Develop Reference

builded maven's jar dosn't work

I'm new in JavaFX. I created JavaFX project with maven and I add all dependecies. Project in idea works perfectly but when I build it in maven and try to open in target folder jar dosn't react and it gives following errors.
java.lang.ClassNotFoundException: com.mysql.cj.jdbc.Driver
at java.net.URLClassLoader$1.run(Unknown Source)
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Unknown Source)
at sample.JdbcPlainTest.createConnection(JdbcPlainTest.java:21)
at sample.JdbcPlainTest.ProductsSelectQuery(JdbcPlainTest.java:84)
at sample.Controller.initialize(Controller.java:84)
at javafx.fxml.FXMLLoader.loadImpl(Unknown Source)
at javafx.fxml.FXMLLoader.loadImpl(Unknown Source)
at javafx.fxml.FXMLLoader.loadImpl(Unknown Source)
at javafx.fxml.FXMLLoader.loadImpl(Unknown Source)
at javafx.fxml.FXMLLoader.loadImpl(Unknown Source)
at javafx.fxml.FXMLLoader.loadImpl(Unknown Source)
at javafx.fxml.FXMLLoader.loadImpl(Unknown Source)
at javafx.fxml.FXMLLoader.load(Unknown Source)
at sample.Main.start(Main.java:14)
at com.sun.javafx.application.LauncherImpl.lambda$launchApplication1$153
(Unknown Source)
at com.sun.javafx.application.LauncherImpl$$Lambda$51/881058039.run(Unkn
own Source)
at com.sun.javafx.application.PlatformImpl.lambda$runAndWait$166(Unknown
Source)
at com.sun.javafx.application.PlatformImpl$$Lambda$45/584634336.run(Unkn
own Source)
at com.sun.javafx.application.PlatformImpl.lambda$null$164(Unknown Sourc
e)
at com.sun.javafx.application.PlatformImpl$$Lambda$47/474818150.run(Unkn
own Source)
at java.security.AccessController.doPrivileged(Native Method)
at com.sun.javafx.application.PlatformImpl.lambda$runLater$165(Unknown S
ource)
at com.sun.javafx.application.PlatformImpl$$Lambda$46/501263526.run(Unkn
own Source)
at com.sun.glass.ui.InvokeLaterDispatcher$Future.run(Unknown Source)
at com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
at com.sun.glass.ui.win.WinApplication.lambda$null$141(Unknown Source)
at com.sun.glass.ui.win.WinApplication$$Lambda$37/96639997.run(Unknown S
ource)
at java.lang.Thread.run(Unknown Source) Exception in Application start method java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at com.sun.javafx.application.LauncherImpl.launchApplicationWithArgs(Unk
nown Source)
at com.sun.javafx.application.LauncherImpl.launchApplication(Unknown Sou
rce)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at sun.launcher.LauncherHelper$FXHelper.main(Unknown Source) Caused by: java.lang.RuntimeException: Exception in Application start
method
at com.sun.javafx.application.LauncherImpl.launchApplication1(Unknown So
urce)
at com.sun.javafx.application.LauncherImpl.lambda$launchApplication$147(
Unknown Source)
at com.sun.javafx.application.LauncherImpl$$Lambda$48/815033865.run(Unkn
own Source)
at java.lang.Thread.run(Unknown Source) Caused by: javafx.fxml.LoadException:
file:/D:/work%20proyeqt%20immidetely/JASMIN/Qassa%20-%20CopyWORKING/target/Qassa
Copy-1.0-SNAPSHOT.jar!/sample.fxml
at javafx.fxml.FXMLLoader.constructLoadException(Unknown Source)
at javafx.fxml.FXMLLoader.loadImpl(Unknown Source)
at javafx.fxml.FXMLLoader.loadImpl(Unknown Source)
at javafx.fxml.FXMLLoader.loadImpl(Unknown Source)
at javafx.fxml.FXMLLoader.loadImpl(Unknown Source)
at javafx.fxml.FXMLLoader.loadImpl(Unknown Source)
at javafx.fxml.FXMLLoader.loadImpl(Unknown Source)
at javafx.fxml.FXMLLoader.loadImpl(Unknown Source)
at javafx.fxml.FXMLLoader.load(Unknown Source)
at sample.Main.start(Main.java:14)
at com.sun.javafx.application.LauncherImpl.lambda$launchApplication1$153
(Unknown Source)
at com.sun.javafx.application.LauncherImpl$$Lambda$51/881058039.run(Unkn
own Source)
at com.sun.javafx.application.PlatformImpl.lambda$runAndWait$166(Unknown
Source)
at com.sun.javafx.application.PlatformImpl$$Lambda$45/584634336.run(Unkn
own Source)
at com.sun.javafx.application.PlatformImpl.lambda$null$164(Unknown Sourc
e)
at com.sun.javafx.application.PlatformImpl$$Lambda$47/474818150.run(Unkn
own Source)
at java.security.AccessController.doPrivileged(Native Method)
at com.sun.javafx.application.PlatformImpl.lambda$runLater$165(Unknown S
ource)
at com.sun.javafx.application.PlatformImpl$$Lambda$46/501263526.run(Unkn
own Source)
at com.sun.glass.ui.InvokeLaterDispatcher$Future.run(Unknown Source)
at com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
at com.sun.glass.ui.win.WinApplication.lambda$null$141(Unknown Source)
at com.sun.glass.ui.win.WinApplication$$Lambda$37/96639997.run(Unknown S
ource)
... 1 more Caused by: java.lang.NullPointerException
at sample.JdbcPlainTest.ProductsSelectQuery(JdbcPlainTest.java:108)
at sample.Controller.initialize(Controller.java:84)
... 23 more Exception running application sample.Main

seems your dependencies are not included into your jar. Open your .jar and see whether all the dependency classes (like com.mysql.cj.jdbc.Driver) are inside. If they are not please see, Including dependencies in a jar with Maven.

Getting errors whenever I click on the choicebox

I created a ChoiceBox object called backgroundChoiceBox. I added the following code to my controller class:
#FXML
private ChoiceBox<String> backgroundChoiceBox = new ChoiceBox<>();
In the initialize method, I added these two lines of code:
backgroundChoiceBox.getItems().addAll("Trees", "Mountains");
backgroundChoiceBox.setValue("Trees");
When I run the program, the choice box appears with no errors being sent to the console. When I click on the choice box however, I receive the following errors.
Exception in thread "JavaFX Application Thread" java.lang.IllegalArgumentException: argument type mismatch
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.reflect.misc.Trampoline.invoke(Unknown Source)
at sun.reflect.GeneratedMethodAccessor1.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at sun.reflect.misc.MethodUtil.invoke(Unknown Source)
at javafx.fxml.FXMLLoader$MethodHandler.invoke(Unknown Source)
at javafx.fxml.FXMLLoader$ControllerMethodEventHandler.handle(Unknown Source)
at com.sun.javafx.event.CompositeEventHandler.dispatchBubblingEvent(Unknown Source)
at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(Unknown Source)
at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(Unknown Source)
at com.sun.javafx.event.CompositeEventDispatcher.dispatchBubblingEvent(Unknown Source)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(Unknown Source)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(Unknown Source)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(Unknown Source)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(Unknown Source)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(Unknown Source)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(Unknown Source)
at com.sun.javafx.event.EventUtil.fireEventImpl(Unknown Source)
at com.sun.javafx.event.EventUtil.fireEvent(Unknown Source)
at javafx.event.Event.fireEvent(Unknown Source)
at javafx.scene.Scene$ClickGenerator.postProcess(Unknown Source)
at javafx.scene.Scene$ClickGenerator.access$8100(Unknown Source)
at javafx.scene.Scene$MouseHandler.process(Unknown Source)
at javafx.scene.Scene$MouseHandler.access$1500(Unknown Source)
at javafx.scene.Scene.impl_processMouseEvent(Unknown Source)
at javafx.scene.Scene$ScenePeerListener.mouseEvent(Unknown Source)
at com.sun.javafx.tk.quantum.GlassViewEventHandler$MouseEventNotification.run(Unknown Source)
at com.sun.javafx.tk.quantum.GlassViewEventHandler$MouseEventNotification.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at com.sun.javafx.tk.quantum.GlassViewEventHandler.lambda$handleMouseEvent$354(Unknown Source)
at com.sun.javafx.tk.quantum.QuantumToolkit.runWithoutRenderLock(Unknown Source)
at com.sun.javafx.tk.quantum.GlassViewEventHandler.handleMouseEvent(Unknown Source)
at com.sun.glass.ui.View.handleMouseEvent(Unknown Source)
at com.sun.glass.ui.View.notifyMouse(Unknown Source)
at com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
at com.sun.glass.ui.win.WinApplication.lambda$null$148(Unknown Source)
at java.lang.Thread.run(Unknown Source)
My options for Trees and Mountains still show up and allow me to click them, but it results in the same sequence of errors appearing. If anyone could help explain why this is happening that would be great! Thanks in advance

The initialization of you ChoiceBox should be handled by your FXML file.
For example:
<ChoiceBox fx:id="backgroundChoiceBox" value="Trees">
<items>
<FXCollections fx:factory="observableArrayList">
<String fx:value="Trees" />
<String fx:value="Mountains" />
</FXCollections>
</items>
</ChoiceBox>
You are currently initializing your ChoiceBox twice. Once in the FXML file and once in the controller.
Remove = new ChoiceBox<>(); from your controller class and remove the corresponding
backgroundChoiceBox.getItems().addAll("Trees", "Mountains");
backgroundChoiceBox.setValue("Trees");
from your initialization method. After that your choiceAction method should work without an exception.

access denied ("java.lang.RuntimePermission" "loadLibrary.sunec"

getting below access permission exception while encrypting from a applet.
Please help .
Error :
security: Loading Root CA certificates from C:\Program Files\Java\jre7\lib\security\cacerts
basic: error: null.
java.lang.ExceptionInInitializerError
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 java.lang.Class.newInstance(Unknown Source)
at sun.security.jca.ProviderConfig$2.run(Unknown Source)
at sun.security.jca.ProviderConfig$2.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at sun.security.jca.ProviderConfig.doLoadProvider(Unknown Source)
at sun.security.jca.ProviderConfig.getProvider(Unknown Source)
at sun.security.jca.ProviderList.getProvider(Unknown Source)
at sun.security.jca.ProviderList.getService(Unknown Source)
at sun.security.jca.GetInstance.getInstance(Unknown Source)
at java.security.Security.getImpl(Unknown Source)
at java.security.AlgorithmParameters.getInstance(Unknown Source)
at sun.security.x509.AlgorithmId.decodeParams(Unknown Source)
at sun.security.x509.AlgorithmId.<init>(Unknown Source)
at sun.security.x509.AlgorithmId.parse(Unknown Source)
at sun.security.x509.X509Key.parse(Unknown Source)
at sun.security.x509.CertificateX509Key.<init>(Unknown Source)
at sun.security.x509.X509CertInfo.parse(Unknown Source)
at sun.security.x509.X509CertInfo.<init>(Unknown Source)
at sun.security.x509.X509CertImpl.parse(Unknown Source)
at sun.security.x509.X509CertImpl.<init>(Unknown Source)
at sun.security.provider.X509Factory.engineGenerateCertificate(Unknown Source)
at java.security.cert.CertificateFactory.generateCertificate(Unknown Source)
at sun.security.provider.JavaKeyStore.engineLoad(Unknown Source)
at sun.security.provider.JavaKeyStore$JKS.engineLoad(Unknown Source)
at java.security.KeyStore.load(Unknown Source)
at com.sun.deploy.security.RootCertStore$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at com.sun.deploy.security.RootCertStore.loadCertStore(Unknown Source)
at com.sun.deploy.security.RootCertStore.load(Unknown Source)
at com.sun.deploy.security.RootCertStore.load(Unknown Source)
at com.sun.deploy.security.ImmutableCertStore.load(Unknown Source)
at com.sun.deploy.security.LazyRootStore.loadJREStores(Unknown Source)
at com.sun.deploy.security.LazyRootStore.getTrustAnchors(Unknown Source)
at com.sun.deploy.security.TrustDecider.getValidationState(Unknown Source)
at com.sun.deploy.security.TrustDecider.validateChain(Unknown Source)
at com.sun.deploy.security.TrustDecider.isAllPermissionGranted(Unknown Source)
at sun.plugin2.applet.Plugin2ClassLoader.isTrustedByTrustDecider(Unknown Source)
at sun.plugin2.applet.Plugin2ClassLoader.getTrustedCodeSources(Unknown Source)
at com.sun.deploy.security.CPCallbackHandler$ParentCallback.strategy(Unknown Source)
at com.sun.deploy.security.CPCallbackHandler$ParentCallback.openClassPathElement(Unknown Source)
at com.sun.deploy.security.DeployURLClassPath$JarLoader.getJarFile(Unknown Source)
at com.sun.deploy.security.DeployURLClassPath$JarLoader.access$1000(Unknown Source)
at com.sun.deploy.security.DeployURLClassPath$JarLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at com.sun.deploy.security.DeployURLClassPath$JarLoader.ensureOpen(Unknown Source)
at com.sun.deploy.security.DeployURLClassPath$JarLoader.<init>(Unknown Source)
at com.sun.deploy.security.DeployURLClassPath$3.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at com.sun.deploy.security.DeployURLClassPath.getLoader(Unknown Source)
at com.sun.deploy.security.DeployURLClassPath.getLoader(Unknown Source)
at com.sun.deploy.security.DeployURLClassPath.getResource(Unknown Source)
at sun.plugin2.applet.Plugin2ClassLoader$2.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at sun.plugin2.applet.Plugin2ClassLoader.findClassHelper(Unknown Source)
at sun.plugin2.applet.Applet2ClassLoader.findClass(Unknown Source)
at sun.plugin2.applet.Plugin2ClassLoader.loadClass0(Unknown Source)
at sun.plugin2.applet.Plugin2ClassLoader.loadClass(Unknown Source)
at sun.plugin2.applet.Plugin2ClassLoader.loadClass0(Unknown Source)
at sun.plugin2.applet.Plugin2ClassLoader.loadClass(Unknown Source)
at sun.plugin2.applet.Plugin2ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.plugin2.applet.Plugin2ClassLoader.loadCode(Unknown Source)
at sun.plugin2.applet.Plugin2Manager.initAppletAdapter(Unknown Source)
at sun.plugin2.applet.Plugin2Manager$AppletExecutionRunnable.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
Caused by: java.security.AccessControlException: access denied ("java.lang.RuntimePermission" "loadLibrary.sunec")
at java.security.AccessControlContext.checkPermission(Unknown Source)
at java.security.AccessController.checkPermission(Unknown Source)
at java.lang.SecurityManager.checkPermission(Unknown Source)
at sun.plugin2.applet.AWTAppletSecurityManager.checkPermission(Unknown Source)
at java.lang.SecurityManager.checkLink(Unknown Source)
at java.lang.Runtime.loadLibrary0(Unknown Source)
at java.lang.System.loadLibrary(Unknown Source)
at sun.security.ec.SunEC$1.run(SunEC.java:60)
at sun.security.ec.SunEC$1.run(SunEC.java:58)
at java.security.AccessController.doPrivileged(Native Method)
at sun.security.ec.SunEC.<clinit>(SunEC.java:58)
... 69 more"
security: Reset deny session certificate store
basic: Removed progress listener: sun.plugin.util.ProgressMonitorAdapter#c4f9e6
security: Reset deny session certificate store

GWT-comet build fails with ClassNotFoundException

I've tried to setup GWT-comet using the official guide(http://code.google.com/p/gwt-comet/wiki/GettingStarted). What I did:
Add gwt-comet-1.2.3.jar to project and build path.
Setup the basic client and server code.
Inherit the required module.
< inherits name='net.zschech.gwt.comet.Comet'/>
The crash is obviously related to the inheriting the module. Stack trace:
Loading modules
com.MyApp.Test
Loading inherited module 'com.MyApp.Test'
Loading inherited module 'net.zschech.gwt.comet.Comet'
[ERROR] Unexpected error while processing XML
java.lang.NoClassDefFoundError: com/google/gwt/core/ext/GeneratorExt
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:800)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
at java.net.URLClassLoader.defineClass(URLClassLoader.java:449)
at java.net.URLClassLoader.access$100(URLClassLoader.java:71)
at java.net.URLClassLoader$1.run(URLClassLoader.java:361)
at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
at java.lang.ClassLoader.loadClass(ClassLoader.java:425)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
at com.google.gwt.dev.cfg.ModuleDefSchema$ClassAttrCvt.convertToArg(ModuleDefSchema.java:888)
at com.google.gwt.dev.util.xml.HandlerArgs.convertToArg(HandlerArgs.java:64)
at com.google.gwt.dev.util.xml.HandlerMethod.invokeBegin(HandlerMethod.java:221)
at com.google.gwt.dev.util.xml.ReflectiveParser$Impl.startElement(ReflectiveParser.java:294)
at org.apache.xerces.parsers.AbstractSAXParser.startElement(Unknown Source)
at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanStartElement(Unknown Source)
at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl$FragmentContentDispatcher.dispatch(Unknown Source)
at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown Source)
at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)
at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)
at org.apache.xerces.parsers.XMLParser.parse(Unknown Source)
at org.apache.xerces.parsers.AbstractSAXParser.parse(Unknown Source)
at org.apache.xerces.jaxp.SAXParserImpl$JAXPSAXParser.parse(Unknown Source)
at com.google.gwt.dev.util.xml.ReflectiveParser$Impl.parse(ReflectiveParser.java:347)
at com.google.gwt.dev.util.xml.ReflectiveParser$Impl.access$200(ReflectiveParser.java:68)
at com.google.gwt.dev.util.xml.ReflectiveParser.parse(ReflectiveParser.java:418)
at com.google.gwt.dev.cfg.ModuleDefLoader.nestedLoad(ModuleDefLoader.java:333)
at com.google.gwt.dev.cfg.ModuleDefSchema$BodySchema.__inherits_begin(ModuleDefSchema.java:497)
at sun.reflect.GeneratedMethodAccessor6.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at com.google.gwt.dev.util.xml.HandlerMethod.invokeBegin(HandlerMethod.java:230)
at com.google.gwt.dev.util.xml.ReflectiveParser$Impl.startElement(ReflectiveParser.java:294)
at org.apache.xerces.parsers.AbstractSAXParser.startElement(Unknown Source)
at org.apache.xerces.parsers.AbstractXMLDocumentParser.emptyElement(Unknown Source)
at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanStartElement(Unknown Source)
at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl$FragmentContentDispatcher.dispatch(Unknown Source)
at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown Source)
at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)
at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)
at org.apache.xerces.parsers.XMLParser.parse(Unknown Source)
at org.apache.xerces.parsers.AbstractSAXParser.parse(Unknown Source)
at org.apache.xerces.jaxp.SAXParserImpl$JAXPSAXParser.parse(Unknown Source)
at com.google.gwt.dev.util.xml.ReflectiveParser$Impl.parse(ReflectiveParser.java:347)
at com.google.gwt.dev.util.xml.ReflectiveParser$Impl.access$200(ReflectiveParser.java:68)
at com.google.gwt.dev.util.xml.ReflectiveParser.parse(ReflectiveParser.java:418)
at com.google.gwt.dev.cfg.ModuleDefLoader.nestedLoad(ModuleDefLoader.java:333)
at com.google.gwt.dev.cfg.ModuleDefLoader.load(ModuleDefLoader.java:254)
at com.google.gwt.dev.cfg.ModuleDefLoader.doLoadModule(ModuleDefLoader.java:197)
at com.google.gwt.dev.cfg.ModuleDefLoader.loadFromResources(ModuleDefLoader.java:157)
at com.google.gwt.dev.cfg.ModuleDefLoader.loadFromClassPath(ModuleDefLoader.java:132)
at com.google.gwt.dev.DevModeBase.loadModule(DevModeBase.java:1026)
at com.google.gwt.dev.DevMode.loadModule(DevMode.java:570)
at com.google.gwt.dev.DevMode.doStartup(DevMode.java:456)
at com.google.gwt.dev.DevModeBase.startUp(DevModeBase.java:1094)
at com.google.gwt.dev.DevModeBase.run(DevModeBase.java:844)
at com.google.gwt.dev.DevMode.main(DevMode.java:322)
Caused by: java.lang.ClassNotFoundException: com.google.gwt.core.ext.GeneratorExt
at java.net.URLClassLoader$1.run(URLClassLoader.java:366)
at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
at java.lang.ClassLoader.loadClass(ClassLoader.java:425)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
... 59 more
[ERROR] Line 11: Unexpected exception while processing element 'inherits'
com.google.gwt.core.ext.UnableToCompleteException: (see previous log entries)
at com.google.gwt.dev.cfg.ModuleDefLoader.nestedLoad(ModuleDefLoader.java:336)
at com.google.gwt.dev.cfg.ModuleDefSchema$BodySchema.__inherits_begin(ModuleDefSchema.java:497)
at sun.reflect.GeneratedMethodAccessor6.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at com.google.gwt.dev.util.xml.HandlerMethod.invokeBegin(HandlerMethod.java:230)
at com.google.gwt.dev.util.xml.ReflectiveParser$Impl.startElement(ReflectiveParser.java:294)
at org.apache.xerces.parsers.AbstractSAXParser.startElement(Unknown Source)
at org.apache.xerces.parsers.AbstractXMLDocumentParser.emptyElement(Unknown Source)
at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanStartElement(Unknown Source)
at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl$FragmentContentDispatcher.dispatch(Unknown Source)
at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown Source)
at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)
at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)
at org.apache.xerces.parsers.XMLParser.parse(Unknown Source)
at org.apache.xerces.parsers.AbstractSAXParser.parse(Unknown Source)
at org.apache.xerces.jaxp.SAXParserImpl$JAXPSAXParser.parse(Unknown Source)
at com.google.gwt.dev.util.xml.ReflectiveParser$Impl.parse(ReflectiveParser.java:347)
at com.google.gwt.dev.util.xml.ReflectiveParser$Impl.access$200(ReflectiveParser.java:68)
at com.google.gwt.dev.util.xml.ReflectiveParser.parse(ReflectiveParser.java:418)
at com.google.gwt.dev.cfg.ModuleDefLoader.nestedLoad(ModuleDefLoader.java:333)
at com.google.gwt.dev.cfg.ModuleDefLoader.load(ModuleDefLoader.java:254)
at com.google.gwt.dev.cfg.ModuleDefLoader.doLoadModule(ModuleDefLoader.java:197)
at com.google.gwt.dev.cfg.ModuleDefLoader.loadFromResources(ModuleDefLoader.java:157)
at com.google.gwt.dev.cfg.ModuleDefLoader.loadFromClassPath(ModuleDefLoader.java:132)
at com.google.gwt.dev.DevModeBase.loadModule(DevModeBase.java:1026)
at com.google.gwt.dev.DevMode.loadModule(DevMode.java:570)
at com.google.gwt.dev.DevMode.doStartup(DevMode.java:456)
at com.google.gwt.dev.DevModeBase.startUp(DevModeBase.java:1094)
at com.google.gwt.dev.DevModeBase.run(DevModeBase.java:844)
at com.google.gwt.dev.DevMode.main(DevMode.java:322)
[ERROR] Failure while parsing XML
com.google.gwt.core.ext.UnableToCompleteException: (see previous log entries)
at com.google.gwt.dev.util.xml.DefaultSchema.onHandlerException(DefaultSchema.java:58)
at com.google.gwt.dev.util.xml.Schema.onHandlerException(Schema.java:66)
at com.google.gwt.dev.util.xml.Schema.onHandlerException(Schema.java:66)
at com.google.gwt.dev.util.xml.HandlerMethod.invokeBegin(HandlerMethod.java:240)
at com.google.gwt.dev.util.xml.ReflectiveParser$Impl.startElement(ReflectiveParser.java:294)
at org.apache.xerces.parsers.AbstractSAXParser.startElement(Unknown Source)
at org.apache.xerces.parsers.AbstractXMLDocumentParser.emptyElement(Unknown Source)
at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanStartElement(Unknown Source)
at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl$FragmentContentDispatcher.dispatch(Unknown Source)
at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown Source)
at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)
at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)
at org.apache.xerces.parsers.XMLParser.parse(Unknown Source)
at org.apache.xerces.parsers.AbstractSAXParser.parse(Unknown Source)
at org.apache.xerces.jaxp.SAXParserImpl$JAXPSAXParser.parse(Unknown Source)
at com.google.gwt.dev.util.xml.ReflectiveParser$Impl.parse(ReflectiveParser.java:347)
at com.google.gwt.dev.util.xml.ReflectiveParser$Impl.access$200(ReflectiveParser.java:68)
at com.google.gwt.dev.util.xml.ReflectiveParser.parse(ReflectiveParser.java:418)
at com.google.gwt.dev.cfg.ModuleDefLoader.nestedLoad(ModuleDefLoader.java:333)
at com.google.gwt.dev.cfg.ModuleDefLoader.load(ModuleDefLoader.java:254)
at com.google.gwt.dev.cfg.ModuleDefLoader.doLoadModule(ModuleDefLoader.java:197)
at com.google.gwt.dev.cfg.ModuleDefLoader.loadFromResources(ModuleDefLoader.java:157)
at com.google.gwt.dev.cfg.ModuleDefLoader.loadFromClassPath(ModuleDefLoader.java:132)
at com.google.gwt.dev.DevModeBase.loadModule(DevModeBase.java:1026)
at com.google.gwt.dev.DevMode.loadModule(DevMode.java:570)
at com.google.gwt.dev.DevMode.doStartup(DevMode.java:456)
at com.google.gwt.dev.DevModeBase.startUp(DevModeBase.java:1094)
at com.google.gwt.dev.DevModeBase.run(DevModeBase.java:844)
at com.google.gwt.dev.DevMode.main(DevMode.java:322)
[ERROR] Unexpected error while processing XML
com.google.gwt.core.ext.UnableToCompleteException: (see previous log entries)
at com.google.gwt.dev.util.xml.ReflectiveParser$Impl.parse(ReflectiveParser.java:371)
at com.google.gwt.dev.util.xml.ReflectiveParser$Impl.access$200(ReflectiveParser.java:68)
at com.google.gwt.dev.util.xml.ReflectiveParser.parse(ReflectiveParser.java:418)
at com.google.gwt.dev.cfg.ModuleDefLoader.nestedLoad(ModuleDefLoader.java:333)
at com.google.gwt.dev.cfg.ModuleDefLoader.load(ModuleDefLoader.java:254)
at com.google.gwt.dev.cfg.ModuleDefLoader.doLoadModule(ModuleDefLoader.java:197)
at com.google.gwt.dev.cfg.ModuleDefLoader.loadFromResources(ModuleDefLoader.java:157)
at com.google.gwt.dev.cfg.ModuleDefLoader.loadFromClassPath(ModuleDefLoader.java:132)
at com.google.gwt.dev.DevModeBase.loadModule(DevModeBase.java:1026)
at com.google.gwt.dev.DevMode.loadModule(DevMode.java:570)
at com.google.gwt.dev.DevMode.doStartup(DevMode.java:456)
at com.google.gwt.dev.DevModeBase.startUp(DevModeBase.java:1094)
at com.google.gwt.dev.DevModeBase.run(DevModeBase.java:844)
at com.google.gwt.dev.DevMode.main(DevMode.java:322)
[ERROR] shell failed in doStartup method
Any idea why this occurs? Thanks in advance.

The gwt-comet-1.2.3.jar is not compatible with GWT 2.5.0-rc1 (or higher).
so you need to upgrade the gwt-comet version to 1.2.5.
link : https://gwt-comet.googlecode.com/issues/attachment?aid=330005000&name=gwt-comet-1.2.5.jar&token=St1Wda3HoyBJfRyZZ-Vq3zQibKo%3A1398940143165

The problem is a space that's why you are getting below exception:
[ERROR] Unexpected error while processing XML
[ERROR] Line 11: Unexpected exception while processing element 'inherits'
use
<inherits name="net.zschech.gwt.comet.Comet" />
instead of
< inherits name="net.zschech.gwt.comet.Comet" />
--EDIT--
Caused by: java.lang.ClassNotFoundException: com.google.gwt.core.ext.GeneratorExt
Look at below discussions on Google-web-toolkit
NoClassDefFoundError: GeneratorExt with 2.5.0 FINAL
Can't launch SuperDevMode on project: NoClassDefFoundError: GeneratorExt

JNLP Launching error

I have jnlp application installed on remote client computer. Everyting was OK since today, when i without reinstall or restart tomcat server. The client pc gets following error:
com.sun.deploy.net.FailedDownloadException: Unable to load resource: http://112.92.56.120:8080/CrownX/libs/axis2/axis2-transport-http-1.5.1.jar
at com.sun.deploy.net.DownloadEngine.actionDownload(Unknown Source)
at com.sun.deploy.net.DownloadEngine.getCacheEntry(Unknown Source)
at com.sun.deploy.net.DownloadEngine.getCacheEntry(Unknown Source)
at com.sun.deploy.net.DownloadEngine.getResourceCacheEntry(Unknown Source)
at com.sun.deploy.net.DownloadEngine.getResourceCacheEntry(Unknown Source)
at com.sun.deploy.net.DownloadEngine.getResource(Unknown Source)
at com.sun.javaws.LaunchDownload.downloadJarFiles(Unknown Source)
at com.sun.javaws.LaunchDownload.downloadEagerorAll(Unknown Source)
at com.sun.javaws.Launcher.downloadResources(Unknown Source)
at com.sun.javaws.Launcher.prepareLaunchFile(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$1.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
java.io.IOException: index file not found
at com.sun.deploy.cache.CacheEntry$9.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at com.sun.deploy.cache.CacheEntry.writeFileToDisk(Unknown Source)
at com.sun.deploy.cache.CacheEntry.writeFileToDisk(Unknown Source)
at com.sun.deploy.cache.Cache.downloadResourceToTempFile(Unknown Source)
at com.sun.deploy.cache.Cache.downloadResourceToCache(Unknown Source)
at com.sun.deploy.net.DownloadEngine.actionDownload(Unknown Source)
at com.sun.deploy.net.DownloadEngine.getCacheEntry(Unknown Source)
at com.sun.deploy.net.DownloadEngine.getCacheEntry(Unknown Source)
at com.sun.deploy.net.DownloadEngine.getResourceCacheEntry(Unknown Source)
at com.sun.deploy.net.DownloadEngine.getResourceCacheEntry(Unknown Source)
at com.sun.deploy.net.DownloadEngine.getResource(Unknown Source)
at com.sun.javaws.LaunchDownload.downloadJarFiles(Unknown Source)
at com.sun.javaws.LaunchDownload.downloadEagerorAll(Unknown Source)
at com.sun.javaws.Launcher.downloadResources(Unknown Source)
at com.sun.javaws.Launcher.prepareLaunchFile(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$1.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
When i tried downloading application from another pc everything is OK.
I reinstalled JRE, rebuild and restart server - no result.
Any ideas?
Thanks in advance!