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From sebb <seb...@gmail.com>
Subject Re: Using apache.commons.cli with Java 1.4.2
Date Mon, 15 Jun 2009 22:11:00 GMT
On 15/06/2009, esharris <esharris@mac.com> wrote:
>
>
>
>  esharris wrote:
>  >
>  >
>  >
>  > beeky wrote:
>  >>
>  >> I'm jumping in sort of late on this, but here goes.
>  >>
>  >> To locate local config issues do the following.
>  >>
>  >> Create a simple script, call it 'view_cpath.bat', to invoke your app and
>  >> output the classpath before the line that calls your app.
>  >>
>  >> ------ begin script (windows batch file example):
>  >> echo classpath=%classpath%
>  >> java my.org.myapp %*
>  >> -----  end script
>  >>
>  >> invoke your app with view_cpath.bat ... normal arg list ...
>  >>
>  >> With classpath in hand, check the following:
>  >> 1. is the cli jar file explicitly named in the classpath?  *.jar will
>  >> not work.
>  >> 2. is the jar file actually in the place where the classpath says it
>  >> should be?  Use dir or ls on classpath entries to be sure.
>  >> 3. check for misspellings of the jar file name in classpath.  The
>  >> spelling is relative, obviously both classpath entry and actual jar file
>  >> must be spelled the same.  Commons jar files have lots of '-' and '.',
>  >> it is easy to get them wrong.  I've done it many, many times!
>  >>
>  >> This will find the problem is it is just local configuration.
>  >>
>  >> To make sure you are using the correct jar file do the following.
>  >> use 'jar tvf  commons-cli-1.1.jar' (from the directory that contain the
>  >> jar file) to view the contents of the jar file.  In the output you
>  >> should see something like:
>  >>
>  >> 423 Wed Jul 04 19:48:06 EDT 2007
>  >> org/apache/commons/cli/CommandLineParser.class
>  >>
>  >> If you don't see this you have a bad/wrong jar file.  Try downloading
>  >> again.
>  >>
>  >> Hope this helps,
>  >> -=beeky
>  >>
>  >>
>  >>
>  >> esharris wrote:
>  >>> This the only message:
>  >>>
>  >>> Exception in thread "main" java.lang.NoClassDefFoundError:
>  >>> org/apache/commons/cli/CommandLineParser.
>  >>>
>  >>> I only have 1.4.2 java on my machine.
>  >>>
>  >>> Earl
>  >>>
>  >>> Emmanuel Bourg-3 wrote:
>  >>>
>  >>>> esharris a écrit :
>  >>>>
>  >>>>
>  >>>>> IMHO, NoClassDefFoundError is hard to debug.
>  >>>>>
>  >>>> Could you paste the full stack trace? Also, check that the code was
>  >>>> compiled with -target 1.4
>  >>>>
>  >>>> Emmanuel Bourg
>  >>>>
>  >>>>
>  >>>> ---------------------------------------------------------------------
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>  >>>>
>  >>>>
>  >>>>
>  >>>>
>  >>>
>  >>>
>  >>
>  >>
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>  >>
>  >>
>  >>
>  >
>  > Initially, there was no CLASSPATH. I added the long name of the
>  > commons-cli-1.2.jar to the class path. The execution of the bat file
>  > displayed the expected class path. But this didn't solve the problem. I
>  > also introduced a JAVA_HOME environment variable that has the path to the
>  > jdk.
>  >
>
>
> If I put both jars in the same directory, extract everything out of the
>  jars, and do a "java {path to main class}", it works.
>
>  IMHO, my ability to set the class path to a jar is broken. And my ability to
>  set the class path to something besides the current directory is broken.

The java command ignores the classpath if you use the -jar option.
This is by design, and is documented:

http://java.sun.com/j2se/1.4.2/docs/tooldocs/windows/java.html#-jar

See the last paragraph for the -jar option.

The problems you are reporting don't seem to be specific to Commons CLI.

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