为什么NC总是会出现一些奇怪的问题呢？郁闷！！！

happysmhzp

在二次开发中点击光盘没有反应后台报错：
Exception in thread "AWT-EventQueue-0" java.lang.NoClassDefFoundError: com/sun/java/swing/SwingUtilities2
at nc.ui.pub.beans.UITabbedPaneUI.calculateTabWidth(UITabbedPaneUI.java:1813)
at nc.ui.pub.beans.UITabbedPaneUI.calculateMaxTabWidth(UITabbedPaneUI.java:1824)
at nc.ui.pub.beans.UITabbedPaneUI$TabbedPaneLayout.calculateSize(UITabbedPaneUI.java:2301)
at nc.ui.pub.beans.UITabbedPaneUI$TabbedPaneLayout.preferredLayoutSize(UITabbedPaneUI.java:2248)
at java.awt.Container.preferredSize(Container.java:1599)
at java.awt.Container.getPreferredSize(Container.java:1584)
at javax.swing.JComponent.getPreferredSize(JComponent.java:1636)
at java.awt.GridBagLayout.GetLayoutInfo(GridBagLayout.java:1092)
at java.awt.GridBagLayout.getLayoutInfo(GridBagLayout.java:893)
at java.awt.GridBagLayout.ArrangeGrid(GridBagLayout.java:2048)
at java.awt.GridBagLayout.arrangeGrid(GridBagLayout.java:2008)
at java.awt.GridBagLayout.layoutContainer(GridBagLayout.java:789)
at java.awt.Container.layout(Container.java:1421)
at java.awt.Container.doLayout(Container.java:1410)
at java.awt.Container.validateTree(Container.java:1507)
at java.awt.Container.validateTree(Container.java:1513)
at java.awt.Container.validateTree(Container.java:1513)
at java.awt.Container.validateTree(Container.java:1513)
at java.awt.Container.validateTree(Container.java:1513)
at java.awt.Container.validateTree(Container.java:1513)
at java.awt.Container.validate(Container.java:1480)
at java.awt.Window.show(Window.java:861)
at nc.ui.workshop.UAPDeveloperWorkshopUI.enterWorkshop(UAPDeveloperWorkshopUI.java:198)
at nc.ui.workshop.UAPDeveloperWorkshopUI.access$100(UAPDeveloperWorkshopUI.java:44)
at nc.ui.workshop.UAPDeveloperWorkshopUI$EnterWorkshopAction.actionPerformed(UAPDeveloperWorkshopUI.java:223)
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.AWTEventMulticaster.mouseReleased(AWTEventMulticaster.java:272)
at java.awt.AWTEventMulticaster.mouseReleased(AWTEventMulticaster.java:272)
at java.awt.Component.processMouseEvent(Component.java:6267)
at javax.swing.JComponent.processMouseEvent(JComponent.java:3267)
at java.awt.Component.processEvent(Component.java:6032)
at java.awt.Container.processEvent(Container.java:2041)
at java.awt.Component.dispatchEventImpl(Component.java:4630)
at java.awt.Container.dispatchEventImpl(Container.java:2099)
at java.awt.Component.dispatchEvent(Component.java:4460)
at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4577)
at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4238)
at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4168)
at java.awt.Container.dispatchEventImpl(Container.java:2085)
at java.awt.Component.dispatchEvent(Component.java:4460)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:599)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:269)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:174)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:169)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:161)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)
Caused by: java.lang.ClassNotFoundException: com.sun.java.swing.SwingUtilities2
at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
at java.lang.ClassLoader.loadClass(ClassLoader.java:248)
... 51 more