I'm trying to start my java game but I have some troubles with the java command line:
Here is what I type:
C:\>java -Djava.library.path=%cd%\lib -jar game.jar
And here is what I got:
Exception in thread "main" java.lang.NoClassDefFoundError: org/lwjgl/LWJGLException
at com.game.Main.main(Main.java:7)
Caused by: java.lang.ClassNotFoundException: org.lwjgl.LWJGLException
at java.net.URLClassLoader$1.run(Unknown Source)
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
... 1 more
I can start my game with Eclipse (With Run as Java Application) but after the menu I got the following error:
Exception in thread "Thread-5" java.lang.UnsatisfiedLinkError: no lwjgl in java.library.path
at java.lang.ClassLoader.loadLibrary(Unknown Source)
at java.lang.Runtime.loadLibrary0(Unknown Source)
at java.lang.System.loadLibrary(Unknown Source)
at org.lwjgl.Sys$1.run(Sys.java:72)
at java.security.AccessController.doPrivileged(Native Method)
at org.lwjgl.Sys.doLoadLibrary(Sys.java:65)
at org.lwjgl.Sys.loadLibrary(Sys.java:81)
at org.lwjgl.Sys.<clinit>(Sys.java:98)
at org.lwjgl.opengl.Display.<clinit>(Display.java:129)
at com.game.displaygui.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
lwjgl.jar has been put into the folder \lib.
Could you explain me with I got that?
Thanks.
This because lwjgl library is made by two components:
the .jar file which contains Java code
and the native binary library (which can be .so or .dll or .dylib according to your OS)
The first error you are getting is because you are setting the library path, that should contain the native library, but it does contain the .jar. So you get a java.lang.NoClassDefFoundError because you should set either the library path to the folder that contains native library, either the classpath to contain the real lwjgl.jar file.
The second error that you get with Eclipse is a successive step: your classpath contains the jar library but it is not able to find the native library attached to it, you can fix it in the following way:
You should specify explicitly which lib files to include (seperated by ;) :
-cp %cd%\lib\lwjdl.jar;%cd%\lib\<another-lib>.jar
Don't be tempted to use the wildcard * as it will cause more harm than good (from previous experience :))
You use the java.library.path option to specify the location of native libraries to load. In the location pointed to by that option you would place all dll or .so files required by LWJGL. On the other hand, you need to make sure that all required JAR files are on your classpath, via the -classpath option. Currently, you have your JAR files in the wrong directory.
In Eclipse, if you using maven.
Add the following to the project "Run" : "VM options" .
-Djava.library.path=yourpath/youproject/java/target/natives
Related
I asked a question earlier here: NoClassDefFoundError with bluecove's javax.microedition
but got no responses.
I am trying to run some java code (Server.java) that requires bluetooth, so I installed the bluecove-2.1.0.jar file in C:\Program Files\Java.
I compile my code with javac -cp "C:\Program Files\Java\bluecove-2.1.0.jar";. Server.java and run it with java Server -cp "C:\Program Files\Java\bluecove-2.1.0.jar"
It compiles successfully, but when I run it, I get the error:
Error: A JNI error has occurred, please check your installation and try again
Exception in thread "main" java.lang.NoClassDefFoundError: javax/microedition/io/Connection
at java.lang.Class.getDeclaredMethods0(Native Method)
at java.lang.Class.privateGetDeclaredMethods(Unknown Source)
at java.lang.Class.privateGetMethodRecursive(Unknown Source)
at java.lang.Class.getMethod0(Unknown Source)
at java.lang.Class.getMethod(Unknown Source)
at sun.launcher.LauncherHelper.validateMainClass(Unknown Source)
at sun.launcher.LauncherHelper.checkAndLoadMain(Unknown Source)
Caused by: java.lang.ClassNotFoundException: javax.microedition.io.Connection
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
... 7 more
Any ideas where i've gone wrong?
EDIT: Following Minus' answer, to fix the error that followed, I also needed to use a different .jar file which I downloaded from http://snapshot.bluecove.org/distribution/download/2.1.1-SNAPSHOT/2.1.1-SNAPSHOT.63/
The problem is that the .dll is not loaded correctly.
The library should contain a .dll that will be saved on disk and loaded, maybe the program cannot save the .dll to disk or cannot read it.
Extract the .dll and follow bluecove installation instructions on Native Library location.
For example:
Create a directory c:\blue, and a directory blue\lib.
Put the files like this:
C:\blue\Sever.java
C:\blue\Sever.class
C:\blue\[bluecove_native_library].dll
C:\blue\lib\bluecove-2.1.0.jar
Open a cmd (Command Prompt) on c:\blue
Try to run the app like this:
java -cp .;lib\bluecove-2.1.0.jar -Dbluecove.native.resource=false Server
This way you will have both Server.class and bluecove-2.1.0.jar in classpath and the DLL in path (since on Windows the current dir is in path).
Add a current folder to a classpath (.;) and make sure that your code is in a package-name folder.
So if your server has a package name :
mypackage
make sure that your class code is in a /mypackage directory
than go to a parent folder to /mypackage and call:
java -cp ".;C:\Program Files\Java\bluecove-2.1.0.jar" mypackage.Server
I'm trying to run an application in eclipse which is setup as MVC app and it is the solution code posted by our professor for a homework. After I copy and pasted all of the classes and tried to run it, I got the following error:
JOGL> Hello JOAL Exception in thread "main" java.lang.NoClassDefFoundError: com/jogamp/openal/JoalVersion at jogamp.opengl.openal.av.ALDummyUsage.main(ALDummyUsage.java:14) Caused by: java.lang.ClassNotFoundException: com.jogamp.openal.JoalVersion at java.net.URLClassLoader$1.run(Unknown Source) at java.net.URLClassLoader$1.run(Unknown Source) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(Unknown Source) at java.lang.ClassLoader.loadClass(Unknown Source) at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source) at java.lang.ClassLoader.loadClass(Unknown Source) ... 1 more
I'm not entirely sure what the issue is and apparently no one else has been having the same issue.
My buildpath has a library I titled "JOGL" and I added the external jars gluegen-rt.jar and jogl-all.jar as was instructed by the professor.
Thanks for the help!
Actually, your code uses JOAL too, you need to put joal.jar into your classpath (Build path in Eclipse) and you need to put the JAR(s) containing its native libraries into the same directory as you did for JOGL and GlueGen. I assume you followed these instructions:
http://jogamp.org/wiki/index.php/Setting_up_a_JogAmp_project_in_your_favorite_IDE#Eclipse_IDE_project
Edit.: You don't run your own program for your homework, you try to run ALDummyUsage which is in JOGL itself. If you want to run your own program with your own main class, rather right-click on it and choose "Run As" -> "Java application" in Eclipse.
I have three source files in a folder. I simply want to compile them using commandline and then execute them. However, I'm having the following issue. I am on a windows box:
Code compiles fine:
C:\mycode\src\code>javac Source1.java Source2.java Source3.java
Does not run from the folder where class files are:
C:\mycode\src\deckofcards>java Source1
Exception in thread "main" java.lang.NoClassDefFoundError: Source1 (wrong name: code/Source1)
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClassCond(Unknown Source)
at java.lang.ClassLoader.defineClass(Unknown Source)
at java.security.SecureClassLoader.defineClass(Unknown Source)
at java.net.URLClassLoader.defineClass(Unknown Source)
at java.net.URLClassLoader.access$000(Unknown Source)
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
Could not find the main class: Source1. Program will exit.
However, it does run when moving to parent folder:
C:\mycode\src\code>cd ..
C:\mycode\src>java code/Source1
Hello1
Hello2
Hello3...
......
....
I want to distribute this source to someone and I'm not sure whether they will be on windows or unix box.
Eventually I want to create an executable jar file but that also was giving me an error like this.
Problem here is not with running Java files, it runs fine. So you wanted to understand the following:
In order to run a Java program you need to do the following steps:
Create Java source files (*.java files)
Compile using javac to binary class files (*.class files)
Run the class files using java executable
We use package structure to keep organize the java files. In your case it is a simple application (and you use the package named "code"), but in a large production application we need to organize our code into many packages.
While running the class file, we need to give the class file path (which includes the package path). So in your case you need to execute java code/Source1 to run your class.
You can learn more from this link: http://docs.oracle.com/javase/tutorial/getStarted/cupojava/win32.html
For creating a JAR file you can refer the link: http://docs.oracle.com/javase/tutorial/deployment/jar/build.html
For making a JAR file executable ensure you add manifest file with main-class attribute.
I was trying to export a test of a game I am working on(that uses the Slick library), to send to my partners who lack any IDE, all went well with the export in eclipse, but when I try to run it from command prompt, this is what I get in return.
C:\Users\Noah\Desktop>java -jar test.jar
Exception in thread "main" java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.eclipse.jdt.internal.jarinjarloader.JarRsrcLoader.main(JarRsrcLoa
der.java:58)
Caused by: java.lang.UnsatisfiedLinkError: no lwjgl in java.library.path
at java.lang.ClassLoader.loadLibrary(Unknown Source)
at java.lang.Runtime.loadLibrary0(Unknown Source)
at java.lang.System.loadLibrary(Unknown Source)
at org.lwjgl.Sys$1.run(Sys.java:73)
at java.security.AccessController.doPrivileged(Native Method)
at org.lwjgl.Sys.doLoadLibrary(Sys.java:66)
at org.lwjgl.Sys.loadLibrary(Sys.java:95)
at org.lwjgl.Sys.<clinit>(Sys.java:112)
at org.lwjgl.opengl.Display.<clinit>(Display.java:141)
at org.newdawn.slick.AppGameContainer$1.run(AppGameContainer.java:39)
at java.security.AccessController.doPrivileged(Native Method)
at org.newdawn.slick.AppGameContainer.<clinit>(AppGameContainer.java:36)
at org.nor.Main.main(Main.java:16)
... 5 more
C:\Users\Noah\Desktop>
Any idea what is going wrong?
NOTE: The project runs perfectly fine in eclipse.
You should read up on a "get started" guide on slick if you are going to use it. Slick has several dependencies who use dll's to communicate with opengl. You need to specify where those dll's are kept so these dependencies can load the dll's. I found this link that might help you do that..
You also need the native lwjgl library and point to it. The Export Jar functionality do not handle this.
Read up on the lwjgl manual for how to do this.
You have to add your jars either to:
the classpath in your java invocation
the Manifest.mf of your main jar
Java won't automatically load your jars until they are in one of these locations.
Try with File -> Properties -> Java Build Path -> Order and Export
I am trying to generate wrapper for com4j using tlbimp-20110320.jar. I also tried a 2008 version with the same errors. I get the same errors even when I try running against the example in the tut.
C:\Users\matthew\Documents\NetBeansProjects\test>"C:\Program Files (x86)\Java\jr
e7\bin\java.exe" -jar tlbimp-20110320.jar -o excel -p excel "C:\Program Files (x
86)\Microsoft Office\Office14\EXCEL.EXE"
Exception in thread "main" java.lang.NoClassDefFoundError: org/kohsuke/args4j/Cm
dLineException
at java.lang.Class.getDeclaredMethods0(Native Method)
at java.lang.Class.privateGetDeclaredMethods(Unknown Source)
at java.lang.Class.getMethod0(Unknown Source)
at java.lang.Class.getMethod(Unknown Source)
at sun.launcher.LauncherHelper.getMainMethod(Unknown Source)
at sun.launcher.LauncherHelper.checkAndLoadMain(Unknown Source)
Caused by: java.lang.ClassNotFoundException: org.kohsuke.args4j.CmdLineException
at java.net.URLClassLoader$1.run(Unknown Source)
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
... 6 more
After Iceman provided a link to a required library I was able to get it to run a little. However I had to copy the arg4j contents into the tlbimp jar, and the com4j contents into the tlbimp jar as well. Now I get
C:\Users\matthew\Documents\NetBeansProjects\test>"C:\Program Files (x86)\Java\jr
e7\bin\java.exe" -jar tlbimp-20110320.jar -o excel -p excel "C:\Program Files (x
86)\Microsoft Office\Office14\EXCEL.EXE"
Generating definitions from Excel
A referenced type library "Office" is generated into the same package "excel"
Unable to handle the type SAVEARRAY(Variant)*
method ConnectData
interface IRtdServer
A referenced type library "VBIDE" is generated into the same package "excel"
Exception in thread "main" java.lang.NullPointerException
at com4j.tlbimp.driver.Driver$1.resolve(Driver.java:64)
at com4j.tlbimp.Generator$LibBinder.<init>(Generator.java:382)
at com4j.tlbimp.Generator.getTypeLibInfo(Generator.java:686)
at com4j.tlbimp.Generator.getTypeName(Generator.java:663)
at com4j.tlbimp.TypeBinding.bind(TypeBinding.java:173)
at com4j.tlbimp.MethodBinder.declareReturnType(MethodBinder.java:542)
at com4j.tlbimp.MethodBinder.declareWithDefaults(MethodBinder.java:399)
at com4j.tlbimp.MethodBinder.declare(MethodBinder.java:118)
at com4j.tlbimp.InvocableInterfaceGenerator.generateMethod(InvocableInte
rfaceGenerator.java:39)
at com4j.tlbimp.InterfaceGenerator.generate(InterfaceGenerator.java:94)
at com4j.tlbimp.Generator$LibBinder.generate(Generator.java:491)
at com4j.tlbimp.Generator.generate(Generator.java:112)
at com4j.tlbimp.driver.Driver.run(Driver.java:107)
at com4j.tlbimp.driver.Main.doMain(Main.java:132)
at com4j.tlbimp.driver.Main.main(Main.java:56)
tlbimp-20110320.jar is required args4j-2.0.1.jar and com4j-20110320.jar
Note: com4j-20110320.jar, it is necessary to change the name to com4j.jar
Additional Info
The tlbimp of the latest version (tlbimp-2.1.jar), requires args4j-2.0.8.jar and com4j-2.1.jar.
In this version, file name change is not required.
From the stack trace, it looks like you are missing dependent jars from the java class path. The program seems to be looking for Koshuke's args4j library - http://args4j.kohsuke.org/.
Unjar tlbimp.jar and check out its manifest. It has a classpath where args4j and com4j must be in the same directory as tlbimp.jar and require specific names. The specifics of the name depend on the build and may or may not include version number. Name your com4j and arg4j as indicated and you're good to go.