Re: Java debugger ?

1999-05-19 Thread Larry Gates


I use the JDE with XEmacs also.  Very nice after you get used to it,
but there's much to be improved.  Glad to hear someone else has
compared it with another debugger.  I also like the way it changes the
colors of comments vs. code vs. method names etc... you have to see
it, I guess.

>From: [EMAIL PROTECTED]

>There are a couple I've used:
>
>JDE - a java development environment for Emacs.  Pretty good if you like Emacs.
>(almost enough to get me to switch :-).  It uses the JDK debugger.
>
>Jikes Debugger - I found it useable, but not great.  From IBM AlphaWorks.


>Hi
>
>Is there such a beast (running on linux) ?
>
>Thanks
>--
>Mario Filipe


-- 
Larry Gates, Ph.D. |  
MRI Physicist, Diagnostic Imaging Dept.|  
QEII Health Sciences Centre| For every action, there is an 
VG Site, 1278 Tower Rd.| equal and opposite criticism. 
Halifax, N.S. B3H 2Y9  |   
===


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Re: Slackware

1999-06-03 Thread Larry Gates


Rod MacKinney wrote:

>Everyone seems to be using RedHat
>Can I used Slackware?
>If not, why not?
>If so, which versions are required?

???
Yes. I have 2 Linux machines running Slackware 3.6 (glibc) on which I use
the jdk117_v1a.  I plan on switching to jdk 1.2 soon.  (or maybe not
with all the doom stories being posted recently... ) :)

Larry Gates


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Re: Swing on Linux

1999-06-11 Thread Larry Gates


>I've just started looking at using Swing for my Java project. It seems
>really really slow. Is anyone here seriously using Swing under Linux,
>without a JIT? Is there some way to improve things? Do JITs make
>enough difference to make it bearable?

Question: doesn't java 1.2 include the swing classes?  If you're
"just start"-ing to look at swing, why not start with java 1.2 instead?

thanks,

Larry Gates

ps: not suggesting this will fix your speed.


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Re: JDK 1.2 for Linux on Sparc

1999-06-28 Thread Larry Gates


>From: Steve Byrne <[EMAIL PROTECTED]>
>Date: 27 Jun 1999 20:12:54 -0700

>> Hi everybody,
>> 
>> I have in my Office an Sparc 5 running Linux.
>> Now I want to use this machine for programming in Java.
>> 
>> So I'm looking for JDK 1.2 for that machine.
>> Is there already an beta-version available for sparc-linux.
>> 
>> If there is one, I would appreciate any hints, where to find it.
>
>It's in progress.  It's had some difficulties running more than just one
>Linux version, but those are being straightened out.
>
>I don't want to make any commitments for the guys doing the port, but
>it's getting better all the time, and may be releasable soon.
>
>Steve

I have a Sparc Ultra 1 which I would like to run Java programs on.
I am awaiting its release as well.  Thanks guys.

Larry Gates


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Re: Java IDE

1999-06-30 Thread Larry Gates


>> I'm having problem finding a Java IDE for Linux I like, and I thought
>> I should give it a try and ask here. What is everyone here using to
>> develop their classes in Linux? I'm used to KAWA for Win32, but now
>> after switching to Linux I've been unable to find a good replacement.
>
>I like jde.  It is very intuitive for those who know emacs --- and
>the greatest advantage for me is to use emacs as the IDE's editor.
>
>Sergio

I echo Sergio's comments.  I use the JDE for all java development and
debugging with the Xemacs editor.

-Larry Gates


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Re: javacomm

1999-07-05 Thread Larry Gates


>Date: Sun, 04 Jul 1999 22:22:22 -0700
>From: Kevin Ryan <[EMAIL PROTECTED]>

>The Sun comm API stuff is at:
>   http://java.sun.com/products/javacomm/index.html

It says to "choose a platform".  Which one do we choose for Linux?

-Larry Gates


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Re: which jre for Redhat 6

1999-07-07 Thread Larry Gates


>X-Sender: [EMAIL PROTECTED]
>Date: Wed, 07 Jul 1999 14:33:00 +0100

>Hi Folks
>
>Having downloaded 40MB of various versions of the jdk and jre for linux
>from Blackdown I've failed to get it to work on Redhat 6.

why have there been so many of these reports?  Is it Redhat?

>When I try to run any java app (using the full path to the java script and
>the app) using 2rpe-v2 I get the message:

recommend NOT using the full path to the app. (but invoke from the
same directory).

>The second produces the message:
>
>/lib/i586/green_threads/libjava.so: undefined symbol: _ld_symbol_value 

??? maybe your system is libc5, and not glibc.

>whether I try to invoke the jre on its own or with an app as an argument.
>I've run the script to generate the paths.
???

>After nearly a week on this I'm not convinced about Java on linux at all,
>though Netscape seems to manage. It's all highly frustrating - especially
>when certain clever clogs keep telling me it's trivial to make it work :)

:)RL 
Netscape, I find, doesn't manage well at all.  Java 1.1.7v1a
works very well on Linux, but I can only speak for Slackware's version.
Truly, my experience is that it IS trivial to install: just follow the 
directions in the README.linux file: especially the part about getting 
the right version glibc/libc5.

try again with a fresh Linux install, maybe? good luck.

-Larry Gates


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Re: How to detect a "blank" line.

1999-07-08 Thread Larry Gates


>Date: Thu, 08 Jul 1999 12:48:49 +0200
>From: Matthias Pfisterer <[EMAIL PROTECTED]>
>
>Hi,
>
>In your java program, exchange the line
>   if (s1.charAt(0)!='#') { // not a comment or NULL line
>with
>   if (s1.equals("") || s1.charAt(0)!='#') { // not a comment or NULL line


or it could be a return character? Then, you would need

if (s1.equals("\n") || s1.charAt(0)!='#') { // not a comment or NULL line

-Larry Gates


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Re: Has Sun Overstretch Themselves With So Many APIs?

1999-07-09 Thread Larry Gates


>Date: Fri, 09 Jul 1999 07:02:02 -0400
>From: "Thomas M. Sasala" <[EMAIL PROTECTED]>

>   Perhaps it takes a large API to reproduce something Apple, Microsloth,
>Sun, HP, etc. have been working on for 20 years.
>
>   FWIW, I don't think the API has anything to do with write once, 
>run noum, any where.  Clearly Microsoft has been able to turn
>Java in to a platform specific language with little help.

2 things:

Hey, I thought the consensus was that Visual J++ was NOT Java, even
though Microsquash was calling it Java.  Which in turn, prompted one
of many suites filed by Sun?  Did I get this right?  Anyone know how
the lawsuit is coming along?  

I think we all hope that someday "write once, run anywhere" will be a
true statement about Java.

-Larry Gates

>   -T
>
>jools enticknap wrote:
>> 
>> >I am wondering if Sun has overstretch itself in trying to develop so
>> >many APIs? It seems to me that they are struggling and there is enough
>> >support and help to help outsiders (like Blackdown who done an excellent
>> >job porting the software)?
>> 
>> 
>> 
>> Perhaps this is a direct result of trying to bring an open technology to
>> market, and at the same time protect the one thing that makes Java useful in
>> the first place (write once, run everywhere(TM)).
>> 
>> Also once a technology is invented it needs time for the comunity to
>> evaluate and comment on whats been done, and these comments must also be
>> evaluted and the next step then taken.
>> 
>> This all takes time, however I for one and happy this does take place.
>> 
>> As for porting assistance, I think that you will find that SUN has __very__
>> close links with the blackdown guys and do offer help when it's requested.


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Re: java.lang.OutOfMemoryError

1999-07-12 Thread Larry Gates


>Date: Mon, 12 Jul 1999 13:12:45 +0200
>From: [EMAIL PROTECTED] (Luigi Giuri)

>At 11.21 12/07/99 +0100, Nick Lawson wrote:
>>In JDK 1.2 the default max heap size is 16 Mb - I can't remember what
>>it was in 1.1. Is this your problem ? 
>
>Yes !!!
>
>>You can specify a larger heap
>>with the command line option -Xmx32m, for example.
>
>Right, there is only a little syntax error: the option is -mx32m.

interesting feature.  What is the rationale behind the idea of a heap
size?  Whynot just use whatever RAM is available?

-Larry Gates


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Re: Cut-n-paste?

1999-07-30 Thread Larry Gates


>From: Jan-Henrik Haukeland <[EMAIL PROTECTED]>
>Date: 29 Jul 1999 17:36:06 +0200

>Larry Gates <[EMAIL PROTECTED]> writes:
>
>> I, too, can get cut-n-paste via Netscape's "Edit/Copy" menu, and then
>> use Java's java.awt.datatransfer.Clipboard method as described in a
>> past document on the Java Developer Connection.  This is nice, but I
>> can't paste a highlighted text portion from the mouse, which we Linux
>> users all like to do. 
>
>As mentioned elsewhere there are two clippboards, the system (primary)
>and a secondary used by the mouse. To merge these, have the following
>lines added to your .Xresources file.
>
>  *VT100.Translations: #override \
>   Button1 : select-end(PRIMARY,CUT_BUFFER0,CLIPBOARD)\n\
>   :insert-selection(CLIPBOARD)\n\
>   : insert-selection(PRIMARY,CUT_BUFFER0)
>
>-- 
>Jan-Henrik Haukeland

Thanks Jan, but I put this in my .Xresources file (I had to create
one) and there was no change in the mouse-cut-paste-java-clipboard behaviour.

I also tried it in /var/X11R6/lib/xdm/Xresources, but no luck.

My system is Slackware 3.6, fvwm2, XFree86, jdk_1.1.7.  

Could you tell me what the 3 lines are supposed to do?  i.e. why do we
need 2 "insert-selection" lines?  Where is the "As mentioned elsewhere"?

Are there not 3 clipboards? PRIMARY,CUT_BUFFER0, and CLIPBOARD?

"man xclipboard" gives code similar to yours, but some differences.

cheers,

-- 
Larry Gates


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Re: Cut-n-paste?

1999-08-02 Thread Larry Gates


>Date: Sat, 31 Jul 1999 15:12:11 -0700
>From: Nathan Meyers <[EMAIL PROTECTED]>

>This discussion inspired me into a burst of frenzied activity, and I've
>written a simple JNI-based solution. Check out XClipboard at
>http://www.teleport.com/~nmeyers/FreeWare/

It works!!

Nathan, this is absolutely amazing!!!  Exactly what I had in mind.  
Wow! what an excellent newsgroup!!!

I was able to call the method readPrimarySelectionString() without a
problem.  The additional code to my program is only 3 lines: the
"import util.nmeyers.XClipboard;" statement, then these 2 lines within
one of my methods:

XClipboard xc = new XClipboard();   
String clip = xc.readPrimarySelectionString(); 

I decided to put your libXClipboard.so in /usr/local/lib, and then
globally include this path in LD_LIBRARY_PATH by specifying it in
/etc/profile.

The Makefile worked well on my Slackware 3.6, jdk117_v1a system.

As you said, there's a 2nd half to this problem: passing data from
XClipboard.java to XClipboard.c and then putting it into the PRIMARY
clipboard. 

It's funny that there's no way to do this without JNI.  If you use
a TextArea class, it will accept paste-ing with the mouse, so somewhere
within the bowels of the JVM, it must be reading the primary clipboard.

>XClipboard handles the problem of getting the pasted bits from X.
>Calling it from a mouse action is left as an exercise to the reader :-).
>
>Nathan

great program, Nathan.  This should be posted on the blackdown website
under "3rd Party Projects and Packages".

-Larry Gates


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Re: How can I help?

1999-08-04 Thread Larry Gates


I can't let this go unanswered... :)

>Date: Tue, 03 Aug 1999 10:02:19 -0700
>From: Danny Trieu <[EMAIL PROTECTED]>

>Me too, I would like to contribute to the Linux community, and how can I help?
>
>Mike Christiansen wrote:
>
>> I have wanted to contribute to Linux for a while now. I would most like
>> to help make my favorite programming language successful on my favorite
>> OS. What can I do?
>>
>> Mike

I don't believe there are any free .MPEG, .avi, or .vivo players
available (mtv has the annoying "register" popup all the time).  A
Java class to do this would be really slick.  Also, I don't think
there are any open source Java classes to load .tiff or .pnm formats.

A *real* hard project is to develop a class to load postscript format
files.

You would 1st need to find out exactly what the formats are.  I don't
know where to find the format specifications for .MPEG, .avi, .vivo,
.tiff or .pnm, but they must be somewhere on the web.  Postscript
specs are probably available on the web too and I know there are books
specifying its format.  Perhaps someone knows of a good book with all
the specs?

my $0.02.

-Larry Gates


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Re: How can I help?

1999-08-04 Thread Larry Gates


Here's another "project" that should be easy with Java, yet very 
much needed (at least by me, unless someone knows of a good
alternative to Ncftp):

>> I can't let this go unanswered... :)
>> 
>> >Date: Tue, 03 Aug 1999 10:02:19 -0700
>> >From: Danny Trieu <[EMAIL PROTECTED]>
>> 
>> >Me too, I would like to contribute to the Linux community, and how can I help?
>> >
>> >Mike Christiansen wrote:
>> >
>> >> I have wanted to contribute to Linux for a while now. I would most like
>> >> to help make my favorite programming language successful on my favorite
>> >> OS. What can I do?
>> >>
>> >> Mike

I've always wanted a GUI driven FTP program just like CuteFTP for windows98.

I have my hard drive partitioned for windows98 + Linux.  When I need
to download my experimental data from our Sparc II (SunOs) computer,
it typically consists of about 7000 files totalling 200MB of data.  I
ALWAYS reboot to windows98 to transfer this because Ncftp (or regular
Linux ftp) will give an "Arguments too long" error when I transfer with the
command mget *.*.  (It must be expanding the wildcard and
can't handle the load of 7000 arguments...).  Another piss-off from
Ncftp is it will sometimes hang during mid-transfer with a 
"
Error: Remote host has closed the connection.
(Interrupt the program again to kill program.)
"

With CuteFTP, you can select which files you want (I've even selected
over 10,000 files at once before), start the transfer and go for lunch
(or whatever), when you return, its done without any complaints or
excuses.  I've NEVER had it fail.  This is what I want from the Linux end.

So, I think the Linux community needs a better, GUI driven FTP
program in the style of CuteFTP.  Java is well suited to develop this. 

-Larry Gates


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Re: How can I help?

1999-08-04 Thread Larry Gates


>Date: Wed, 04 Aug 1999 07:48:54 -0700
>From: Matt Sexton <[EMAIL PROTECTED]>

>For what it's worth, I've written a Tiff reader in Java.
>
>I'd love to 'contribute' it.  It would be my first work.  Where do I
>read about how to make it available to anyone who cares?

I'll take it when it is available.

Moses DeJong <[EMAIL PROTECTED]> writes:
>Check out these sites.
>
>http://rnvs.informatik.tu-chemnitz.de/~ja/MPEG/MPEG_Play.html
>http://209.223.115.151/development/

ok, I will. thanks.

-Larry Gates


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Re: How can I help?

1999-08-18 Thread Larry Gates


>Date: Tue, 17 Aug 1999 21:48:11 +
>From: Steve Fink <[EMAIL PROTECTED]>

>> So, I think the Linux community needs a better, GUI driven FTP
>> program in the style of CuteFTP.  Java is well suited to develop this.
>
>ncftp> get -R 
>will do it, if you want all the files in one directory.

yeah, but I don't.  BTW, many people advised on using gFTP, WXftp, IglooFTP,
as alternatives, even a java FTP bean.  I haven't checked these out
yet but I will, I will...

>With ncftp, you might try get *.* instead of mget. I don't know
>if it'll do any different than mget, though. Probably not.

Nope.

>I can't test, because I can successfully mget 15000 files on my machine

this is interesting.  Are you using a special shell?  I just use the
default bash shell provided with Slackware 3.6, which is a fairly
recent distribution.  I have encountered "arg list too long" errors on
other uses than ftp as well, but I always have a
work-around... (except my work-around for Ncftp is to reboot to
windows98 :)RL ).

>with no problems (maybe it's sh on Solaris that's dying?). But there's
>always 
>
>ssh foo 'ls | grep "^" | tar -cf - -T -' | tar -xf -

! good lord... :)

>Personally, I can't stand GUI ftp tools. But if you want them, try a
>search on freshmeat.org. I'm sure they'll have half a dozen.

their website isn't up yet...

>(and you seem to be a native DOS/Windows user. You sure you mean

That's a dangerous thing to say to a devout Java-Linux newsgroup
reader!

just kidding... I ain't offended.  I love linux, but there are many 
instances where linux lets me down.  I use what works, and if this
means using Win98, then so be it.

>*.*? * is more likely what you want, unless you really
>do want to be sure there's a period somewhere after the prefix.)

yup, I want the period.  But, * should work too.  we're
skinning cats here...

thanks,

-Larry Gates


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Re: Problems installing JDK 1.1.7 and JDK 1.2 pre-v2

1999-08-23 Thread Larry Gates


>From: "Dimitris Terzis" <[EMAIL PROTECTED]>
>Date: Mon, 23 Aug 1999 14:53:03 +0100

>Hi guys...
>
>I have finally managed to install JDK1.1.7_v1a and JDK1.2... You won't

>What happened is that, to download the tar files, I used an NT machine,
>linked to my Linux PC via Samba. So far so good. But, being lazy in typing
>"tar -xvf" under Linux, I used WinZip to un-tar and then copied the
>extracted files into the Linux JDK directory (1.1.7 or 1.2, respectively)
>directly. Well, I don't know why (please somebody explain), but with this
>procedure I kinda "lost" files during the WinZip extraction!!! The jdk/bin

kinda?  If they weren't really lost, but corrupted, I've had the same
"experience".  If you don't set the "TAR LF to CR/LF Translation" to
off within WinZip, any ascii files within your tar-file will be
changed.  The default is set to ON in WinZip (unfortunately).

-Larry Gates


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How can I help stuff...

1999-09-21 Thread Larry Gates


Not too long ago, there were 2 volunteers wanting to know how they can
help the Linux-Java community and I responded (among many examples)
that a Postscript viewer would be a neat, but tough java project.  In case
anyone started this, better check this out:

On Thu, 12 Aug 1999 08:17:59 -0400 (EDT), 
[EMAIL PROTECTED] (Nelson Minar) wrote

>>I can't believe that I can't create images on dedicated Web server and send
>>it to clients over http response if I don't run X!!!
>
>The Java image stuff is fairly poor. Various people have written
>libraries to do graphics without AWT. One that looks interesting is
>Jef Poskanzer's, over at http://www.acme.com/
>
>  [EMAIL PROTECTED]
>.   .  . ..   .  . . http://www.media.mit.edu/~nelson/

apparently, Jef's site claims "JavaSoft and Adobe are said to be
working on a 2-D rendering API similar to PostScript", so I would find
out more about this before re-inventing the wheel.

-Larry Gates


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Re: NT app does not display text on Linux with jre 1.2

1999-11-17 Thread Larry Gates


>Date: Wed, 17 Nov 1999 10:56:05 +0200
>From: Vincent Risi <[EMAIL PROTECTED]>

>I have some apps that run on NT using swing. When I run these on Linux
>6.1 with jre1.2v2 I get a warning
>
>Warning: Cannot allocate colormap entry for default background.
>
>and the text does not display for the apps. (The text for the title does
>however). Is there a Linux setting that I have that is wrong?
>
>Vince

I absolutely HATE this error!!!

It occurs because you're running your X server with an 8 bit color
depth AND you've got another application (like netscape) hogging the
colormap.

Solution 1: kill all other apps, and rerun your java app.

Solution 2: rerun X with 16 bits (ie. startx -- -bpp 16)

#2 would seem to be the best but it isn't because many apps will not
work properly unless its in the 8-bit "Pseudocolor" model.  Why this
should be still astounds me: is it bad programming? or is it just
"old" programming?  I'm sure there is a complicated answer...

hope this helps,

-- 
Larry Gates


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Debugger: was Re: Insurmountable hurdles with JBuilder installation

2000-02-02 Thread Larry Gates


On that note, does anyone know of a Java-Linux debugger that is
capable of "watching" a variable?  i.e. I want the code to break when
the specified variable is accessed, or changed, then show me the line
of code responsible.  thanks.

-Larry Gates

Riyad Kalla writes:
 > AnyJ ( www.netcomputing.de ) is a very versatile IDE. The
 > current version for Linux is 1.32 I believe, but a 2.0
 > release is on its way and its going to have some INCREDIBLE
 > things in it. Of course its free for use under Linux which
 > is nice, and you can specify a different JDK on a
 > per-project basis which is also nice. The one thing you do
 > need is a 1.1.x JRE to launch it with, I would suggest
 > IBM's. It also supports things like syntax-highlighting,
 > auto-indentation, intellisense, autocompletion, real-time
 > java-doc lookup of class/method you are currently working
 > with, real-time class indexing of your project so your
 > methods/etc get added to the autocomplete/intellisense
 > quickly and are ready for use.
 > 
 > Stuff like that, really handy.


 > Riyad Kalla
 > General Partner, Multimedia & Design
 > [EMAIL PROTECTED]
 > http://www.transitivesys.com


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JDB hangs-up 1.3.0-FCS

2001-01-02 Thread Larry Gates


Just to add my gripe on the NON-functionality of the j2sdk1.3.0 debugger:

It hangs as well on my Slackware 7.1 system: glibc-2.1.3.

I also upgraded my Xemacs version and I can't get JDE to work like it
used to: it hangs (obviously with j2sdk1.3.0) with the jdk1.2.2-RC4 also.

So what do linux-java developers use for debugging now??  We can't
stick with the jdk1.1 because we miss all those cool JMF and JAI classes.

Larry

Re:
Joaquin Rapela writes:
 > I am having troubles with jdb while using: 
 > 
 > RedHat 6.2, Java HotSpot(TM) Client VM (build Blackdown-1.3.0-FCS, mixed mode). 
 > 
 > When I run "jdb Test", where Test is a simple class, I get the 
 > "Initializing jdb ...". 
 > 
 > When I type "run" I get:
 > 
 > > run
 > run Test
 > >
 > VM Started:
 > 
 > and jdb hangs up there.

and 

"Netbeans debugger not working with JDK1.3"
tino writes: 
 > Because you approached this subject , may I ask please :
 > Does the java debugger(j2sdk1.3, blackdown ) work at all on Linux platform
 > (Debian Potatoe) ?
 > 
 > What happens is that jdb get frozen.If  run "threadlocks" this is the
 > retrieved message.
 > 
 > VM Started: threadlocks
 > Internal exception:
 > java.lang.NullPointerException
 > at
 > com.sun.tools.example.debug.tty.Commands.commandThreadlocks(Commands.java:15
 > 19)
 > at com.sun.tools.example.debug.tty.TTY.executeCommand(TTY.java:431)
 > at com.sun.tools.example.debug.tty.TTY.(TTY.java:625)
 > at com.sun.tools.example.debug.tty.TTY.main(TTY.java:924).
 > 
 > I asked the same question on Debian mailing list , but no answer.
 > Can anybody please guide me please , haw to make jdb work ?
 > 
 > Thank you for your participation.
 > Florentin


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Re: anyone have java118 working on slackware7?

2001-02-15 Thread Larry Gates


I'm glad someone asked this.  I got the same error on Slackware 7.1, and gave up.
The same error occurs with jdk117v3 also.  I ended up porting my code to
j2sdk1.3, which works (albeit sound in the JMF is horribly unstable, but that's
another story).

Larry

Geduldig, Jonas writes:
 > Does anyone have java118 working on slackware7?  I get the same error
 > message as a previous email described (see below).   Someone suggested
 > a missing en_US locale, but I checked mine and it was okay.
 > 
 > BTW, java130 and java116 work fine.  And I also tried IBM's java118 which
 > produced the same error message as with Blackdown's 118.
 > 
 > I would really like to get java118 working.  Any help is greatly
 > appreciated.
 > 
 > Jonas
 > 
 > > > I'm sorry if this is a silly or always-repeated question, but I
 > didn't
 > > > find any reference in the faq, and I really need urgently a
 > solution.
 > > >
 > > > The problem is, I'm trying to run jdk-1.1.8-v3-glibc-2.1.3 with
 > my
 > > > Slackware-7.0 linux distribution (glibc-2.1 based!). It's not
 > possible for
 > > > my to use newer versions, I need this one.
 > [..]
 > > > zapl:~$ /opt/jdk118_v3/bin/javac
 > > > SIGSEGV   11*  segmentation violation
 > > > stackbase=0xb198, stackpointer=0xb060
 > [..]
 > > > *current thread*
 > > > java.lang.System.initializeSystemClass(System.java)
 > 
 > You are missing the en_US locale, which the VM depends upon for
 > character translation.  I'm not sure of the best way to install
 > it for Slackware (i.e. what package contains it).  Typically 
 > your locales will live in /usr/share/locale/* or /usr/lib/locale/*
 > and you need to get en_US/ in there.


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