[csu540-f05-rpf] Error compiling java files
Robert Futrelle
futrelle at ccs.neu.edu
Tue Sep 13 22:26:37 EDT 2005
To run a java graphics program, you have to have a system ready to display it.
If you log in to a Solaris box remotely, you have to do it with X11
software (a "server") running on your PC or Mac or Linux machine.
Otherwise, the Solaris box can figure out how to display on the
machine your logging in from.
Since it mentions X11, that's probably your problem.
Simplest thing to do is to load Java on your own machine and do your
work there. To then check it on Solaris, you need to be sitting at a
Solaris machine in the Unix lab in WVH. Or you could do all your
work on a Solaris machine.
What happened to you, I'd guess, is that the program compiled fine -
it just couldn't figure out how to display.
This help?
- RPF
PS: I have a slight problem with my Mac. The new X11 under Tiger
doesn't allow me to display from a remote Solaris box. I still have
a couple of Macs running the earlier X11 and they still work fine.
So I won't be able to demo remote viewing in class, unless I bring in
my old PB, which I might some time.
>Hi Wing/Prof Futrelle/Class,
>
>I'm having the same trouble as you Wing, i tried the unset
>$CLASSPATH and it does not work, anyone have any other ideas?
>
>It doesn't seem as if the files still compile fine as i get the
>following when i try to run SimplestDraw:
>
>Exception in thread "main" java.awt.HeadlessException:
>No X11 DISPLAY variable was set, but this program performed an
>operation which requires it.
> at java.awt.GraphicsEnvironment.checkHeadless
>(GraphicsEnvironment.java:159)
> at java.awt.Window.<init>(Window.java:310)
> at java.awt.Frame.<init>(Frame.java:419)
> at java.awt.Frame.<init>(Frame.java:384)
> at javax.swing.JFrame.<init>(JFrame.java:150)
> at SimplestDraw.setup(SimplestDraw.java:36)
> at SimplestDraw.main(SimplestDraw.java:30)
>
>....unless i made an error somewhere which is entirely possible.
>
>Any help would be great
>
>Thanks,
>Simon
>
>
>On 9/12/05, <mailto:chungwc at ccs.neu.edu>chungwc at ccs.neu.edu
><<mailto:chungwc at ccs.neu.edu>chungwc at ccs.neu.edu> wrote:
>
>Thank you Prof. Futrelle.
>
>That did the trick.
>
>The java files compile fine now.
>
>Thanks,
>Wing
>
>On September 12, 6:45 pm Robert Futrelle
><<mailto:futrelle at ccs.neu.edu>futrelle at ccs.neu.edu> wrote:
>> You should be able to simply do
>>
>> unset $CLASSPATH
>>
>> (depending on your shell)
>>
>> since you don't need any of those oracle paths now.
>> But be sure to make a note of your current ones in case you need
>> them in the future.
>>
>> Look at pages such as
>>
>>
>><http://farside.ph.utexas.edu/teaching/329/lectures/node29.html>http://farside.ph.utexas.edu/teaching/329/lectures/node29.html
>>
>> for a guide to setting your various system variables.
>>
>> Some people in the class may have better suggestions.
>> Suggest away!
>>
>> Note that the default Java on Solaris is now 1.5.
>> Should still compile everything fine.
>>
>> Some people don't use CLASSPATH, since it may change
>> from one project to another. They specify it on the
>> command line. (Can use various aliases - I've done
>> that sometimes.)
>>
>> - RPF
>>
>>
>> > Hi Prof. Futrelle,
>> > Oracle has nothing to do with Computer Graphics, which
>> > is why I'm very puzzled as well. The last class I took which does
>> > java programming in the
>> > Unix environment was CSU430 Database Design. I supposed there is
>> > something that we did in that class that changed the classpath for
>> > java. However, I don't remember what that was and how to undo that.
>> >
>> > The files I was trying to compile were ColorShadeDriver.java and
>> > Shader.java. I also tried compiling some of my old java code from
>> > the Database class I took earlier as well. All of them gave me the
>> > same error.
>> > What should I do to fix this error?
>> >
>> > Thanks,
>> > Wing
>> >
>> > On Mon, 12 Sep 2005, Robert Futrelle wrote:
>> >
>> >> What does Oracle have to do with CSU540, Computer Graphics?
> > >> Was this for some DB class, by chance?
>> >>
>> >> What files were you trying to compile?
>> >>
>> >> - Prof. Futrelle
>> >>
>> >>
>> >> > Hi,
>> >> >
>> >> > I am trying to complete programming assignment 1 and while I
>> >> > was compiling the java files (on a Unix machine in the CCS
>> >> > lab), I received the following error:
>> >> >
>> >> > error: error reading /net/oracle/ora9/CCISCLASS/sqlj/lib/sqljutl
>> >> > .sql;
>> >> > java.util.zip.ZipException: error in opening zip file
>> >> >
>> >> > And the following is my CLASSPATH variable:
>> >> > .:/net/oracle/ora9/CCISCLASS/sqlj/lib/runtime12.jar:/net/oracle/
>> >> >
>>ora9/CCISCLASS/sqlj/lib/sqljutl.sql:/net/oracle/ora9/CCISCLASS/sqlj/lib/
>
>> >> >
>>translator.zip:/net/oracle/ora9/CCISCLASS/jdbc/lib/nls_charset12.zip:/ne
>
>> >> > t/oracle/ora9/CCISCLASS/jdbc/lib/ojdbc14.jar
>> >> >
>> >> > Is my configurations incorrect?
>> >> >
>> >> > Is anyone else having the same error? Or does anyone know how
>> >> > to fix this?
>> >> > Thanks,
>> >> > Wing
>> >> >
>> >> > _______________________________________________
>> >> > csu540-f05-rpf mailing list
>> >> >
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