irritating NPE in BasicScrollBarUI
Hi,
Having this stack trace in stdout. Not quite sure what makes it happen. This stack trace is all I have. It does not happen consistently but sometimes, I think when I move the mouse while the screen is getting painted. I have java 5.0 running on windows with windows look & feel.
Would appreciate any tips. Thanks.
Exception in thread"AWT-EventQueue-0" java.lang.NullPointerException
at javax.swing.plaf.basic.BasicScrollBarUI.layoutVScrollbar(Unknown Source)
at javax.swing.plaf.basic.BasicScrollBarUI.layoutContainer(Unknown Source)
at java.awt.Container.layout(Unknown Source)
at java.awt.Container.doLayout(Unknown Source)
at java.awt.Container.validateTree(Unknown Source)
at java.awt.Container.validateTree(Unknown Source)
at java.awt.Container.validateTree(Unknown Source)
at java.awt.Container.validateTree(Unknown Source)
at java.awt.Container.validateTree(Unknown Source)
at java.awt.Container.validate(Unknown Source)
at javax.swing.plaf.basic.BasicTabbedPaneUI.ensureCurrentLayout(Unknown Source)
at javax.swing.plaf.basic.BasicTabbedPaneUI.getTabBounds(Unknown Source)
at javax.swing.plaf.basic.BasicTabbedPaneUI.repaintTab(Unknown Source)
at javax.swing.plaf.basic.BasicTabbedPaneUI.setFocusIndex(Unknown Source)
at javax.swing.plaf.basic.BasicTabbedPaneUI$Handler.focusGained(Unknown Source)
at java.awt.Component.processFocusEvent(Unknown Source)
at java.awt.Component.processEvent(Unknown Source)
at java.awt.Container.processEvent(Unknown Source)
at java.awt.Component.dispatchEventImpl(Unknown Source)
at java.awt.Container.dispatchEventImpl(Unknown Source)
at java.awt.Component.dispatchEvent(Unknown Source)
at java.awt.KeyboardFocusManager.redispatchEvent(Unknown Source)
at java.awt.DefaultKeyboardFocusManager.typeAheadAssertions(Unknown Source)
at java.awt.DefaultKeyboardFocusManager.dispatchEvent(Unknown Source)
at java.awt.Component.dispatchEventImpl(Unknown Source)
at java.awt.Container.dispatchEventImpl(Unknown Source)
at java.awt.Window.dispatchEventImpl(Unknown Source)
at java.awt.Component.dispatchEvent(Unknown Source)
at java.awt.EventQueue.dispatchEvent(Unknown Source)
at java.awt.SequencedEvent.dispatch(Unknown Source)
at java.awt.EventQueue.dispatchEvent(Unknown Source)
at java.awt.EventDispatchThread.pumpOneEventForHierarchy(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.run(Unknown Source)
