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I was working on a UML project (can't remember exactly what I was doing) when I got the following NPE: java.lang.NullPointerException at org.netbeans.spi.project.support.ant.EditableProperties.put(EditableProperties.java:218) at org.netbeans.spi.project.support.ant.EditableProperties.setProperty(EditableProperties.java:252) at org.netbeans.modules.uml.project.ui.customizer.UMLProjectProperties.storeProperties(UMLProjectProperties.java:260) at org.netbeans.modules.uml.project.ui.customizer.UMLProjectProperties.access$000 (UMLProjectProperties.java:59) at org.netbeans.modules.uml.project.ui.customizer.UMLProjectProperties$1.run(UMLProjectProperties.java:188) at org.openide.util.Mutex.writeAccess(Mutex.java:356) at org.netbeans.modules.uml.project.ui.customizer.UMLProjectProperties.save(UMLProjectProperties.java:184) at org.netbeans.modules.uml.project.ui.customizer.CustomizerProviderImpl$OptionListener.actionPerformed(CustomizerProviderImpl.java:221) at org.netbeans.modules.uml.project.ui.customizer.uiapi.UMLCustomizerDialog$OptionListener.actionPerformed(UMLCustomizerDialog.java:124) at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1995) at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2318) at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:387) at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:242) at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:236) at java.awt.Component.processMouseEvent(Component.java:6038) at javax.swing.JComponent.processMouseEvent(JComponent.java:3265) at java.awt.Component.processEvent(Component.java:5803) at java.awt.Container.processEvent(Container.java:2058) at java.awt.Component.dispatchEventImpl(Component.java:4410) at java.awt.Container.dispatchEventImpl(Container.java:2116) at java.awt.Component.dispatchEvent(Component.java:4240) at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4322) at java.awt.LightweightDispatcher.processMouseEvent(Container.java:3986) at java.awt.LightweightDispatcher.dispatchEvent(Container.java:3916) at java.awt.Container.dispatchEventImpl(Container.java:2102) at java.awt.Window.dispatchEventImpl(Window.java:2429) at java.awt.Component.dispatchEvent(Component.java:4240) [catch] at java.awt.EventQueue.dispatchEvent(EventQueue.java:599) at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:273) at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:183) at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:173) at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:168) at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:160) at java.awt.EventDispatchThread.run(EventDispatchThread.java:121)
can you reproduce this NPE ? please try to investigate steps which causes this exception and provide more information. it will help us to fix it ... reassigned to uml for evaluation
> can you reproduce this NPE ? No, I really don't remember the exact steps I took before this Exception was thrown. > please try to investigate steps which causes this exception and provide more information. I can try but I can not guarantee that I really manage to reproduce the problem. Is there a way to run NetBeans in some kind of debug mode so that the log file or console output shows the last steps taken before an Exception is thrown?
Not reproducible.
verified in 6.5 build