I am having trouble exporting my java project from eclipse as a jar executable file. My java project uses an external library (its called jri). I have exported the jri.jar file and set the library path for its native library in eclipse, and it works great in development in eclipse. However, when I export it as an executable jar file I get the following error:
Cannot find JRI native library!
Please make sure that the JRI native library is in a directory listed in java.library.path.
I have placed a folder called lib in the same directory as my project's jar; this lib folder contains jri's native library. jri's native library is not in one file but in a folder. This is the same setup I have in eclipse.
The way I am exporting my project in eclipse is
Export...
Java > Runnable JAR file
Copy required libraries into a sub folder next to the generated Jar
Finish
And my folder is organized like this
folder project
project.jar
project_lib
jri.jar
jri native library folder
The MANIFEST.MF of my project.jar is:
Manifest-Version: 1.0
Class-Path: . project_lib/jri.jar
Main-Class: index
What I want to achieve is to give another person a folder including project.jar and anything else needed so she/he can run it without needing to install anything else.
Thanks so much
Add a script containing something like that:
#!/bin/bash
java -Djava.library.path=project_lib/native/ -jar project_lib/jri.jar
I export some java projects that way.
This is relatively hard to implement. The solutions I have seen involve extracting the native libraries in the JAR to an OS temp directory and then loading it. I would go for an integrated solution for that. One Jar and Java Class Loader support it, and on the second page you will find links to similar tools.
You can put the libraries inside your jar:
Export...
Java > Runnable JAR file
Package required libraries into generated Jar
Finish
I always export this way.
I don't know if it will work in your case, but worth a try.
Edit:
See these links:
Instalation, setup and setting environment properly
What to do when getting Cannot find JRI native library!
My guess is that this have something to do with LD_LIBRARY_PATH not correctly been set. Or the file wich it is searching for isn't in the path listed.
You know I had the similar problems
Could not extract native JNI library.
all above proposes can't help me. I couldn't stop and start gradle deamon by using follow command:
gradle --stop
I saw that gradle deamon still not stopped in my processes. That's why I kill it in my process and all will be fine :)
Related
I have created an application using the JFreeChart library for use on another machine.
Previously I have developed applications with JFreeChart (using the same libraries) which has worked fine on other machines. The only difference is this machine is running Vista.
Please see below for the run-time exception I am getting:
The class that cannot be found, however, is located in the highlighted jar in the below image showing my imported libraries for the JAR. I have also established that this JAR is included in the manifest for the application. See below image:
So I very much need this to work and have no idea where to look next - or what is causing this problem!
Development machine Java version:
1.7.0_45
Target machine Java version:
1.7.0_45
Thanks in advance.
Check the Class-Path attribute in your JAR's manifest, which should contain entries like this:
Class-Path: lib/jfreechart-1.0.17.jar lib/jcommon-1.0.21.jar …
Also, examine dist/README.TXT in your NetBeans project folder, which should say something like this regarding libraries required by your project:
To run the project from the command line, go to the dist folder and
type the following:
java -jar "CISOnlineMonitor.jar"
To distribute this project, zip up the dist folder (including the lib folder)
and distribute the ZIP file.
This has nothing to do with os i belive.You dont have all the necessery libs within your jar.Try to open a jar and see if you have them in.Fact that you are able to run it on your maschine only proves that.Make executable jar with eclipse or whathever you use.And when it ask you for libs check -Extract required libraries into generated Jar.
if you dont know how to get to that point
File>Export>Java>Runnable Jar File> Runnable JAR File Specification.
Also right click on your project and check Your build path.
RightClick project>Properties>Java Build Path>Libraries
Make sure you have everything correct
EDIT-
As i see you use NetBeans im not sure exactly how to find all this there.Bud it will be very similiar.
In my project I have an rxtx library that I use to manage Serial comms. When I run the application in netbeans ide I have no problems. I have put the rxtx files in my java folders and added the path in the project libraries.
The problems start when I build the jar file for the project. It creates the jar file and adds the folder for costum libraries at /lib folder. However I am not able to run the jar file by double clicking on it. When I run it from command line I get:
java.lang.UnsatisfiedLinkError: no rxtxSerial in java.library.path thrown while loading gnu.io.RXTXCommDriver
What should I do in order for the program be able to find the rxtx library in the /lib folder?
You must either:
Provide the classpath containing your /lib when you run java from the command line. Use the -cp option to do this.
Properly create an executable jar that bundles your /lib. I use maven and this plugin to create that: https://code.google.com/p/onejar-maven-plugin/
When you execute the program from the command line, you will need to specify the java.library.path to make sure that your native libraries are accessible by the JVM.
Without knowing how you actually run your program, I am going to take a guess at what the command should look something like:
java -cp yourjar.jar -Djava.library.path=/yourProjectPath/lib gnu.io.RXTXCommDriver
You can extract the required libraries into the jar file (when you don't want to use command line). Checkout this site to make this happen at netbeans.
I did check the already answeared questions which have almost the same topic as this question but none of the answeared onces were able to solve my problem.
I have been searching now online for about 4 hours and tried soo many different things to solve my problem..
Im trying to make a Pong game in Java and now i wanted to export my project so i can send it to some friend so he can try it.
Im using LWJGL for this project so i do have some jars added to the referenced libraries, And the LWJGL.jar has the windows natives added which is included in the projects lib folder.
Here is an image of the project viewer:
Reason im posting this image is so you get an idea of that i have all the libraries inside the project aswell as the natives needed for the project to run.
While reading about why the jar didnt work i also read that you need a Manifest.mf file so i created one and inside this manifest file i have the following text:
Manifest-Version: 1.0
Main-Class: jGame.Main
Class-Path: lib/jars/asm-debug-all.jar lib/jars/jinput.jar lib/jars/lwjgl.jar lib/jars/izma.jar lib/jars/slick.jar
Also 2 empty lines underneath Class-Path since i heard u have to have that.
This project runs fine aslong as i run it in eclipse but when i export the project with either runnable jar or jar wizard in eclipse it doesn't start when i double click the .jar file so i went into the cmd and used this command:
java.exe -jar JGame.jar
And the following message was shown:
I have checked atleast 10 times that i provided the correct path for the main class.. And i dont know what to do anymore. In the eclipse wizard i have been trying both to export runnable jar and exporting normal jar but none of the two is working. Also in the wizards i have selected to export a normal jar not runnable since when i choose runnable the libraries get messed up because the lib folder gets replaced.
I tried opening the jar file as an archive and got the following:
In an attempt of using JarSplice i suceeded to solve the problem.
After reading this:
It's not going to work the way you're trying to currently do it, since you need to have the native files along side the jar and point
to them via the '-Djava.library.path' parameter.
If you just want a single jar and want to avoid the hassle of the
command line and native files use the JarSplice tool. JarSplice is
easy to use and will automatically handle the native file stuff for
you.
1) Simply export your project (class and resources) to a jar (easier
just to do it through your IDE).
2) Then run JarSplice, add all the jars you need to the jars tab (your
app jar, lwjgl.jar, and any other external jar you're using).
3)Then on the natives tab add all the natives files (windows *.dll,
linux *.so, mac *.dylib & *.jnilib).
4)On the class tab add your main class. Then create your jar.
You can then run this jar just by double clicking it (or if you wish
via command line using 'java -jar yourapp.jar').
I found this solution from this link: Can't start .jar file (using LWJGL)
Reason why it didnt work the first time were i didn't include the actual .jar file that was exported from eclipse while using JarSplice.
Right now i've written a simple SWT application using eclipse, and I want to pack it into an executable .jar file so I can give it out to friends and such. But I have the following problems:
-Right now i'm reading files by using their filename in the program, and putting them in the root folder of the eclipse project. That works fine for running in eclipse, but when I export to jar they're not in the jar. Is there a way to put them in the jar and access them in the code?
-I also need the SWT .jar dependencies or whatever its called(the files you need for SWT).
Does anyone know how to do this?
Take a look at ClassLoader.getResourceAsStream() API.
All you need to do is include these files in the with the source code of your project, then to have access to then have a look at this link
I have created a java application in eclipse, wich needs comm.jar and jexcel.jar and .property files so i have added to libray. I want to make a jar file out of my java appliction, including the external jar files added to the appliction.
How can I do it? To run serialport programs I have copied win32.dll into java_home/bin and comm.jar into java_home/jre/lib and javax.comm.properties into java_home/jre/lib, but when delivering the product it should run only by needing the jre.
How can I solve this? Please help me.
Thanks in advance,
suma
Although your question is not totally clear I suggest using the Fat Jar Plugin should allow you to achieve what you want.
You can use File > Export > Executable Jar which includes all libraries. There is also a checkbox to generate an ant build file as well as the jar in order to customize it further (I for instance make all the paths relative and remove the main-class flag).
You have two "path" issues. The Java Classpath and the path from which dlls are loaded.
If you were using a Java EE app server or OSGi then controlling these paths is addressed by the respective runtimes. Both Java EE and OSGi are likely to be overkill for small projects.
In which case you are delivering:
Your application JAR
The dependent jars
The DLLs
I suggest that on installing your app you place these artefacts into a suitable directory structure, for example .../myapp/lib for the jars and .../myapp/bin for the dlls. Don't copy them into the infrastructure directories, for example the JRE lib and bin, or into Windows32 - that just leads to version nightmares and mysteries when someone installs a new jre.
Having got that structure, how to control the paths? For the classpath, look at the Manifest.mf file. tutorial
For the DLL path, I know of no good alternative to setting OS level environment variables ** before ** launching the JVM. Hence you need a little batch/shell script to launch your app, setting the PATH appropriately.
You can also check maven.
You can right click on the project and say "Export". Now select "Java" in tree of choices. Under that select "Jar File". It'll guide you through the process and will allow you to export you project as a jar file.
Hope thats what you are looking for.
The recently released Eclipse 3.5 has a Export as runnable Jar which allows to put all dependent jars in a subfolder to the jar file, and get the Manifest right.
It is an adaption of the FatJar plugin. Works nicely!