Tenho uma aplicacao swing q estou usando o substance, qndo fecho a tela no X, ele esta gerando o seguinte erro :
<blockquote>Exception in thread “AWT-EventQueue-0” java.lang.NullPointerException
at javax.swing.LookAndFeel.uninstallBorder(LookAndFeel.java:224)
at javax.swing.plaf.basic.BasicDesktopIconUI.uninstallDefaults(BasicDesktopIconUI.java:127)
at org.jvnet.substance.SubstanceDesktopIconUI.__org__jvnet__substance__SubstanceDesktopIconUI__uninstallDefaults(SubstanceDesktopIconUI.java)
at org.jvnet.substance.SubstanceDesktopIconUI.uninstallDefaults(SubstanceDesktopIconUI.java)
at javax.swing.plaf.basic.BasicDesktopIconUI.uninstallUI(BasicDesktopIconUI.java:74)
at org.jvnet.substance.SubstanceDesktopIconUI.__org__jvnet__substance__SubstanceDesktopIconUI__uninstallUI(SubstanceDesktopIconUI.java:246)
at org.jvnet.substance.SubstanceDesktopIconUI.uninstallUI(SubstanceDesktopIconUI.java)
at org.jvnet.substance.SubstanceInternalFrameUI$1.propertyChange(SubstanceInternalFrameUI.java:121)
at java.beans.PropertyChangeSupport.firePropertyChange(PropertyChangeSupport.java:339)
at java.beans.PropertyChangeSupport.firePropertyChange(PropertyChangeSupport.java:276)
at java.awt.Component.firePropertyChange(Component.java:7865)
at javax.swing.JInternalFrame.doDefaultCloseAction(JInternalFrame.java:1618)
at javax.swing.plaf.basic.BasicInternalFrameTitlePane$CloseAction.actionPerformed(BasicInternalFrameTitlePane.java:591)
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 org.jvnet.substance.utils.RolloverButtonListener.mouseReleased(RolloverButtonListener.java:109)
at java.awt.AWTEventMulticaster.mouseReleased(AWTEventMulticaster.java:272)
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)
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)
</blockquote>
Estou aprendendo ainda … se alguem puder me ajudar agradeço