Unable to install theme due to stacktrace

Question

I set my appearance by doing this

private void setSubstanceSkin(String theme) { try { UIManager.setLookAndFeel(new SubstanceBusinessBlackSteelLookAndFeel()); JFrame.setDefaultLookAndFeelDecorated(true); JDialog.setDefaultLookAndFeelDecorated(true); } catch (Exception e) { e.printStackTrace(); } } 

But I get this stack:

 Exception in thread "AWT-EventQueue-0" java.lang.ClassCastException: javax.swing.plaf.metal.MetalRootPaneUI cannot be cast to org.jvnet.substance.SubstanceRootPaneUI at org.jvnet.substance.utils.SubstanceCoreUtilities.getTitlePane(SubstanceCoreUtilities.java:3590) at org.jvnet.substance.title.ImageWrapperHeaderPainter.paintExtraBackground(ImageWrapperHeaderPainter.java:172) at org.jvnet.substance.SubstanceFillBackgroundDelegate.update(SubstanceFillBackgroundDelegate.java:198) at org.jvnet.substance.SubstanceMenuBarUI.__org__jvnet__substance__SubstanceMenuBarUI__container__update(SubstanceMenuBarUI.java:251) at org.jvnet.substance.SubstanceMenuBarUI.update(SubstanceMenuBarUI.java) at javax.swing.JComponent.paintComponent(JComponent.java:778) at javax.swing.JComponent.paint(JComponent.java:1054) at javax.swing.JComponent.paintChildren(JComponent.java:887) at javax.swing.JComponent.paint(JComponent.java:1063) at javax.swing.JLayeredPane.paint(JLayeredPane.java:585) at javax.swing.JComponent.paintChildren(JComponent.java:887) at javax.swing.JComponent.paintToOffscreen(JComponent.java:5228) at javax.swing.RepaintManager$PaintManager.paintDoubleBuffered(RepaintManager.java:1482) at javax.swing.RepaintManager$PaintManager.paint(RepaintManager.java:1413) at javax.swing.RepaintManager.paint(RepaintManager.java:1206) at javax.swing.JComponent.paint(JComponent.java:1040) at java.awt.GraphicsCallback$PaintCallback.run(GraphicsCallback.java:39) at sun.awt.SunGraphicsCallback.runOneComponent(SunGraphicsCallback.java:78) at sun.awt.SunGraphicsCallback.runComponents(SunGraphicsCallback.java:115) at java.awt.Container.paint(Container.java:1967) at java.awt.Window.paint(Window.java:3877) at javax.swing.RepaintManager.paintDirtyRegions(RepaintManager.java:781) at javax.swing.RepaintManager.paintDirtyRegions(RepaintManager.java:728) at javax.swing.RepaintManager.prePaintDirtyRegions(RepaintManager.java:677) at javax.swing.RepaintManager.access$700(RepaintManager.java:59) at javax.swing.RepaintManager$ProcessingRunnable.run(RepaintManager.java:1621) at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:251) at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:721) at java.awt.EventQueue.access$200(EventQueue.java:103) at java.awt.EventQueue$3.run(EventQueue.java:682) at java.awt.EventQueue$3.run(EventQueue.java:680) at java.security.AccessController.doPrivileged(Native Method) at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76) at java.awt.EventQueue.dispatchEvent(EventQueue.java:691) at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:242) at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:161) at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:150) at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:146) at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:138) at java.awt.EventDispatchThread.run(EventDispatchThread.java:91) 

Answer 1

The substance's gaze and feeling must be included in the Dispatch Thread event, inside invokeLater (), more to see in the API

 SwingUtilities.invokeLater(new Runnable() { @Override public void run() { try { UIManager.setLookAndFeel( new SubstanceBusinessBlackSteelLookAndFeel()); } catch (UnsupportedLookAndFeelException e) { throw new RuntimeException(e); } } }); 

runtime should be called SwingUtilities.updateComponentTreeUI (frame); then the jframe should be like a local variable

 SwingUtilities.invokeLater(new Runnable() { @Override public void run() { try { UIManager.setLookAndFeel( new SubstanceBusinessBlackSteelLookAndFeel()); SwingUtilities.updateComponentTreeUI(frame); } catch (UnsupportedLookAndFeelException e) { throw new RuntimeException(e); } } });