NoClassDefFoundError

[Kajos]

Hi,

I'm getting an error trying to use lwjgl.jar, lwjgl_util.jar and the native.jars.

Exception in thread "main" java.lang.NoClassDefFoundError: Cou
ld not initialize class org.lwjgl.Sys
       at org.lwjgl.opengl.Display.<clinit>(Display.java:130)
       at project1.render.opengl.LwjglDriver.setMode(LwjglDriver.java:207)
       at project1.render.fast.Main.R_SetMode(Main.java:1039)
       at project1.render.fast.Main.R_Init(Main.java:1095)
       at project1.render.LwjglRenderer.Init(LwjglRenderer.java:72)
       at project1.client.VID.LoadRefresh(VID.java:214)
       at project1.client.VID.CheckChanges(VID.java:258)
       at project1.client.VID.Init(VID.java:328)
       at project1.client.CL.Init(CL.java:1646)
       at project1.qcommon.Qcommon.Init(Qcommon.java:130)
       at project1.project1.main(project1.java:95)

This is my jnlp file:

<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<jnlp codebase="file:/....etc..." href="launch.jnlp" spec="1.0+">
    <information>
        <title>jake2</title>
        <vendor></vendor>
        <homepage href=""/>
        <description>jake2</description>
        <description kind="short">jake2</description>
       
       
    </information>
    <update check="always"/>
   
    <resources>
        <j2se java-vm-args="-Xmx80M -Dsun.java2d.noddraw=true" version="1.6+"/>
        <jar href="jake2.jar" main="true"/>
       
       
    <jar href="lib/jl1.0.1.jar"/>
<jar href="lib/linux_natives.jar"/>
<jar href="lib/lwjgl.jar"/>
<jar href="lib/lwjgl_util.jar"/>
<jar href="lib/macosx_natives.jar"/>
<jar href="lib/solaris_natives.jar"/>
<jar href="lib/windows_natives.jar"/>
</resources>
    <application-desc main-class="....etc....">
       
    </application-desc>
</jnlp>

I tried categorizing native jars in their respective OS resource tag. Didnt work.

I'm trying it through Webstart. Should I not use the native jars?

Greetings,
Kajos

[kappa]

that error seems to suggest that it can't find lwjgl.jar.

Either way you're using the native jars incorrectly, when using natives in a jnlp you want something like

<security>
   <all-permissions/>
 </security>

 <resources>
   <j2se href="http://java.sun.com/products/autodl/j2se" version="1.4+"/>
    <jar href="jake2.jar" main="true"/>
    <jar href="lib/jl1.0.1.jar"/>
    <jar href="lib/linux_natives.jar"/>
    <jar href="lib/lwjgl.jar"/>
    <jar href="lib/lwjgl_util.jar"/>
 </resources>

<resources os="Windows">
   <j2se href="http://java.sun.com/products/autodl/j2se" version="1.4+"/>
   <nativelib href="lib/windows_natives.jar"/>  
 </resources>

 <resources os="Linux">
   <j2se href="http://java.sun.com/products/autodl/j2se" version="1.4+"/>
   <nativelib href="lib/linux_natives.jar"/>
 </resources>

 <resources os="Mac OS">
   <j2se href="http://java.sun.com/products/autodl/j2se" version="1.4+"/>
   <nativelib href="lib/macosx_natives.jar"/>
 </resources>

[Kajos]

That works, thanks.

Can you explain why it works from webstart but not when I run it as java -jar from the commandline?
It throws me this error:
Exception in thread "main" java.lang.NoClassDefFoundError: Cou
ld not initialize class org.lwjgl.Sys
        at org.lwjgl.opengl.Display.<clinit>(Display.java:130)
        at project.render.opengl.LwjglDriver.setMode(LwjglDriver.java:207)
        at project.render.fast.Main.R_SetMode(Main.java:1039)
        at project.render.fast.Main.R_Init(Main.java:1095)
        at project.render.LwjglRenderer.Init(LwjglRenderer.java:72)
        at project.client.VID.LoadRefresh(VID.java:214)
        at project.client.VID.CheckChanges(VID.java:258)
        at project.client.VID.Init(VID.java:328)
        at project.client.CL.Init(CL.java:1646)
        at project.qcommon.Qcommon.Init(Qcommon.java:130)
        at project.Project.main(Project.java:95)

[kappa]

you can't run your jar on its own since it depends on lwjgl, natives etc, hence you get the error, so instead of "java - jar youjar.jar" you need to use something like the following on the command line

java -cp .;res;jar\lwjgl.jar;jar\lwjgl_test.jar;jar\lwjgl_util.jar;jar\jinput.jar; -Djava.library.path=native\windows

[Kajos]

Okay, makes sense.
And if my LWJGL dependent code is compiled at runtime by the JavaCompiler API, do you know what troubles I might get it? I'm trying it and get errors that it can't find the package of LWJGL.


/sound/lwjgl/Channel.java:43: package org.lwjgl.openal does not exist
/sound/lwjgl/Channel.java:44: package org.lwjgl.openal does not exist
/render/opengl/LwjglDriver.java:37: package org.lwjgl does not exist
/render/opengl/LwjglDriver.java:38: package org.lwjgl.opengl does not exist
/render/opengl/LwjglDriver.java:39: package org.lwjgl.opengl does not exist
/render/opengl/LwjglGL.java:5: package org.lwjgl.opengl does not exist
/render/opengl/LwjglDriver.java:52: cannot find symbol

[kappa]

no idea about JavaCompiler API but i'd guess that its not finding lwjgl.jar (maybe its not on the classpath) hence throwing that error.

[Kajos]

And can I access the LWJGL functions from unsigned code? Assuming the LWJGL libraries are signed?

[kappa]

And can I access the LWJGL functions from unsigned code? Assuming the LWJGL libraries are signed?

yes

[Kajos]

Are you sure? If I can call org.lwjgl.sys.initialize succesfully without exceptions, does that garanty this? Reason I'm asking is because I'm having trouble reaching some other code (System.getProperty) in signed jar from unsigned code.

[CodeBunny]

"System.getProperty" is part of the core JVM libraries, and there should be no way in hell that you can't call it. What do you mean? :/

[Kajos]

I dont have the PropertyPermission when calling it from unsigned code. Even though the getProperty function relies in signed code, it gives me a PropertyPermission exception (when calling from unsigned code). I would figure this should not be the case since it relies in signed code, thats why I asked.

[kappa]

you should also try an accesscontroller around your signed code

e.g.

AccessController.doPrivileged(new PrivilegedAction<Object>() {
			public Object run() {
				return System.getProperty("yourProperty");
			}
		});

[Kajos]

Thanks! Learned something again!