我从SVN在Eclipse中有一个新的Java项目,只是试图在Eclipse的Project Explorer窗口中打开项目,并收到这个错误：

Problems occurred when invoking code from plug-in: "org.eclipse.jface".

我该怎么解决这个问题？

异常堆栈跟踪：

java.lang.NullPointerException

at org.jboss.ide.eclipse.as.classpath.core.ejb3.EJB3ClasspathContainer.getClasspathEntries(EJB3ClasspathContainer.java:115)

at org.eclipse.jdt.internal.core.JavaProject.resolveClasspath(JavaProject.java:2695)

at org.eclipse.jdt.internal.core.JavaProject.resolveClasspath(JavaProject.java:2853)

at org.eclipse.jdt.internal.core.JavaProject.getResolvedClasspath(JavaProject.java:1958)

at org.eclipse.jdt.internal.core.PackageFragmentRoot.getRawClasspathEntry(PackageFragmentRoot.java:547)

at org.eclipse.jdt.internal.corext.buildpath.ClasspathModifier.isExcluded(ClasspathModifier.java:485)

at org.eclipse.jdt.internal.ui.wizards.buildpaths.newsourcepage.IncludeToBuildpathAction.canHandle(IncludeToBuildpathAction.java:170)

at org.eclipse.jdt.internal.ui.wizards.buildpaths.newsourcepage.BuildpathModifierAction.selectionChanged(BuildpathModifierAction.java:101)

at org.eclipse.jface.viewers.Viewer$2.run(Viewer.java:164)

at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)

at org.eclipse.ui.internal.JFaceUtil$1.run(JFaceUtil.java:49)

at org.eclipse.jface.util.SafeRunnable.run(SafeRunnable.java:175)

at org.eclipse.jface.viewers.Viewer.fireSelectionChanged(Viewer.java:162)

at org.eclipse.jface.viewers.StructuredViewer.updateSelection(StructuredViewer.java:2188)

at org.eclipse.jface.viewers.StructuredViewer.handleSelect(StructuredViewer.java:1211)

at org.eclipse.ui.navigator.CommonViewer.handleSelect(CommonViewer.java:478)

at org.eclipse.jface.viewers.StructuredViewer$4.widgetSelected(StructuredViewer.java:1241)

at org.eclipse.jface.util.OpenStrategy.fireSelectionEvent(OpenStrategy.java:239)

at org.eclipse.jface.util.OpenStrategy.access$4(OpenStrategy.java:233)

at org.eclipse.jface.util.OpenStrategy$1.handleEvent(OpenStrategy.java:403)

at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)

at org.eclipse.swt.widgets.Display.sendEvent(Display.java:4128)

at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1457)

at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1480)

at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1465)

at org.eclipse.swt.widgets.Widget.notifyListeners(Widget.java:1270)

at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:3974)

at org.eclipse.swt.widgets.Display.applicationNextEventMatchingMask(Display.java:4875)

at org.eclipse.swt.widgets.Display.applicationProc(Display.java:5226)

at org.eclipse.swt.internal.cocoa.OS.objc_msgSendSuper(Native Method)

at org.eclipse.swt.widgets.Widget.callSuper(Widget.java:220)

at org.eclipse.swt.widgets.Widget.mouseDownSuper(Widget.java:1092)

at org.eclipse.swt.widgets.Tree.mouseDownSuper(Tree.java:2052)

at org.eclipse.swt.widgets.Widget.mouseDown(Widget.java:1084)

at org.eclipse.swt.widgets.Control.mouseDown(Control.java:2528)

at org.eclipse.swt.widgets.Tree.mouseDown(Tree.java:2007)

at org.eclipse.swt.widgets.Display.windowProc(Display.java:5471)

at org.eclipse.swt.internal.cocoa.OS.objc_msgSendSuper(Native Method)

at org.eclipse.swt.widgets.Widget.callSuper(Widget.java:220)

at org.eclipse.swt.widgets.Widget.windowSendEvent(Widget.java:2095)

at org.eclipse.swt.widgets.Shell.windowSendEvent(Shell.java:2253)

at org.eclipse.swt.widgets.Display.windowProc(Display.java:5535)

at org.eclipse.swt.internal.cocoa.OS.objc_msgSendSuper(Native Method)

at org.eclipse.swt.widgets.Display.applicationSendEvent(Display.java:4989)

at org.eclipse.swt.widgets.Display.applicationProc(Display.java:5138)

at org.eclipse.swt.internal.cocoa.OS.objc_msgSend(Native Method)

at org.eclipse.swt.internal.cocoa.NSApplication.sendEvent(NSApplication.java:128)

at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3610)

at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:2701)

at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2665)

at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:2499)

at org.eclipse.ui.internal.Workbench$7.run(Workbench.java:679)

at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)

at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:668)

at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149)

at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:123)

at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:196)

at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:110)

at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:79)

at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:344)

at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:179)

at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)

at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)

at java.lang.reflect.Method.invoke(Method.java:597)

at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:622)

at org.eclipse.equinox.launcher.Main.basicRun(Main.java:577)

at org.eclipse.equinox.launcher.Main.run(Main.java:1410)

会话数据：

eclipse.buildId=M20120208-0800

java.version=1.6.0_37

java.vendor=Apple Inc.

BootLoader constants: OS=macosx, ARCH=x86_64, WS=cocoa, NL=en_US

Framework arguments: -product org.eclipse.epp.package.jee.product -keyring /Users/saraiva/.eclipse_keyring -showlocation

Command-line arguments: -os macosx -ws cocoa -arch x86_64 -product org.eclipse.epp.package.jee.product -keyring /Users/saraiva/.eclipse_keyring -showlocation