sigh

[bedelf]

java.lang.UnsatisfiedLinkError: no lwjgl in java.library.path

What the fuck is that.

Seriously.

I have lwjgl.jar added to the classpath. What does it want from me? Can a jigga get a install.txt?

[princec]

That’s the DLL it’s looking for.

Add -Djava.library.path= to your commandline. Or simply ensure that the lwjgl.dll is in the current working directory when you fire up a jar, say. Don’t forget to put OpenAL32.dll in there as well if you’re doing sound.

Cas

[bedelf]

I couldn’t get the command line to work in eclipse for whatever reason ( Edit: yay i got it working in eclipse ) so I just put the .dlls in the dir.

Now I get -

java.lang.Exception: The keyboard could not be created.
at org.lwjgl.input.Keyboard.create(Unknown Source)
at Test2D.init(Test2D.java:116)
at Test2D.main(Test2D.java:70)
No window

• with my code. Least were moving forward here.

Thanks cas.

[Matzon]

[quote] java.lang.Exception: The keyboard could not be created.
at org.lwjgl.input.Keyboard.create(Unknown Source)
at Test2D.init(Test2D.java:116)
at Test2D.main(Test2D.java:70)
No window
[/quote]
Well that is actually a good exception message - the error:
No Window

You need to create a GL instance (which inherits from Window) BEFORE creating the Keyboard.

[bedelf]

My GL creation isn’t throwing any exceptions and it’s being created before the keyboard. My code is like a copy of what’s up on the LWJGL page modified for .6.

Do you see anything wrong with this line?

gl = new GL( “Test2D”, 0, 0, 640, 480, 16, 0, 0, 0 );

[Matzon]

are you calling gl.create() too?

[bedelf]

Oh crap. Well, problem is, I read a post explaining the changes (i think it was acually from you) and I for whatever reason just assumed that was a complete change and it was the ONLY thing I had to do. My bad.

You guys really need to update your page.

Edit: Sonofabitch. Now it works. Thanks.

[Matzon]

[quote]You guys really need to update your page.
[/quote]
Indeed, but Real Life is intefering sometimes :-/

One of my main goals for 0.7, is a general cleanup in the API and documentation (or lack thereof)

[bedelf]

No plan survives first contact with Real Life ™.

[psiegel]

Just thought I would note that you can also drop the dlls into \jre\bin or your windows system directory and any code you write will be able to find it. This allows you to skip the -Djava.library.path and/or copying the dlls from one project to the next.

Of course, you’ll still have to be aware of what to do with the dlls when you redistribute, in which case simply keeping them in the same directory as the jar file is probably preferable to dropping them into a system directory.

[princec]

I strongly advise not doing this though, as you’ll be in for a world of pain and incompatibility. Just plonk the dlls in the same place as your current project and use the -D. It’ll save you grief later, when we break the API

Cas

[psiegel]

We’re already in a world of pain and incompatibility when you break the API. What’s one more step of copying the dlls?

I guess I don’t mind replacing the entire lib system wide like this since it’s exactly what I have to do in Linux anyway. There’s no “just drop the .so into the same directory as the jar” there yet. (And I strongly hope the emphasis there is on the yet.)

[bedelf]

Should I be able to export my project to a jar in eclipse, copy lwjgl.dll to the dir where the jar is, and then be able to just double click the jar?

Double clicking it seems to have no effect right now.

[psiegel]

In order to have a jar file do something when you double-click it, you have to set the “Main-class” property in the manifest. Now, I’m not sure how eclipse builds jar files, I usually do mine by hand or use Ant. Anyway, here’s a little reference on what I’m talking about:

http://java.sun.com/docs/books/tutorial/jar/basics/run.html

Look towards the bottom for the section labeled “Jar files as applications”.

-Paul

[bedelf]

Main class is set. It’s in the last dialog of eclipse’s export thingy. That’s why I’m a bit confused that I’m getting nothing. I tried it 2 times making SURE that was set.

Edit: Lemme just say that I have exported to jar files before and everything worked great, but the only difference I see here is the lwjgl stuff.

But I’m an idiot so who knows.

[psiegel]

Unfortunately double-clicking the jar file doesn’t give any output when something goes wrong. Try opening a dos prompt to the directory and using the command:

java -jar myjarfile.jar

This is pretty much the same as double-clicking, but hopefully any errors will spew out onto the screen instead of being hidden.

[Mojomonkey]

bedelf:

Just for clarification, are you trying to double click the lwjgl.jar or a jar with your code that you generated?

[bedelf]

Oh, duh.

C:\Test2D>java -jar Test2d.jar
java.lang.NoClassDefFoundError: org/lwjgl/opengl/GL
at Test2D.init(Test2D.java:103)
at Test2D.main(Test2D.java:37)
Exception in thread “main” java.lang.NoClassDefFoundError: org/lwjgl/input/Keybo
ard
at Test2D.cleanup(Test2D.java:124)
at Test2D.main(Test2D.java:49)

Now the question is, what’s the best way to solve that.

Edit: acually lemme rephrash, I guess my question is, if I was gonna send my jar to someone else, whats the easiest way for them to get this working.

[jbanes]

Two options:

1. Plop lwjgl.jar into /lib/ext where is the JRE directory. (i.e. c:\Program Files\Java\1.4\lib\ext or c:\j2sdk1.4\jre\lib\ext)

2. Use the snazzy manifest features! Simply create a Manifest like this:

Main-Class: com.whatever.MyClass
Class-Path: lib/lwjgl.jar lib/timer.jar

Then package your Jar with “jar -cvmf mymanifest.mf myjar.jar com/whatever/*.class”

For distribution, you should create a zip file with a packing list simialr to this:

myjar.jar
lwjgl.jar
lwjgl.dll
openal.dll

That way when they unzip it, they can simply double click on myjar.jar. The Shooter example over on the GAGE homepage uses this. You could even pack your program into an NSIS installer and have it automatically generate start menu icons to your JAR file. Just make sure you set the working directory right or it won’t be able to find lwjgl.jar.

[bedelf]

I’m not having any luck so far, I keep getting

Failed to load Main-Class manifest attribute from
Test2D.jar

But it’s in there, tried it 100 ways. I’m looking at the Manifest docs but it’s not telling me anything I don’t already know.

Has anyone done this from eclipse?