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ClassDefNoFound even though the jar that I'm dependent on is in my jar

I'm writing a LabyMod addon to create a shop bot for minecraft clients.
I've well succeeded to do so, at least in my dev-environement in eclipse. Now I wanted to publish it, and to do this, LabyMod provides a possibility to use gradle for wrapping up all stuff that is relevant to the addon in the addon jar, that can then simply be dragged into the "addons"-Folder.
However, when I do this, the plugin didn't appear in the plugin overview, and I found out that there was an error when loading the plugin (Class def not found). I use okhttp3 to send some web requests to my verification server, so I just added it in eclipse as dependent jar, but they were not included when gradle built the jar. So I wasn't very surprised with that, and looked for a possibility to add my dependencies to the jar directly.
I found out in the commments of the predefined build.gradle to simply put all files in a predefined "libs"-folder which seemed to be fine. Here's the issue: Although the jars definitely are a part of the jar, the classdefnotfound-thing still happenes. Here's what I mean.
JD-GUI says of my jar:
So, the jars definitely are there, and jd-gui can find them in the code as well, since you can click on the imports and get taken to the place where okhttp3 defined the imported class.
Here's however the error that I get, when trying to load the addon:
catching
java.lang.NoClassDefFoundError: okhttp3/OkHttpClient$Builder
at borg.locutus.grieferbot.utils.NetworkUtilities.sendGet(NetworkUtilities.java:70)
at borg.locutus.grieferbot.utils.NetworkUtilities.getPermissionLevelOfPlayer(NetworkUtilities.java:51)
at borg.locutus.grieferbot.GrieferBOTAddon.initPermissionLevel(GrieferBOTAddon.java:50)
at borg.locutus.grieferbot.GrieferBOTAddon.onEnable(GrieferBOTAddon.java:43)
at net.labymod.addon.AddonLoader.enableAddon(AddonLoader.java:349)
at net.labymod.addon.AddonLoader.enableAddons(AddonLoader.java:309)
at net.labymod.main.LabyMod.init(LabyMod.java:256)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at net.minecraftforge.fml.common.FMLModContainer.handleModStateEvent(FMLModContainer.java:560)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at com.google.common.eventbus.EventSubscriber.handleEvent(EventSubscriber.java:74)
at com.google.common.eventbus.SynchronizedEventSubscriber.handleEvent(SynchronizedEventSubscriber.java:47)
at com.google.common.eventbus.EventBus.dispatch(EventBus.java:322)
at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:304)
at com.google.common.eventbus.EventBus.post(EventBus.java:275)
at net.minecraftforge.fml.common.LoadController.sendEventToModContainer(LoadController.java:211)
at net.minecraftforge.fml.common.LoadController.propogateStateMessage(LoadController.java:189)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at com.google.common.eventbus.EventSubscriber.handleEvent(EventSubscriber.java:74)
at com.google.common.eventbus.SynchronizedEventSubscriber.handleEvent(SynchronizedEventSubscriber.java:47)
at com.google.common.eventbus.EventBus.dispatch(EventBus.java:322)
at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:304)
at com.google.common.eventbus.EventBus.post(EventBus.java:275)
at net.minecraftforge.fml.common.LoadController.distributeStateMessage(LoadController.java:118)
at net.minecraftforge.fml.common.Loader.initializeMods(Loader.java:737)
at net.minecraftforge.fml.client.FMLClientHandler.finishMinecraftLoading(FMLClientHandler.java:310)
at net.minecraft.client.Minecraft.func_71384_a(Minecraft.java:495)
at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:329)
at net.minecraft.client.main.Main.main(SourceFile:124)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at net.minecraft.launchwrapper.Launch.launch(Launch.java:135)
at net.minecraft.launchwrapper.Launch.main(Launch.java:28)
Caused by: java.lang.ClassNotFoundException: okhttp3.OkHttpClient$Builder
at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:191)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
... 44 more
Caused by: java.lang.NullPointerException
at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:182)
... 46 more
How can I make my jar find the missing dependencies?

You can't just put the dependency jars into the main jar. You need to shade the dependencies into them.

Connecting VisualVM to program running on OpenJDK 10 under windows 8.1 does not work

I am trying to profile my java application running on OpenJDK 10 using VisualVM 1.4.2 under windows 8.1 but when opening a connection to app in VisualVM, exception is thrown
java.lang.IllegalArgumentException: Unexpected composite type for ThreadInfo
at sun.management.ThreadInfoCompositeData.validateCompositeData(ThreadInfoCompositeData.java:372)
at sun.management.ThreadInfoCompositeData.getInstance(ThreadInfoCompositeData.java:68)
at java.lang.management.ThreadInfo.<init>(ThreadInfo.java:263)
at java.lang.management.ThreadInfo.from(ThreadInfo.java:794)
Caused: java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at sun.reflect.misc.Trampoline.invoke(MethodUtil.java:71)
at sun.reflect.GeneratedMethodAccessor5.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at sun.reflect.misc.MethodUtil.invoke(MethodUtil.java:275)
at com.sun.jmx.mbeanserver.DefaultMXBeanMappingFactory$CompositeBuilderViaFrom.fromCompositeData(DefaultMXBeanMappingFactory.java:1018)
Caused: java.io.InvalidObjectException: Failed to invoke from(CompositeData)
at com.sun.jmx.mbeanserver.DefaultMXBeanMappingFactory.invalidObjectException(DefaultMXBeanMappingFactory.java:1457)
at com.sun.jmx.mbeanserver.DefaultMXBeanMappingFactory$CompositeBuilderViaFrom.fromCompositeData(DefaultMXBeanMappingFactory.java:1021)
at com.sun.jmx.mbeanserver.DefaultMXBeanMappingFactory$CompositeMapping.fromNonNullOpenValue(DefaultMXBeanMappingFactory.java:919)
at com.sun.jmx.mbeanserver.DefaultMXBeanMappingFactory$NonNullMXBeanMapping.fromOpenValue(DefaultMXBeanMappingFactory.java:133)
at com.sun.jmx.mbeanserver.ConvertingMethod.fromOpenReturnValue(ConvertingMethod.java:131)
at com.sun.jmx.mbeanserver.MXBeanProxy.invoke(MXBeanProxy.java:168)
at javax.management.MBeanServerInvocationHandler.invoke(MBeanServerInvocationHandler.java:258)
Caused: java.lang.reflect.UndeclaredThrowableException
at com.sun.proxy.$Proxy13.getThreadInfo(Unknown Source)
at com.sun.tools.visualvm.jmx.impl.JmxSupport.isReadOnlyConnection(JmxSupport.java:126)
at com.sun.tools.visualvm.jmx.impl.JmxModelImpl.isTakeThreadDumpSupported(JmxModelImpl.java:369)
at com.sun.tools.visualvm.application.views.threads.ApplicationThreadsViewProvider.resolveThreads(ApplicationThreadsViewProvider.java:85)
at com.sun.tools.visualvm.application.views.threads.ApplicationThreadsViewProvider.supportsViewFor(ApplicationThreadsViewProvider.java:49)
at com.sun.tools.visualvm.application.views.threads.ApplicationThreadsViewProvider.supportsViewFor(ApplicationThreadsViewProvider.java:45)
at com.sun.tools.visualvm.core.ui.DataSourceViewsManager.getViews(DataSourceViewsManager.java:136)
at com.sun.tools.visualvm.core.ui.DataSourceWindowManager.openWindowAndAddView(DataSourceWindowManager.java:206)
at com.sun.tools.visualvm.core.ui.DataSourceWindowManager.access$000(DataSourceWindowManager.java:50)
at com.sun.tools.visualvm.core.ui.DataSourceWindowManager$2.run(DataSourceWindowManager.java:117)
at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1443)
at org.netbeans.modules.openide.util.GlobalLookup.execute(GlobalLookup.java:68)
at org.openide.util.lookup.Lookups.executeWith(Lookups.java:303)
[catch] at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:2058)
the issue seems very similar to Cannot open some applications in VisualVM but the accepted workaround doesn't work for me. Any suggestions, please?
Previous lower java versions worked, btw.
EDIT:
OracleJDK 11 does not work as well

It looks like you are hitting JDK bug JDK-8165005. Please upgrade JDK 8 to JDK 8u152 or newer.

Eclipse opening issue

I've been trying to open eclipse via SSH on a linux machine but I keep getting this error. I've tried clearing disk space and running eclipse with the -clean flag but no luck. I've included the stack trace below in case it helps with debugging my issue.
java.lang.IllegalArgumentException: Buffer size <= 0
at java.io.BufferedInputStream.<init>(BufferedInputStream.java:201)
at org.eclipse.osgi.framework.internal.reliablefile.ReliableFile.getInputStream(ReliableFile.java:272)
at org.eclipse.osgi.framework.internal.reliablefile.ReliableFileInputStream.<init>(ReliableFileInputStream.java:92)
at org.eclipse.osgi.framework.internal.reliablefile.ReliableFileInputStream.<init>(ReliableFileInputStream.java:66)
at org.eclipse.osgi.storagemanager.StorageManager.updateTable(StorageManager.java:487)
at org.eclipse.osgi.storagemanager.StorageManager.open(StorageManager.java:708)
at org.eclipse.osgi.storage.Storage.getChildStorageManager(Storage.java:1749)
at org.eclipse.osgi.storage.Storage.getInfoInputStream(Storage.java:1766)
at org.eclipse.osgi.storage.Storage.<init>(Storage.java:126)
at org.eclipse.osgi.storage.Storage.createStorage(Storage.java:85)
at org.eclipse.osgi.internal.framework.EquinoxContainer.<init>(EquinoxContainer.java:75)
at org.eclipse.osgi.launch.Equinox.<init>(Equinox.java:31)
at org.eclipse.core.runtime.adaptor.EclipseStarter.startup(EclipseStarter.java:295)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:231)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:497)
at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:648)
at org.eclipse.equinox.launcher.Main.basicRun(Main.java:603)
at org.eclipse.equinox.launcher.Main.run(Main.java:1465)
at org.eclipse.equinox.launcher.Main.main(Main.java:1438)

Java JPG codec won't work

I have problem with my tomcat application, after changing the server and installing the last version of tomcat7 my application won't read/load jpg files..
I installed imageio and jai on the server, try to change java version but every time I have the same error..
Anybody have an idea?
Error: One factory fails for the operation "jpeg"
Occurs in: javax.media.jai.ThreadSafeOperationRegistry
java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at javax.media.jai.FactoryCache.invoke(FactoryCache.java:122)
at javax.media.jai.OperationRegistry.invokeFactory(OperationRegistry.java:1674)
at javax.media.jai.ThreadSafeOperationRegistry.invokeFactory(ThreadSafeOperationRegistry.java:473)
at javax.media.jai.registry.RIFRegistry.create(RIFRegistry.java:332)
at com.sun.media.jai.opimage.StreamRIF.create(StreamRIF.java:102)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at javax.media.jai.FactoryCache.invoke(FactoryCache.java:122)
at javax.media.jai.OperationRegistry.invokeFactory(OperationRegistry.java:1674)
at javax.media.jai.ThreadSafeOperationRegistry.invokeFactory(ThreadSafeOperationRegistry.java:473)
at javax.media.jai.registry.RIFRegistry.create(RIFRegistry.java:332)
at javax.media.jai.RenderedOp.createInstance(RenderedOp.java:819)
at javax.media.jai.RenderedOp.createRendering(RenderedOp.java:867)
at javax.media.jai.RenderedOp.getWidth(RenderedOp.java:2179)
The whole error log can be found here -> http://paste.ubuntu.com/7653452/.
Update: The problem is related to grails plugin called ImageTools

If you look at the code for JPEGImageDecoder you'll see it depends on com.sun.image.codec.jpeg.ImageFormatException in its imports.
However, com.sun.image.codec.jpeg was removed from Java 7 onwards.
So likely the problem is that JAI is simply out of date, and you would have to use a Java 6 runtime to use it.

No such method error only in raspberry pi

fed up with raspberry pi.....
i have created a javaFX application from windows 7 using netbeans 7.3.1 , jdk 1.7 ..
application has included some external jar including javafx-dialogs-0.0.3,jaybird etc..
its all works fine with windows 7,ubuntu and centOS
Then i tried to run the same application jar from command line in raspberry pi..
but it gives Exception like "noSuchMethoderror " and exiting the application..
what may be the issue ???
am using same jar during comple and run time..
here is full stack
Exception in Application start method
java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:483)
at com.sun.javafx.application.LauncherImpl.launchApplicationWithArgs(LauncherImpl.java:367)
at com.sun.javafx.application.LauncherImpl.launchApplication(LauncherImpl.java:305)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:483)
at sun.launcher.LauncherHelper$FXHelper.main(LauncherHelper.java:767)
Caused by: java.lang.RuntimeException: Exception in Application start method
at com.sun.javafx.application.LauncherImpl.launchApplication1(LauncherImpl.java:894)
at com.sun.javafx.application.LauncherImpl.access$000(LauncherImpl.java:56)
at com.sun.javafx.application.LauncherImpl$1.run(LauncherImpl.java:158)
at java.lang.Thread.run(Thread.java:744)
Caused by: java.lang.NoSuchMethodError: com.sun.javafx.css.StyleManager.getPseudoclassMask(Ljava/lang/String;)J
at javafx.scene.control.Dialogs$FXDialog$RootPane.<clinit>(Dialogs.java:1310)
at javafx.scene.control.Dialogs$FXDialog.<init>(Dialogs.java:1131)
at javafx.scene.control.Dialogs$FXDialog.<init>(Dialogs.java:1088)
at javafx.scene.control.Dialogs$DialogTemplate.<init>(Dialogs.java:616)
at javafx.scene.control.Dialogs.showSimpleContentDialog(Dialogs.java:494)
at javafx.scene.control.Dialogs.showInformationDialog(Dialogs.java:266)
at displayshelftry.Utilities.propertySettings(Utilities.java:325)
at displayshelftry.DisplayShelfTry.run(DisplayShelfTry.java:356)
at displayshelftry.DisplayShelfTry.start(DisplayShelfTry.java:1150)
at com.sun.javafx.application.LauncherImpl$8.run(LauncherImpl.java:837)
at com.sun.javafx.application.PlatformImpl$7.run(PlatformImpl.java:331)
at com.sun.javafx.application.PlatformImpl$6$1.run(PlatformImpl.java:297)
at com.sun.javafx.application.PlatformImpl$6$1.run(PlatformImpl.java:294)
at java.security.AccessController.doPrivileged(Native Method)
at com.sun.javafx.application.PlatformImpl$6.run(PlatformImpl.java:294)
at com.sun.glass.ui.lens.LensApplication$RunnableEvent.dispatch(LensApplication.java:182)
at com.sun.glass.ui.lens.LensApplication._runLoop(LensApplication.java:861)
at com.sun.glass.ui.lens.LensApplication.access$1700(LensApplication.java:58)
at com.sun.glass.ui.lens.LensApplication$4.run(LensApplication.java:914)
... 1 more
thanks...

Try building you app with jdk8. jdk8 usually should run jdk7 built jars as well, but it's not yet released and rasberry pi was supported only since jdk8.
Also official pi vs javafx page claims that not all demos will work on pi (note it's not yet released product): https://wiki.openjdk.java.net/display/OpenJFX/OpenJFX+on+the+Raspberry+Pi
So you may want to try BrickBreaker instead of DisplayShelf :)