Como faço para resolver java.lang.NullPointerException no eclipse

? King_Dark @ | Original: StackOverFlow
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Eu tenho um problema sobre o eclipse IDE, eu não posso abrir qualquer arquivo no meu espaço de trabalho ; se eu tentar abrir o arquivo, eclipse irá alertar o seguinte diálogo de erro

"An error has occurred. See error log for more details. java.lang.NullPointerException"

Eu vou ver ficheiro.log em .meta no espaço de trabalho e vejo um parágrafo no arquivo como este:

!ENTRY org.eclipse.jface 4 2 2557-04-09 11:40:49.422
!MESSAGE Problems occurred when invoking code from plug-in: "org.eclipse.jface".
!STACK 0
java.lang.NullPointerException
    at org.eclipse.e4.ui.internal.workbench.PartServiceImpl.internalFixContext(PartServiceImpl.java:380)
    at org.eclipse.e4.ui.internal.workbench.PartServiceImpl.bringToTop(PartServiceImpl.java:341)
    at org.eclipse.e4.ui.internal.workbench.PartServiceImpl.showPart(PartServiceImpl.java:1029)
    at org.eclipse.ui.internal.WorkbenchPage.busyOpenEditor(WorkbenchPage.java:3047)
    at org.eclipse.ui.internal.WorkbenchPage.access$22(WorkbenchPage.java:2969)
    at org.eclipse.ui.internal.WorkbenchPage$8.run(WorkbenchPage.java:2951)
    at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:70)
    at org.eclipse.ui.internal.WorkbenchPage.openEditor(WorkbenchPage.java:2947)
    at org.eclipse.ui.internal.WorkbenchPage.openEditor(WorkbenchPage.java:2911)
    at org.eclipse.ui.internal.WorkbenchPage.openEditor(WorkbenchPage.java:2902)
    at org.eclipse.ui.ide.IDE.openEditor(IDE.java:655)
    at org.eclipse.ui.ide.IDE.openEditor(IDE.java:614)
    at org.eclipse.jdt.internal.ui.javaeditor.EditorUtility.openInEditor(EditorUtility.java:360)
    at org.eclipse.jdt.internal.ui.javaeditor.EditorUtility.openInEditor(EditorUtility.java:167)
    at org.eclipse.jdt.ui.actions.OpenAction.run(OpenAction.java:249)
    at org.eclipse.jdt.ui.actions.OpenAction.run(OpenAction.java:228)
    at org.eclipse.jdt.ui.actions.SelectionDispatchAction.dispatchRun(SelectionDispatchAction.java:275)
    at org.eclipse.jdt.ui.actions.SelectionDispatchAction.run(SelectionDispatchAction.java:251)
    at org.eclipse.jdt.internal.ui.packageview.PackageExplorerActionGroup.handleOpen(PackageExplorerActionGroup.java:376)
    at org.eclipse.jdt.internal.ui.packageview.PackageExplorerPart$4.open(PackageExplorerPart.java:538)
    at org.eclipse.ui.OpenAndLinkWithEditorHelper$InternalListener.open(OpenAndLinkWithEditorHelper.java:48)
    at org.eclipse.jface.viewers.StructuredViewer$2.run(StructuredViewer.java:866)
    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.StructuredViewer.fireOpen(StructuredViewer.java:864)
    at org.eclipse.jface.viewers.StructuredViewer.handleOpen(StructuredViewer.java:1152)
    at org.eclipse.jface.viewers.StructuredViewer$6.handleOpen(StructuredViewer.java:1256)
    at org.eclipse.jface.util.OpenStrategy.fireOpenEvent(OpenStrategy.java:275)
    at org.eclipse.jface.util.OpenStrategy.access$2(OpenStrategy.java:269)
    at org.eclipse.jface.util.OpenStrategy$1.handleEvent(OpenStrategy.java:309)
    at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
    at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1053)
    at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:4169)
    at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3758)
    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$9.run(PartRenderingEngine.java:1053)
    at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:942)
    at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:86)
    at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:588)
    at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
    at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:543)
    at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149)
    at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:124)
    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:353)
    at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:180)
    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 org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:629)
    at org.eclipse.equinox.launcher.Main.basicRun(Main.java:584)
    at org.eclipse.equinox.launcher.Main.run(Main.java:1438)
    at org.eclipse.equinox.launcher.Main.main(Main.java:1414)

Como posso resolver este problema - alguma idéia?

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Top 5 Responder

1Niko @

Há um bug pediu o Eclipse :

https://bugs.eclipse.org/bugs/show_bug.cgi?id=385680

Você poderia tentar reiniciar Eclipse, que ajudou o cartaz original do problema lá.

2paragonX @

Melhor você atualizar seu eclipse, clicando nele com a ajuda >> verificar se há atualizações, você também pode começar eclipse por comando no prompt de comando digitando eclipse -impecáveis ​​. Espero que isso irá ajudá-lo .