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How can I fix connection window of SQLDeveloper?

77a569ed-9cd9-4800-bbba-76fe9ab77c2bFeb 1 2020 — edited Feb 1 2020

When I run SQLDeveloper, I can't find connection Information window,

I don't know why It didn't working.

I deleted and re-installed SQLDeveloper, But Problem is not solved yet.

And I found nullpointerexception of sqldeveloper during running.

How can I fix it?

<NullPointerException>

Failed to load a window

java.lang.NullPointerException

        at oracle.dbtools.raptor.navigator.db.impl.ConnectionStoresTreeNode.getConnectionType(ConnectionStoresTreeNode.java:215)

        at oracle.dbtools.raptor.navigator.db.impl.ConnectionStoresTreeNode.loadChildrenImpl(ConnectionStoresTreeNode.java:191)

        at oracle.dbtools.raptor.navigator.model.NavigatorTree.loadChildrenSynchronously(NavigatorTree.java:428)

        at oracle.dbtools.raptor.navigator.model.NavigatorTree.loadChildren(NavigatorTree.java:607)

        at oracle.dbtools.raptor.navigator.model.NavigatorTree.open(NavigatorTree.java:365)

        at oracle.dbtools.raptor.navigator.model.NavigatorTree.expand(NavigatorTree.java:764)

        at oracle.dbtools.raptor.navigator.core.NavigatorWindow.expandVisibleRoot(NavigatorWindow.java:354)

        at oracle.dbtools.raptor.navigator.core.NavigatorWindow.createGUI(NavigatorWindow.java:122)

        at oracle.dbtools.raptor.navigator.core.NavigatorWindow.getGUI(NavigatorWindow.java:319)

        at oracle.ide.docking.DockableWindow.getHostedComponent(DockableWindow.java:238)

        at com.oracle.jdeveloper.nbwindowsystem.NbDockableContainer.componentOpened(NbDockableContainer.java:171)

        at org.openide.windows.WindowManager.componentOpenNotify(WindowManager.java:307)

        at org.netbeans.core.windows.WindowManagerImpl.notifyTopComponentOpened(WindowManagerImpl.java:1149)

        at org.netbeans.core.windows.Central.addModeOpenedTopComponent(Central.java:798)

        at org.netbeans.core.windows.ModeImpl.addOpenedTopComponent(ModeImpl.java:354)

        at org.netbeans.core.windows.LazyLoader.lazyLoad(LazyLoader.java:140)

        at org.netbeans.core.windows.PersistenceHandler.initModeFromConfig(PersistenceHandler.java:441)

        at org.netbeans.core.windows.PersistenceHandler.load(PersistenceHandler.java:204)

        at org.netbeans.core.windows.WindowSystemImpl.load(WindowSystemImpl.java:81)

        at org.netbeans.core.GuiRunLevel$InitWinSys.run(GuiRunLevel.java:229)

        at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:311)

        at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:756)

        at java.awt.EventQueue.access$500(EventQueue.java:97)

        at java.awt.EventQueue$3.run(EventQueue.java:709)

        at java.awt.EventQueue$3.run(EventQueue.java:703)

        at java.security.AccessController.doPrivileged(Native Method)

        at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:80)

        at java.awt.EventQueue.dispatchEvent(EventQueue.java:726)

        at oracle.javatools.internal.ui.EventQueueWrapper._dispatchEvent(EventQueueWrapper.java:169)

        at oracle.javatools.internal.ui.EventQueueWrapper.dispatchEvent(EventQueueWrapper.java:151)

        at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:201)

        at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)

        at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105)

        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)

        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)

        at java.awt.EventDispatchThread.run(EventDispatchThread.java:82)

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Added on Feb 1 2020
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