Develop Reference

Processing on Java error on Mac OS

I got this error message in the console when I tried to run, I just switched laptops and I've wiped my old one. This project has always been stored in a USB so I use that to run it on my new laptop. (So I had to re-download all the applications), I need this to fix so bad due to its my project for class and I haven't record it and I'm supposed to do that and I don't want to fail the class please could u help thank u:
java.lang.NoClassDefFoundError: com/apple/eawt/QuitHandler
at java.base/java.lang.Class.getDeclaredMethods0(Native Method)
at java.base/java.lang.Class.privateGetDeclaredMethods(Class.java:3119)
at java.base/java.lang.Class.getMethodsRecursive(Class.java:3260)
at java.base/java.lang.Class.getMethod0(Class.java:3246)
at java.base/java.lang.Class.getMethod(Class.java:2065)
at processing.core.PApplet.runSketch(PApplet.java:10751)
at processing.core.PApplet.main(PApplet.java:10548)
at processing.core.PApplet.main(PApplet.java:10530)
at robothead.Robothead.main(Robothead.java:8)
Caused by: java.lang.ClassNotFoundException: com.apple.eawt.QuitHandler
at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:582)
at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:190)
at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:499)
... 9 more
I at first download JDK 10 and I read it only works with JDK 8 so I download that and delete JDK 10 in hopes that stuff will return back to normal and it does not works. Also the project, I did it in java oxygen and I downloaded photon on my new laptop and click on the yes I want to convert the files thing so I decided to make a new workspace and copy paste the code but still got that error?Before it was MacBook Air and I switch to the MacBook Pro.

You are mixing up a lot of things.
The basic problem is that starting with Java 9 oracle made changes that lead to such errors ( see https://docs.oracle.com/javase/9/migrate/toc.htm#JSMIG-GUID-C86F7403-7D7C-456F-8873-18C7F1BEDE2F).
So, in order to get this to work, you have to ensure that Java 8 is used. And that your Java 10 installation was really, fully removed. You should then check your eclipse settings to also ensure that it is pointing to Java 8.

VirtualMachine.attach failing

I wrote a program that uses the VirtualMachine attach API to dynamically attach to a jar. My machine is 64 bit, and the only reason I can think of that would stop is because of my messing around with the environment variables of java(no java_home was set and I tried to fix it). Since getting this error, I have reinstalled both the JDK and JRE to no avail. My guess is that it is some sort of problem loading attach.dll, which is 64 bit.
Anyone have suggestions?
Stack trace of error:
at sun.tools.attach.HotSpotAttachProvider.listVirtualMachines(HotSpotAttachProvider.java:92)
at sun.tools.attach.WindowsAttachProvider.listVirtualMachines(WindowsAttachProvider.java:76)
at com.sun.tools.attach.VirtualMachine.list(VirtualMachine.java:147)
at me.stoud.*.JVM.<init>(JVM.java:19)
at me.stoud.helper.*.checkJVM(CheckHelper.java:158)
at me.stoud.helper.*.initiateChecks(CheckHelper.java:39)
at me.stoud.start.Launch.main(Launch.java:33)
Caused by: java.lang.NullPointerException
at sun.jvmstat.perfdata.monitor.protocol.local.LocalVmManager.activeVms(LocalVmManager.java:148)
at sun.jvmstat.perfdata.monitor.protocol.local.MonitoredHostProvider.activeVms(MonitoredHostProvider.java:150)
at sun.tools.attach.HotSpotAttachProvider.listVirtualMachines(HotSpotAttachProvider.java:81)
... 6 more
Forgot to include: it's a java.lang.InternalError being thrown

Matlab has critical error from clean install (possibly OS X related?)

Using R2014b on OS X Yosemite.
Exception in thread "Startup Class Loader" java.lang.UnsatisfiedLinkError: jogamp.common.jvm.JVMUtil.initialize(Ljava/nio/ByteBuffer;)Z
at jogamp.common.jvm.JVMUtil.initialize(Native Method)
at jogamp.common.jvm.JVMUtil.<clinit>(JVMUtil.java:58)
at com.jogamp.common.os.Platform$1.run(Platform.java:212)
at java.security.AccessController.doPrivileged(Native Method)
at com.jogamp.common.os.Platform.<clinit>(Platform.java:179)
at javax.media.opengl.GLProfile.<clinit>(GLProfile.java:83)
at com.mathworks.hg.peer.JavaSceneServerPeer.initializeJOGL(JavaSceneServerPeer.java:114)
at com.mathworks.hg.peer.JavaSceneServerPeer.<clinit>(JavaSceneServerPeer.java:100)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:190)
at com.mathworks.mde.desk.StartupClassLoader.loadClass(StartupClassLoader.java:258)
at com.mathworks.mde.desk.StartupClassLoader.access$900(StartupClassLoader.java:25)
at com.mathworks.mde.desk.StartupClassLoader$2.run(StartupClassLoader.java:244)
at java.lang.Thread.run(Thread.java:745)
This pops up the moment I start matlab. I am unable to use imagesc() or imshow() and probably loads of other functions, because matlab crashes with Caught unexpected exception of unknown type. instantly.
I'm at my wits end. The matlab install is fresh, and so is the OS. Same problem using the Java from Apple or the Java from Oracle.
EDIT: Response from MathWorks is that integration with Maple breaks everything. Emptying the .maplerc.sh file in the /bin/ directory fixes everything.

This issue is caused by having installed Matlab integration through maple. A file called .maplerc.sh is placed within the /bin/ folder in the matlab .app, and it apparently breaks everything. You cannot delete the file (this causes matlab to not launch on start up) but you can erase its contents. This will create an error upon launch, but you can ignore it and everything will work fine.
Uninstall matlab and maple, and reinstall maple and matlab without integration will fix the issue entirely.

Replace the contents of the file /Applications/MATLAB_R2014b.app/bin/.maplerc.sh by an empty line (as suggested by the other answer from Dorako), and
Modify the file /Applications/MATLAB_R2014b.app/toolbox/local/matlabrc.m, by searching for Maple in this text file and comment-out or remove the part between the two lines containing %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%.
The second step ensures that there is no error or warning message any more on startup, so that re-installing the programs is not necessary.

How to get the buildindex step working in the semanticvectors java package on a mac OS X terminal?

I'm trying to use semantic vectors. Here are some links:
https://code.google.com/p/semanticvectors/wiki/InstallationInstructions
https://code.google.com/p/semanticvectors/
Anyway, I'm on the step where you input java pitt.search.semanticvectors.BuildIndex, but I'm lacking results.
The current part I'm following is "To Build and Search a Model".
I am able to compile the package successfully with the ant command and I did get the first step working with first setting the class path with:
export CLASSPATH=./lib/lucene-core-3.6.2.jar:./…
And then inputing
java org.apache.lucene.demo.IndexFiles -docs .
However with this next step I'm getting these errors:
user:/home/data/SemanticVectors/semant… java pitt.search.semanticvectors.BuildIndex
Exception in thread "main" java.lang.NoClassDefFoundError: pitt/search/semanticvectors/BuildIndex
Caused by: java.lang.ClassNotFoundException: pitt.search.semanticvectors.BuildIndex
at java.net.URLClassLoader$1.run(URLClassLo…
at java.security.AccessController.doPrivile… Method)
at java.net.URLClassLoader.findClass(URLCla…
at java.lang.ClassLoader.loadClass(ClassLoa…
at sun.misc.Launcher$AppClassLoader.loadCla…
at java.lang.ClassLoader.loadClass(ClassLoa…
Could not find the main class: pitt.search.semanticvectors.BuildIndex. Program will exit.
I am using a terminal on a mac OS X

As I see your post, it appears you are not providing a path to the semanticvectors-x.x.jar file as indicated in
export CLASSPATH=./lib/lucene-core-3.6.2.jar:./…
Once this change is done, it should work.

OpenCV Classpath in Netbeans

i just started working with JavaCV under MacOSX. I compiled OpenCV with CMake from the latest source and put the path where the libraries are into the -Djava.library.path=\path\to\libraries JVM Argument and added the JavaCV Libraries in my Project Settings. I also tried several other Variation of the Classpath. But when i launch an easy Project to just grab one image from my webcam i get following error:
Exception in thread "Thread-3" java.lang.UnsatisfiedLinkError: no jnivideoInputLib in java.library.path
at java.lang.ClassLoader.loadLibrary(ClassLoader.java:1758)
at java.lang.Runtime.loadLibrary0(Runtime.java:823)
at java.lang.System.loadLibrary(System.java:1045)
at com.googlecode.javacpp.Loader.load(Loader.java:358)
at com.googlecode.javacpp.Loader.load(Loader.java:285)
at com.googlecode.javacv.cpp.videoInputLib.<clinit>(videoInputLib.java:80)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:169)
at com.googlecode.javacpp.Loader.load(Loader.java:305)
at com.googlecode.javacpp.Loader.load(Loader.java:285)
at com.googlecode.javacv.cpp.videoInputLib$videoInput.<clinit>(videoInputLib.java:192)
at com.googlecode.javacv.VideoInputFrameGrabber.start(VideoInputFrameGrabber.java:89)
at webcampong.Grabber.run(Grabber.java:35)
at java.lang.Thread.run(Thread.java:680)

It is due to the compatibility issue of your openCV and javaCV libraries.
Try to download compatible openCV libraries (containing bin folder).

VideoInputFrameGrabber works only under Windows.
As stated in JavaCV's README.txt:
New videoInputLib wrapper and corresponding VideoInputFrameGrabber to capture using DirectShow, useful under Windows 7 where OpenCV and FFmpeg can fail to capture using Video for Windows (issue #58)

I use javacpp and videoinput to manipulate cameras. I got the error 'java.lang.UnsatisfiedLinkError: no jnivideoInputLib in java.library.path' when I call 'videoInput.listDevices()'.
I fix the problem by adding codes like:
org.bytedeco.javacpp.Loader.load(org.bytedeco.javacpp.opencv_highgui.class);
System.out.println(videoInput.listDevices());
you must call 'Loader.load' first before you call other methods, I don't know why.