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)