title: Error when changing the look and feel(UIManager) of the swing application
body: <p>Hello I have an interface which user can change the look and feel . Here is the interface:</p>
  
  <p><a href="http://www.hostingpics.net/viewer.php?id=579250themesApp.jpg" rel="nofollow">http://www.hostingpics.net/viewer.php?id=579250themesApp.jpg</a></p>
  
  <p>and the code of each button:</p>
  
  <pre><code>//The JDesktop Frame contains all the Internal Frames
  JDesktop p = new JDesktop();
  try {
              UIManager.setLookAndFeel( new javax.swing.plaf.metal.MetalLookAndFeel());
  
          SwingUtilities.updateComponentTreeUI(p);
          } catch (UnsupportedLookAndFeelException ex) {
              Logger.getLogger(paramApparence.class.getName()).log(Level.SEVERE, null, ex);
          }
  </code></pre>
  
  <p>For each button I change only the look and feel(Metal/Nimbus,etc)</p>
  
  <p>When I click on the button to change the look and feel it gives me:</p>
  
  <pre><code>Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException
  </code></pre>
  
  <p>Here is the complete stack trace:</p>
  
  <pre><code>Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException
      at sun.font.FontDesignMetrics$MetricsKey.init(FontDesignMetrics.java:217)
      at sun.font.FontDesignMetrics.getMetrics(FontDesignMetrics.java:286)
      at sun.swing.SwingUtilities2.getFontMetrics(SwingUtilities2.java:1012)
      at javax.swing.JComponent.getFontMetrics(JComponent.java:1624)
      at sun.swing.MenuItemLayoutHelper.reset(MenuItemLayoutHelper.java:125)
      at javax.swing.plaf.synth.SynthMenuItemLayoutHelper.&lt;init&gt;(SynthMenuItemLayoutHelper.java:119)
      at javax.swing.plaf.synth.SynthGraphicsUtils.paint(SynthGraphicsUtils.java:498)
      at javax.swing.plaf.synth.SynthMenuUI.paint(SynthMenuUI.java:283)
      at javax.swing.plaf.synth.SynthMenuUI.update(SynthMenuUI.java:248)
      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.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.paint(JComponent.java:1063)
      at javax.swing.JComponent.paintToOffscreen(JComponent.java:5221)
      at javax.swing.BufferStrategyPaintManager.paint(BufferStrategyPaintManager.java:295)
      at javax.swing.RepaintManager.paint(RepaintManager.java:1206)
      at javax.swing.JComponent._paintImmediately(JComponent.java:5169)
      at javax.swing.JComponent.paintImmediately(JComponent.java:4980)
      at javax.swing.RepaintManager.paintDirtyRegions(RepaintManager.java:770)
      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:705)
      at java.awt.EventQueue.access$000(EventQueue.java:101)
      at java.awt.EventQueue$3.run(EventQueue.java:666)
      at java.awt.EventQueue$3.run(EventQueue.java:664)
      at java.security.AccessController.doPrivileged(Native Method)
      at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
      at java.awt.EventQueue.dispatchEvent(EventQueue.java:675)
      at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:211)
      at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:128)
      at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:117)
      at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:113)
      at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:105)
      at java.awt.EventDispatchThread.run(EventDispatchThread.java:90)
  Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException
      at sun.font.FontDesignMetrics$MetricsKey.init(FontDesignMetrics.java:217)
      at sun.font.FontDesignMetrics.getMetrics(FontDesignMetrics.java:286)
      at sun.swing.SwingUtilities2.getFontMetrics(SwingUtilities2.java:1012)
      at javax.swing.JComponent.getFontMetrics(JComponent.java:1624)
      at sun.swing.MenuItemLayoutHelper.reset(MenuItemLayoutHelper.java:126)
      at javax.swing.plaf.synth.SynthMenuItemLayoutHelper.&lt;init&gt;(SynthMenuItemLayoutHelper.java:119)
      at javax.swing.plaf.synth.SynthGraphicsUtils.paint(SynthGraphicsUtils.java:498)
      at javax.swing.plaf.synth.SynthMenuItemUI.paint(SynthMenuItemUI.java:283)
      at javax.swing.plaf.synth.SynthMenuItemUI.update(SynthMenuItemUI.java:247)
      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.JComponent.paintToOffscreen(JComponent.java:5221)
      at javax.swing.BufferStrategyPaintManager.paint(BufferStrategyPaintManager.java:295)
      at javax.swing.RepaintManager.paint(RepaintManager.java:1206)
      at javax.swing.JComponent._paintImmediately(JComponent.java:5169)
      at javax.swing.JComponent.paintImmediately(JComponent.java:4980)
      at javax.swing.RepaintManager.paintDirtyRegions(RepaintManager.java:770)
      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:705)
      at java.awt.EventQueue.access$000(EventQueue.java:101)
      at java.awt.EventQueue$3.run(EventQueue.java:666)
      at java.awt.EventQueue$3.run(EventQueue.java:664)
      at java.security.AccessController.doPrivileged(Native Method)
      at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
      at java.awt.EventQueue.dispatchEvent(EventQueue.java:675)
      at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:211)
      at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:128)
      at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:117)
      at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:113)
      at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:105)
      at java.awt.EventDispatchThread.run(EventDispatchThread.java:90)
  Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException
      at sun.font.FontDesignMetrics$MetricsKey.init(FontDesignMetrics.java:217)
      at sun.font.FontDesignMetrics.getMetrics(FontDesignMetrics.java:286)
      at sun.swing.SwingUtilities2.getFontMetrics(SwingUtilities2.java:1012)
      at javax.swing.JComponent.getFontMetrics(JComponent.java:1624)
      at sun.swing.MenuItemLayoutHelper.reset(MenuItemLayoutHelper.java:126)
      at javax.swing.plaf.synth.SynthMenuItemLayoutHelper.&lt;init&gt;(SynthMenuItemLayoutHelper.java:119)
      at javax.swing.plaf.synth.SynthGraphicsUtils.paint(SynthGraphicsUtils.java:498)
      at javax.swing.plaf.synth.SynthMenuItemUI.paint(SynthMenuItemUI.java:283)
      at javax.swing.plaf.synth.SynthMenuItemUI.update(SynthMenuItemUI.java:247)
      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.JComponent.paintToOffscreen(JComponent.java:5221)
      at javax.swing.BufferStrategyPaintManager.paint(BufferStrategyPaintManager.java:295)
      at javax.swing.RepaintManager.paint(RepaintManager.java:1206)
      at javax.swing.JComponent._paintImmediately(JComponent.java:5169)
      at javax.swing.JComponent.paintImmediately(JComponent.java:4980)
      at javax.swing.RepaintManager.paintDirtyRegions(RepaintManager.java:770)
      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:705)
      at java.awt.EventQueue.access$000(EventQueue.java:101)
      at java.awt.EventQueue$3.run(EventQueue.java:666)
      at java.awt.EventQueue$3.run(EventQueue.java:664)
      at java.security.AccessController.doPrivileged(Native Method)
      at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
      at java.awt.EventQueue.dispatchEvent(EventQueue.java:675)
      at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:211)
      at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:128)
      at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:117)
      at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:113)
      at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:105)
      at java.awt.EventDispatchThread.run(EventDispatchThread.java:90)
  </code></pre>