Hi!
I'm experiencing the following problem with JDK pre1.2v2: all JFrames opened
by my program appear without any border (i.e., without title bar and the other
stuff managed by the window manager, Window Maker in my case) java.awt.Frames
work just well.
The program works correctly in 1.1.7v3 and
Hi Daniel!
DPZ>How can I tell how much memory an object takes?
There is an article on www.javaworld.com about this topic (it's about clever
memory usage, I don't know the exact title, but there are'nt so many articles
to choose from). Depending on the VM, java.lang.Object takes some 20-30 bytes
Hallo Riyad,
RK>New release of JDK 1.2.2!
After downloading the 20 MB and installing it (I wonder why it doesn't come as
standard .tgz, but never mind), I just get "Illegal instruction" (without any
other output) when running java oder appletviewer. I'm running a up-to-date
Debian potato system,
Hallo Nathan,
NM>It's clear that the actual bugs prevent the JDK from being fully
NM>supported on the guilty glibc versions (as well they should), but
NM>having some way to
I just want to point at the fact that the actual bug mentioned by me
("Internal error") happens on a current *Debian pot
Hallo Jan,
I'm running an AMD K6-3 400... do egcs (or gcc, whichever was used to compile
the JDK) support Pentium-specific operations (as opposed to pentium-specific
optimizations)?
JB>I tried to run it on a AMD K6-2 450 and it didn't even start up because
JB>of the same error. Maybe, as you sa
Hi,
is it possible to access X things from native code via JNI? E.g., paint in a X
window direktly from native code?
MbG, Ekkehard
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Hallo,
d>I have verified the path to the file, the integrity of the file and
d>changed permissions using 1.2 as a guide. Nothing sticks out.
Perhaps strace helps?
MbG, Ekkehard
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w
High,
I just gave the Inprise JDK and JBuilder a try. Nice-looking stuff, especially
the debugger is just great. Nevertheless, I'll stay with Emacs and makefiles
and cvs...
Ok. However, I noticed that JBuilder (the IDE itself) does not in any way have
problems with its windows under WindowMaker.
Hi,
I have an application that draws a lot of java.awt.Images onto another image,
and then draws the latter one onto the screen (the application does no other
relevant things). It is written for JDK 1.1.x, and runs very smooth under
Blackdown 1.1.7v3 or IBM 1.1.8. Is it normal that the same appli
Hallo Pierre,
PHr>Does anybody know where is the error ?
Did you specify a package for your java file? If you did, then you must call
javah appropriately.
MbG, Ekkehard
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Hello Michael,
MEM>i think the jvm/jdk has a big leak with one or more of the
MEM>classes used.
I'm running the Blackdown JDK (1.2-RC3, with sunwjit and native threads) here
with very good results. I have only one (non-trivial) application running, and
it doesn't show your problem. It uses socke
Hallo Edson Carlos Erickss,
some results for the Blackdown JDK 1.2.2 RC 3, native threads, sunwjit:
It does at least 80.000 loops without problems (I canceled it afterwards);
rt.free() is constantly 1048568 Bytes; the effective memory used by the
program is constantly 4520 K (+1024 K shared).
M
Hallo Michael,
MEM>that is good news.
MEM>i did alot of the same kind of testing.
MEM>i did "new Integer[100]"
MEM>and i never ran out of heap.
I did THAT one, too. I didn't run out of heap, too. But when using "new
Integer(0)" instead, it crashes - mind you, it doesn't run out of heap,
tho
Hallo Nathan,
NM>Blackdown JDK. If you want to use tools that depend on the Java
NM>Platform Debugging Architecture (like JBuilder and other IDEs), you
NM>need the Sun/Inprise JDK.
I just wanted to hint at ddd, which supports a bit of graphical debugging
under Blackdown (without JPDA) as well.
Hallo jack,
jw>Please ask which version of Blackdown JDK
jw>is better in stability,speed,
If you need JDK 1.2, then use JDK 1.2.2 RC3. Else use JDK 1.1.7v3.
MbG, Ekkehard
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Hallo Renzo,
RP>I just accidentally deleted a bunch of my Java source files. Anyone
RP>know a good decompiler that works under Linux?
Try 'jad' or 'mocha'.
MbG, Ekkehard
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Hallo Oliver,
OF>So where is the problem then if that is the purpose of this tool ? :-)
OF>Ever tried running it through itself ?
jad is written in C/C++...
MbG, Ekkehard
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Hello Clyde,
cj>So despite what the install README says; assuming an install
cj>directory of /usr/local/jdk1.2.2, the env variables need to be set to:
cj>
cj>PATH=$PATH:/usr/local/jdk1.2.2/bin:
cj>CLASSPATH=/usr/local/jdk1.2.2/jre/:.
cj>JAVA_HOME=/usr/local/jdk1.2.2
Sorry, this is not correct.
Hello,
the problem which was discussed a while ago on this list is still persistent
with RC4: any program that creates lots (say, 30) of small objects (like
java.math.BigInteger) will eventually segfault.
Just to make sure it doesn't drop off any TODO lists. ;-) Perhaps somebody
could verify
Hallo Lee,
LX>figure out why. I have a feeling that saving JNIEnv and jobject in so1
LX>to global vars may have problem but not sure. Thank you and forgive me
LX>for
I am no expert on .so's, but "global variables" in conjunction with "dynamic
binding" should ring an alarm bell immediately i
Hallo Joseph,
JS>Try using a differnt jit like tya.
This may avert the problem (I tried it and it goes away if sunwjit is switched
off), but it would be better to fix the bug, as long as tya is not the default
JIT.
But I guess that Blackdown isn't allowed to change sunwjit, even to remove
bugs.
Hallo Lee,
LX>so2 in either t1 or t2 thread context, so2 always uses the second
LX>thread t2's *JNIEnv to call back to java. But we need so2 call back to
LX>so1 then
As said before: try it without global variables. Even if everything works
correctly for one thread - as you noticed, the JNIEn
Hello,
I would like to run a java program as at-job. This works OK, but the program
needs to manipulate (not display) some Image objects, thus initializing the
AWT, and this fails, because in a at-job there isn't necessarily a valid
DISPLAY variable (and no X display, of course). So the program c
Hello Nathan,
thanks! That is exactly like the thing I needed. And it works just absolutely
smooth in the default configuration. Just "Xvfb :15 ; export DISPLAY=:15", and
everything is fine...
NM>Xvfb is available wherever XFree86 is sold.
Or on any fine Debian package server. ;-)
MbG, Ekkehar
Hallo Nelson,
NM>For what it's worth, I was always happy with how JDK worked under
NM>WindowMaker.
Except that the JDK *always* crashes my WindowMaker if I call
setResizable(false) on a frame. OK, nowaydays WindowMaker will at least
recover gracefully and restart (not taking all applications wi
Hallo John,
JR>I'm thinking that the kernel TCP connection queues are filling up and
JR>further requsts are getting dropped, but at 20?
Did you check ulimit (file handles)?
Did you try 'lsof | grep TCP'? Maybe it shows thousands of "zombie" TCP/IP
connections.
Which JDBC driver are you using
Hello,
I've been asked by a friend whether Blackdown 1.2.2 RC4 will run on a stock
SUSE 6.3 distribution. I would assume that it works, but I'm running Debian,
and the guy will only install SUSE *if* Blackdown runs there, so both of us
are unable to test it. My java-linux archive only contain hin
Hallo Kaspar,
KF>It's about the same size as yours. And I get similar results, about 10
KF>fps. My problem is the following, though. I'd like to do ALL my
KF>drawing offscreen, even some things for the user interface (eg.
KF>adjusting a Bezier-curve handle). I know this sounds stupid, but
KIRKBRIDE Rob wrote:
>
> Thanks a lot for the info yes it was the JDK optimizer I was interested in
Oh, you mean "javac -O"? I'm afraid that's not very useful speed-wise. I
have never noticed a noticeable speed difference between -O and not -O
with the Blackdown JDK, but on the other hand I have
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