Develop Reference

JCEF initialization issue on MacOS

My Java app which uses JCEF, works perfectly fine in Windows Operating System. But when I try to run this sample application on MacOS Mojave, then it's facing initialization issues. I have added the desired jars and JCEF MacOS libraries/binaries into my project, also added JVM parameter to startup configuration as:
-Djava.library.path=*/jcef/jcef_build/native/Release,
but at the time of running application im facing the folowing error:
Exception in thread "main" java.lang.UnsatisfiedLinkError: /jcef_build/native/Release/libjcef.dylib: dlopen(*/jcef_build/native/Release/libjcef.dylib, 1): Library not loaded: #rpath/Frameworks/Chromium Embedded Framework.framework/Chromium Embedded Framework
Referenced from: */jcef_build/native/Release/libjcef.dylib
Reason: image not found
at java.lang.ClassLoader$NativeLibrary.load(Native Method)
at java.lang.ClassLoader.loadLibrary0(ClassLoader.java:1941)
at java.lang.ClassLoader.loadLibrary(ClassLoader.java:1857)
at java.lang.Runtime.loadLibrary0(Runtime.java:870)
at java.lang.System.loadLibrary(System.java:1122)
at org.cef.CefApp.<init>(CefApp.java:149)
at org.cef.CefApp.getInstance(CefApp.java:237)
at org.cef.CefApp.getInstance(CefApp.java:224)
at MainFrame.<init>(MainFrame.java:70)
at MainFrame.main(MainFrame.java:145)
Please any one suggest what I am missing in running this sample application.

How to connect JPL with SWI-Prolog in Mac OS X

Hi i have a problem with a jpl interface. I want connect JPL with swi-prolog installed with mac-ports with eclipse. I have a jpl.jar and i have tried to import the jar file in eclipse with build path but i have this error: "no jpl in java.library.path".
So i have copied libjpl.dylib in a /opt/local/lib/swipl-7.1.29/bin/ and when i execute the code i have this error: "Exception in thread "main" java.lang.UnsatisfiedLinkError: /opt/local/lib/swipl-7.1.29/bin/libjpl.dylib: dlopen(/opt/local/lib/swipl-7.1.29/bin/libjpl.dylib, 1): Library not loaded: /Users/janw/stable/lib/swipl/lib/x86_64-darwin13.0.0/libswipl.dylib
Referenced from: /opt/local/lib/swipl-7.1.29/bin/libjpl.dylib
Reason: image not found"

After a anoying waste of time i found the solution about that problem.
First of all, its completely necesary to install swi-prolog via macports, if not, as i did, when you point in the
Djava.library.path=/users/rivax/Applications/SWI-Prolog.app/Contents/swipl/lib/x86_64-darwin13.0.0
this exception will apear
Exception in thread "main" java.lang.UnsatisfiedLinkError: /Users/rivax/Applications/SWI-Prolog.app/Contents/swipl/lib/x86_64-darwin13.0.0/libjpl.dylib: dlopen(/Users/rivax/Applications/SWI-Prolog.app/Contents/swipl/lib/x86_64-darwin13.0.0/libjpl.dylib, 1): Library not loaded: /Users/janw/stable/lib/swipl/lib/x86_64-darwin13.0.0/libswipl.dylib
Referenced from: /Users/rivax/Applications/SWI-Prolog.app/Contents/swipl/lib/x86_64-darwin13.0.0/libjpl.dylib
Reason: image not found
at java.lang.ClassLoader$NativeLibrary.load(Native Method)
at java.lang.ClassLoader.loadLibrary1(ClassLoader.java:1965)
at java.lang.ClassLoader.loadLibrary0(ClassLoader.java:1890)
at java.lang.ClassLoader.loadLibrary(ClassLoader.java:1880)
at java.lang.Runtime.loadLibrary0(Runtime.java:849)
at java.lang.System.loadLibrary(System.java:1088)
at jpl.JPL.loadNativeLibrary(JPL.java:100)
at jpl.fli.Prolog.<clinit>(Prolog.java:85)
at jpl.Query.open(Query.java:286)
at jpl.Util.textToTerm(Util.java:162)
at jpl.Query.<init>(Query.java:198)
at consultasProlog.Consultas.consultaFicheroProlog(Consultas.java:19)
at utilidades.RellenarModelo.ejecutarArchivo(RellenarModelo.java:30)
at javaprolog.JavaProlog.main(JavaProlog.java:30)
Java Result: 1
So follow these steps.
port install swi-prolog on terminal , if you dont have install already macports command not found will apear so go to https://www.macports.org/install.php and install macports.
navigate to the path of swi prolog macports installation which mine is
/opt/local/lib/swipl-6.6.6/lib/x86_64-darwin14.0.0
copy this path and set in java.library.path in the java VM as -Djava.library.path=/opt/local/lib/swipl-6.6.6/lib/x86_64-darwin14.0.0
Now .pl with jpl.jar will be able to execute and the consults will run.
Hope it will help you and every person who find this hell problem.
Cheers frank.

Cannot run Xuggler on linux

I have a problem running Xuggler on linux:
08:43:05.550 [main] WARN com.xuggle.ferry.JNILibrary - Failure: library load of library: xuggle; url: /tmp/xuggle/xuggle2624685369771797713.tmp; error: java.lang.UnsatisfiedLinkError: /tmp/xuggle/xuggle2624685369771797713.tmp: /tmp/xuggle/xuggle2624685369771797713.tmp: failed to map segment from shared object: Operation not permitted
08:43:05.565 [main] ERROR com.xuggle.ferry.JNILibraryLoader - Could not load library: xuggle; version: 5; Visit http://www.xuggle.com/xuggler/faq/ to find common solutions to this problem
Exception in thread "main" java.lang.UnsatisfiedLinkError: no xuggle in java.library.path
Same JAR works fine on Windows.
I tried to include xuggler-5.4.jar, 5.2.jar, I also tried to make maven project and to compile with maven, the problem persists.
Here is the CLASSPATH, so you can see I also included lately in the classpath the jar
/usr/lib/jvm/java-1.7.0-openjdk-1.7.0.25.x86_64//jre/lib/ext:/usr/lib/jvm/java-1.7.0-openjdk-1.7.0.25.x86_64//lib/tools.jar:/home/baidoc/libs/xuggle-xuggler-5.4.jar

Eclipse Error: no jogl in java.library.path

So I'm quite new to eclipse (first week of actually trying to use it to develop stuff.) and I tried to import an example project from http://unfoldingmaps.org/ and upon trying to compile their test project I'm greeted with the error:
Eclipse Error: Exception in thread "Animation Thread" java.lang.UnsatisfiedLinkError: no jogl in java.library.path
Right now my $path sys var looks like this:
C:\csvn\Python25\;%SystemRoot%\system32;%SystemRoot%;%SystemRoot%\System32\Wbem;%SYSTEMROOT%\System32\WindowsPowerShell\v1.0\;C:\Program Files\SourceGear\Common\DiffMerge\;C:\Program Files\TortoiseSVN\bin;C:\Program Files\MySQL\MySQL Server 6.0\bin; %JAVA_HOME%;%ANT_HOME%\bin
Is there something that I'm missing? Jogl.jar is in the project but it seems like the project is just skipping over stuff.. help?

It seems that your application requires some sort of native library, you need to specify the parameter -Djava.library.path=/path/to/libs on the VM args field on eclipse.

acm.jar ECLIPSE on Linux Problem

I created a new project and a new class in eclipse in my ubuntu machine to write the simple Hello World program. It works fine as long as i write the main method and use System.out.println to print my "Hello World". but i want to use the acm.jar package so I imported it to my project and tried to extend the ConsoleProgram class in acm.jar but once i write the public void run() method and try to run it i get some error
i know that i have imported acm.jar successfully because eclipse suggested the rest of the import when i was typing import acm.program.*;
here is the results i get:
Exception in thread "main" java.lang.NoClassDefFoundError: sun.applet.AppletViewer
at gnu.java.lang.MainThread.run(libgcj.so.90)
Caused by: java.lang.ClassNotFoundException: sun.applet.AppletViewer not found in gnu.gcj.runtime.SystemClassLoader{urls=[file:/home/bilm3z/workspace/xbSampleProject1/bin/,file:/home/bilm3z/workspace/acm.jar], parent=gnu.gcj.runtime.ExtensionClassLoader{urls=[], parent=null}}
at java.net.URLClassLoader.findClass(libgcj.so.90)
at gnu.gcj.runtime.SystemClassLoader.findClass(libgcj.so.90)
at java.lang.ClassLoader.loadClass(libgcj.so.90)
at java.lang.ClassLoader.loadClass(libgcj.so.90)
at gnu.java.lang.MainThread.run(libgcj.so.90)
here is a snapshot of the situation:
http://www.mypicx.com/12302009/situation1/

It follows from your stack trace that you're using a GCJ JVM. Try installing the Sun JVM - there are instructions here. (Note that you might have to enable different repositories for this, and note the update-java-alternatives command.)
After you install the Sun JVM, update your Eclipse preferences according to Bozho's answer, so that your Eclipse uses the correct JVM.

That's strange. Try Right click on your project > Build path > Configure built path > libraries, remove the JRE / JDK from there (if it exists), and add it anew - Add library > JRE System Library