Good day. I have the following problem. I have a code of application written on Java, which uses external jar library(no sources). This jar library inside loads external native library, which is set up with java.library.path system property. This external native library is DLL. The problem is to run this program in Ubuntu. Ubuntu wants to see not .dll as a library, but .so and there is no .so file available for this program, only .dll. Is there any way to convert .dll to .so or run this program using wine(Ubuntu tool), for example, some how, or any other way?
Will be very thank for help
A .dll file is a Windows format library. You might be able to run it under a Windows emulator in Linux (such as Wine) but there is no way to use it in a native Linux application.
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I am new to java working on voip project linphone-desktop(cross-platform) project. I can generate the build files from the code available on the github. I can install linphone-Desktop application from the dmg file in my system but not sure from where I can find the dylib file to use it in my project to customize the linphone-desktop application as per my requirement.
Firstly, I have tried to use the dll file on my macos but later I have found that dll file on macos can be used through the WINE only but I am using MacOS 10.15(Catelina) on which wine is not supported.
Listing few links which I have already visited.
https://www.chilkatsoft.com/java-loadlibrary-windows.asp
dll can be loaded on MAC os
Loading DLL in java in UNIX system
Any help would be highly appreciated.
I have an Eclipse RCP application that uses some native libraries via JNI. These are shared libraries that dynamically link to each other. On Windows I put these libraries (as *.dll files) next to the RCP launcher executable (*.exe) file and load them via System.load("<absolute file path>"). This works great, as the location of the launcher seems to be added to the java.library.path so that dynamic linking between the libraries works.
On Linux, I get an UnsatisfiedLinkError. The location of the launcher is not added to the java.library.path. When I start the application from the terminal after setting the LD_LIBRARY_PATH variable it works:
export LD_LIBRARY_PATH=.
./myApp
The location . is the added to the java.library.path. Is there a better way to do this? I want the users to just double click the launcher.
Setting -Djava.library.path=. in the myApp.ini file does also not work. I see it in the installation details but I still get an UnsatisfiedLinkError.
The most reliable way to find libraries is not using java.library.path at all but finding them via Java code and load via System.load() instead of System.loadLibrary(). You can apply whatever logic you want for finding the native library (although it's probably best trying not to be too clever) and you could fall back to trying java.library.path if your mechanism fails.
This will only work of course if the library doesn't depend on other libraries that might not be found.
I'm trying to develop a BitTorrent client using the frostwire jlibtorrent librari, but when I run the program alwais obtain the error on the image.
How I can compile using the linux version of the library.
Hi do you run on linux or windows or Mac? The exception indicates that a binary lib can be loaded or found. (the .so file as you indicate).
There is a case the native lib included in the jar - is not compatible or has missing dependencies (links) on your host OS. See here.
The .so library has to be loaded first before it can be used. Use System.load() to do so. Here is an example:
https://www.chilkatsoft.com/java-loadLibrary-Linux.asp
I have a java application using an external dll (zmq). When I run it in debug mode in Eclipse it's all fine. However, when I export the application as Runnable JAR file then trying to run it, I'm getting that error referencing the dll.
Following my research on this site I configured the build path for JRE System Library, added that path of the folder containing the dll to Native library location, but I'm still getting that error.
Is there anything I need to do further? Or different?
Thanks.
JZMQ needs two things to run: zmq.dll (the native ZMQ library) and jzmq.dll (the "bridge" library between Java and ZMQ). The particular error you are getting means your compile environment can't locate jzmq.dll; you just need to specify the path where it can find jzmq.dll. Note that, as far as I'm aware, there is no way for jzmq.dll to be in a JAR file so you can just include it in your classpath.
Unfortunately, I can't tell you exactly how to do it in Windows. I come from Linux, where DLLs are SO files. There it would be a simple export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/path/to/jzmq.
I just completed working on a client's tool, which uses Jfreechart jar, and dll and a lib file for JNI interface. Now I would like to export/ provide a executable file to client, I tried to click on java project folder and export Java>Runnable Jar file (extract required libraries into generated JAR) , a Jar file is exported with some Warnings. However, we are not able to run the file on client's machine. How can I fix this, obviously I don't want to provide complete Java project and ask client to run from and IDE. Please provide me inputs.
Since Java is a cross-platform environment, it doesn't really have "executable files" like EXEs or anything. Instead, you run your .jar file with the Java runtime. For example:
C:\>java.exe MyProgram.jar
Of course some operating systems will just do this for you once the Java runtime is installed.
There are some programs to convert .JAR to .EXE, but I believe they just compile a thin wrapper that calls into the Java runtime.