION

Mick Barry

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jjacksn

ASKER

still no luck. Is there someway i can turn verbose mode on while running from eclipse?

jjacksn

ASKER

i ran it from the command line... didn't see anything useful. just "could not find org.sharedrecords.demo.KeyStoreGenerator"

Mick Barry

> and my basedir is in the parent directory of build.

are you sure thats the case? try settting the dir attribute for the java task

jjacksn

ASKER

i used dir = "${basedire}"

a got this message [java] Working directory ignored when same JVM is used.

Mick Barry

run ant with -verbose and see what that tells you.

jjacksn

ASKER

wow, so, as it turns out, suprisingly enough, KeySTOREGenerator != KeyPAIRGenerator. that was fun.

CEHJ

:-)