Steve,
I do not think you should exec the java program with the name of the class
library as the call parameter. Instead, the library "HelloWorld.class"
will contain one class with a main-function (method as java folks say) and
may be other classes. Ask the provider of the class library about this
class name. The class name is to be passed to the java program for
execution. For example:
file /u/USERID/Hello.java:
class MAIN {
public static void main(String args[]) {
.... do something like System.out.println("Hello World");....
}
}
Then compile the source to the class-file:
javac /u/USERID/Hello.java
will result in /u/USERID/Hello.class
(May be you need a couple of extra parameters for this to happen
correctly.)
These two steps are done from the development team. They will tell you
about the name of the "main" class.
Then run the class with java -cp /u/USERID MAIN
Like the "-cp" parameter you can provide various other parameters to tune
the java program's behaviour. One of those is -Dfile.encoding=whatever.
For JZOS, these parameters are defined in the symbol IBM_JAVA_OPTIONS.
Cheers
Michael
Steve Comstock <st...@trainersfriend.com>
Gesendet von: IBM Mainframe Discussion List <IBM-MAIN@BAMA.UA.EDU>
06.10.2009 14:09
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Deeper java problem
Replying to my first post about a Java compile
program, several people suggested it was a
codepage issue. And that was my first thought,
too, since I had been experimenting with
various code pages in my emulator.
However, with codepages matching in both the
old and the new system, I cut and pasted from
the old to the new and reran the compile. Same
result.
Michael Klaeschen suggested I check file.encoding
and the symbol IBM_JAVA_OPTIONS, but I can't find
those. I'm just issuing the javac command directly
under omvs.
More disturbing, I did a cd to the JAVA_HOME directory:
cd /u/Java6_31/J6.0
And an 'ls' showed:
-rw-r--r-- 1 TCPIP IPGROUP 425 Jun 3 22:39 HelloWorld.class
drwxr-xr-x 2 TCPIP IPGROUP 8192 Mar 14 2008 IBM
-rw-r--r-- 1 TCPIP IPGROUP 6 Jun 3 22:39 JDK_INSTALL_OK
drwxr-xr-x 4 TCPIP IPGROUP 8192 Jun 3 22:39 bin
-rw-r--r-- 1 TCPIP IPGROUP 833 Mar 22 2009 copyright
drwxr-xr-x 13 TCPIP IPGROUP 8192 Jun 3 22:36 demo
drwxr-xr-x 16 TCPIP IPGROUP 8192 Jun 3 22:39 docs
drwxr-xr-x 3 TCPIP IPGROUP 8192 Jun 3 22:36 include
drwxr-xr-x 13 TCPIP IPGROUP 8192 Jun 3 22:35 lib
-rw-r--r-- 1 TCPIP IPGROUP 44534 Jun 3 22:39 license_en.txt
drwxr-xr-x 3 TCPIP IPGROUP 8192 Jun 3 22:37 mvstools
-rw-r--r-- 1 TCPIP IPGROUP 36370 Jun 3 22:40 notices.txt
-rw-r--r-- 1 TCPIP IPGROUP 1694 May 29 09:41 readmefirst.zos.txt
-rw-r--r-- 1 TCPIP IPGROUP 9084677 Jun 3 22:19 src.zip
drwxr-xr-x 5 TCPIP IPGROUP 8192 Jun 3 22:40 standard
But when I tried to run the sample, here is what I got:
java HelloWorld.class
Exception in thread "main" java.lang.NoClassDefFoundError:
HelloWorld.class
Caused by: java.lang.ClassNotFoundException: HelloWorld.class
at java.net.URLClassLoader.findClass(URLClassLoader.java:419)
at java.lang.ClassLoader.loadClass(ClassLoader.java:643)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:345)
at java.lang.ClassLoader.loadClass(ClassLoader.java:609)
Could not find the main class: HelloWorld.class. Program will exit.
just to be sure, I looked at PATH and CLASSPATH:
printenv PATH
/u/Java6_31/J6.0/bin:/usr/lpp/pli/bin:/usr/lpp/internet/bin:/usr/lpp/cobol/bin:/bin:.
printenv CLASSPATH
/u/scomsto/CGI:/u/scomsto/public_html/Java:/usr/lpp/internet/server_root/cgi-bin:/u/Java6_31/J6.0:/u/Java6_31/J6.0/src.zip:.
In both cases, the '.' at the end should ensure a search
in the current working directory. And I was running in
the JAVA_HOME directory. And I can see the class right
there before me.
Any suggestions at this point?
--
Kind regards,
-Steve Comstock
The Trainer's Friend, Inc.
303-393-8716
http://www.trainersfriend.com
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+ How things work
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