Hi I want to write a client/server application with java rmi, that the client has the ability to run the window media player in the server side. I have used the ProcessBuilder class like this:
ProcessBuilder process= new ProcessBuilder(“mwplayer”).start();
but it doesn’t work. It cause these exceptions:
java.io.IOException: Cannot run program "mwplayer": CreateProcess error=2, The system cannot find the file specified
at java.lang.ProcessBuilder.start(Unknown Source)
at server.ServerFrame.mediaPlayer(ServerFrame.java:135)
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 sun.rmi.server.UnicastServerRef.dispatch(Unknown Source)
at sun.rmi.transport.Transport$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at sun.rmi.transport.Transport.serviceCall(Unknown Source)
at sun.rmi.transport.tcp.TCPTransport.handleMessages(Unknown Source)
at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run0(Unknown Source)
at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
Caused by: java.io.IOException: CreateProcess error=2, The system cannot find the file specified
at java.lang.ProcessImpl.create(Native Method)
at java.lang.ProcessImpl.<init>(Unknown Source)
at java.lang.ProcessImpl.start(Unknown Source)
... 16 more
How can I solve this problem? Can you help me with it?
Thanks a lot
The error message is telling you that the ProcessBuilder can't see a file named mwplayer.
Maybe try specifying the full path to mwplayer, instead of just the binary name. I would imagine there aren't any environment variables set in the context of your call.
Isn't it called 'wmplayer', with the m and the w swapped?
Related
I installed Gephi 0.10.1 for Windows from https://gephi.org/users/download/, but the initialization of the Overview tab takes forever and I cannot view any graphs (including the test ones like Les Miserables.gexf). The little 'no entry' sign in the lower right corner says 'Unexpected Exception' and 'java.lang.reflect.InvocationTargetException'.
The messages.log file located in your file:///C:/Users/ACER/AppData/Roaming/gephi/0.10/var/log/ is as follows:
' java.lang.UnsatisfiedLinkError: Cant load library: C:\Program Files\Gephi-0.10.1\natives\windows-amd64\\gluegen_rt.dll
at java.base/java.lang.ClassLoader.loadLibrary(Unknown Source)
at java.base/java.lang.Runtime.load0(Unknown Source)
at java.base/java.lang.System.load(Unknown Source)
at com.jogamp.common.jvm.JNILibLoaderBase.loadLibraryInternal(JNILibLoaderBase.java:625)
at com.jogamp.common.jvm.JNILibLoaderBase.access$000(JNILibLoaderBase.java:64)
at com.jogamp.common.jvm.JNILibLoaderBase$DefaultAction.loadLibrary(JNILibLoaderBase.java:107)
at com.jogamp.common.jvm.JNILibLoaderBase.loadLibrary(JNILibLoaderBase.java:488)
at com.jogamp.common.os.DynamicLibraryBundle$GlueJNILibLoader.loadLibrary(DynamicLibraryBundle.java:427)
at com.jogamp.common.os.Platform$1.run(Platform.java:321)
at java.base/java.security.AccessController.doPrivileged(Native Method)
at com.jogamp.common.os.Platform.<clinit>(Platform.java:290)
at com.jogamp.opengl.GLProfile.<clinit>(GLProfile.java:154)
at org.gephi.visualization.swing.GLAbstractListener.getCaps(GLAbstractListener.java:179)
at org.gephi.visualization.swing.NewtGraphCanvas.initDrawable(NewtGraphCanvas.java:68)
at org.gephi.visualization.swing.GLAbstractListener.getGraphComponent(GLAbstractListener.java:548)
at org.gephi.visualization.component.GraphTopComponent$1.lambda$run$1(GraphTopComponent.java:131)
at java.desktop/java.awt.event.InvocationEvent.dispatch(Unknown Source)
at java.desktop/java.awt.EventQueue.dispatchEventImpl(Unknown Source)
at java.desktop/java.awt.EventQueue$4.run(Unknown Source)
at java.desktop/java.awt.EventQueue$4.run(Unknown Source)
at java.base/java.security.AccessController.doPrivileged(Native Method)
at java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(Unknown Source)
at java.desktop/java.awt.EventQueue.dispatchEvent(Unknown Source)
at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:136)
at java.desktop/java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
at java.desktop/java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
at java.desktop/java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
at java.desktop/java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.desktop/java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.desktop/java.awt.EventDispatchThread.run(Unknown Source)
Caused: java.lang.reflect.InvocationTargetException
at java.desktop/java.awt.EventQueue.invokeAndWait(Unknown Source)
at java.desktop/java.awt.EventQueue.invokeAndWait(Unknown Source)
at java.desktop/javax.swing.SwingUtilities.invokeAndWait(Unknown Source)
at org.gephi.visualization.component.GraphTopComponent$1.lambda$run$2(GraphTopComponent.java:128)
Caused: java.lang.RuntimeException
at org.gephi.visualization.component.GraphTopComponent$1.lambda$run$2(GraphTopComponent.java:136)
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
[catch] at java.base/java.lang.Thread.run(Unknown Source)`
The solutions proposed e.g. here (https://github.com/gephi/gephi/issues/2189) did not work for me, nor did reinstalling Gephi. How can I solve this issue?
Building gephi following the tutorial from https://github.com/gephi/gephi/wiki/How-to-build-Gephi (rather than downloading it directly) solved the problem.
My previous question was deleted here because it was considered as duplicate. I say it's not because the answers were about java itself while mine is about charles proxy and those answers didn't resolve my problem.
I had installed jdk-17.0.1 and jre1.8.0_311 on my machine when I tried to open charles proxy 4.6.2 on double click but nothing happened, the application didn't start. I try to open via command prompt by typing Charles.exe and this error is shown
java.awt.AWTError: Assistive Technology not found: com.sun.java.accessibility.AccessBridge
at java.desktop/java.awt.Toolkit.newAWTError(Unknown Source)
at java.desktop/java.awt.Toolkit.fallbackToLoadClassForAT(Unknown Source)
at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(Unknown Source)
at java.base/java.util.stream.ReferencePipeline$2$1.accept(Unknown Source)
at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(Unknown Source)
at java.base/java.util.stream.AbstractPipeline.copyInto(Unknown Source)
at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(Unknown Source)
at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(Unknown Source)
at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(Unknown Source)
at java.base/java.util.stream.AbstractPipeline.evaluate(Unknown Source)
at java.base/java.util.stream.ReferencePipeline.forEach(Unknown Source)
at java.desktop/java.awt.Toolkit.loadAssistiveTechnologies(Unknown Source)
at java.desktop/java.awt.Toolkit.getDefaultToolkit(Unknown Source)
at de.sciss.syntaxpane.DefaultSyntaxKit.<clinit>(DefaultSyntaxKit.java:105)
at com.xk72.charles.gui.lib.UIUtils.<clinit>(Unknown Source)
at com.xk72.charles.gui.s.h(Unknown Source)
at com.xk72.charles.gui.Main.c(Unknown Source)
at com.xk72.charles.Main.b(Unknown Source)
at com.xk72.charles.gui.Main.main(Unknown Source)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.base/java.lang.reflect.Method.invoke(Unknown Source)
at com.xk72.lib.a.a(Unknown Source)
at com.xk72.charles.gui.MainWithClassLoader.main(Unknown Source)
Caused by: java.lang.ClassNotFoundException: com.sun.java.accessibility.AccessBridge
at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(Unknown Source)
at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(Unknown Source)
at java.base/java.lang.ClassLoader.loadClass(Unknown Source)
at java.base/java.lang.Class.forName0(Native Method)
at java.base/java.lang.Class.forName(Unknown Source)
... 24 more
I'm using Windows 10 64bit. %JAVA_HOME% is also setup
For me going to C:\Users\my account\.accessibility.properties and commenting out every line by adding a # a front of it worked.(I at least don't need the accessibility)
Found this solution at: Exception in thread "main" java.awt.AWTError: Assistive Technology not found
i'm currently attaching to a java webstart application (anything from here: https://docs.oracle.com/javase/tutorial/uiswing/examples/misc/index.html#security) using the Java Attach API.
That works without problems, but now i want to iterate over all available Frames using
for (Frame f : java.awt.Frame.getFrames())
But this results in
java.lang.NullPointerException
at java.awt.Window.getWindows(Unknown Source)
at java.awt.Window.getWindows(Unknown Source)
at java.awt.Frame.getFrames(Unknown Source)
at com.asc.screen.scan.javascan.javascanagent.util.GuiWalkerTexasRanger.walkGui(GuiWalkerTexasRanger.java:151)
at com.asc.screen.scan.javascan.javascanagent.ComponentRegistry.initialScan(ComponentRegistry.java:124)
at com.asc.screen.scan.javascan.javascanagent.ComponentRegistry.init(ComponentRegistry.java:76)
at com.asc.screen.scan.javascan.javascanagent.JavaScanAgent.loadFilter(JavaScanAgent.java:291)
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 sun.rmi.server.UnicastServerRef.dispatch(Unknown Source)
at sun.rmi.transport.Transport$1.run(Unknown Source)
at sun.rmi.transport.Transport$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at sun.rmi.transport.Transport.serviceCall(Unknown Source)
at sun.rmi.transport.tcp.TCPTransport.handleMessages(Unknown Source)
at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run0(Unknown Source)
at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.lambda$run$0(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
...
Maybe i'm missing something here, but shouldn't it be possible to access all frames within the applet? This method works fine for non applet applications.
The problem is that the error is thrown inside the java code, so there is no way for me to avoid or handle this nullpointer, and i'm not getting any frames back.
Thanks in advance.
I created a Java project to automate simulations in COMSOL Multiphysics. However, whenever I try to run the code, I'm hit with the following error.
java.lang.UnsatisfiedLinkError: com.comsol.nativejni.server.FlRunnable.createRunInfo(Lcom/comsol/nativejni/CPointer;)V
at com.comsol.nativejni.server.FlRunnable.createRunInfo(Native Method)
at com.comsol.nativejni.server.FlRunnable.<init>(Unknown Source)
at com.comsol.nativeutil.runnable.f.<init>(Unknown Source)
at com.comsol.model.method.GeomSequenceMethod$1.<init>(Unknown Source)
at com.comsol.model.method.GeomSequenceMethod.<init>(Unknown Source)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
at java.lang.reflect.Constructor.newInstance(Unknown Source)
at com.comsol.model.internal.impl.PrimitiveModelEntityImpl.a(Unknown Source)
at com.comsol.model.internal.impl.PrimitiveModelEntityImpl.bm(Unknown Source)
at com.comsol.model.internal.impl.GeomSequenceImpl.method(Unknown Source)
at com.comsol.model.internal.impl.GeomSequenceImpl.method(Unknown Source)
at com.comsol.model.internal.impl.ModelEntityImpl.c_(Unknown Source)
at com.comsol.model.internal.impl.ModelEntityImpl.tag(Unknown Source)
at com.comsol.model.internal.impl.GeomListImpl.doCreate(Unknown Source)
at com.comsol.model.internal.impl.GeomListImpl.a(Unknown Source)
at com.comsol.model.internal.impl.GeomListImpl$1.a(Unknown Source)
at com.comsol.model.internal.impl.GeomListImpl$1.execute(Unknown Source)
at com.comsol.model.clientserver.ClientManager$1.call(Unknown Source)
at java.util.concurrent.FutureTask.run(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
Failed to find methods for: com.comsol.model.internal.impl.GeomSequenceImpl
It looks like the compiler is looking for the libraries associated with the methods I'm using, which is weird because I added them to the project. Here's a photo of the project:
photo
I feel like there's something really simple that I'm missing but I can't figure it out. Thanks
"Select the Environment tab. Click the New button. Use the Name PATH (on Windows), LD_LIBRARY_PATH (on
Linux), or DYLD_LIBRARY_PATH (on Mac) and enter the following text in Value: /lib/
where is the directory where COMSOL Multiphysics is installed and
is one of win64/glnxa64/maci64 depending on your platform. Click Apply."
Whenever I start a JNLP WebStart Application with Java7 on OS X 10.8 I get the following message dialog:
Unable to create shortcut for XXXX
The console outputs the following exception:
java.io.FileNotFoundException: /Users/XXXX/Library/Application Support/Oracle/Java/Deployment/cache/6.0/37/6bb90625-129dd80a.icns (No such file or directory)
at java.io.FileInputStream.open(Native Method)
at java.io.FileInputStream.<init>(FileInputStream.java:138)
at java.io.FileInputStream.<init>(FileInputStream.java:97)
at com.sun.javaws.MacOSXShortcutUtil.copy(Unknown Source)
at com.sun.javaws.MacOSXShortcutUtil.createBundle(Unknown Source)
at com.sun.javaws.MacOSXLocalInstallHandler.createBundle(Unknown Source)
at com.sun.javaws.MacOSXLocalInstallHandler.createShortcuts(Unknown Source)
at com.sun.javaws.LocalInstallHandler.installShortcuts(Unknown Source)
at com.sun.javaws.LocalInstallHandler.performIntegration(Unknown Source)
at com.sun.javaws.LocalInstallHandler.install(Unknown Source)
at com.sun.javaws.Launcher.notifyLocalInstallHandler(Unknown Source)
at com.sun.javaws.Launcher.prepareResources(Unknown Source)
at com.sun.javaws.Launcher.prepareAllResources(Unknown Source)
at com.sun.javaws.Launcher.prepareToLaunch(Unknown Source)
at com.sun.javaws.Launcher.prepareToLaunch(Unknown Source)
at com.sun.javaws.Launcher.launch(Unknown Source)
at com.sun.javaws.Main.launchApp(Unknown Source)
at com.sun.javaws.Main.continueInSecureThread(Unknown Source)
at com.sun.javaws.Main.access$000(Unknown Source)
at com.sun.javaws.Main$1.run(Unknown Source)
at java.lang.Thread.run(Thread.java:722)
Cleaning cache, removing deployment cache does not help.
The shortcut-bug on OSX existed in Java 7u9.
It was fixed in 7u10. You probably need to update your JRE.
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