背景说明:
使用程序修改电脑的相关的注册表信息(修改功能已经测试，没有问题),修改完成后程序将与用户交互(showConfirmDialog)，提示是否立即重启,然后根据用户的选择作具体的操作，点击否，程序提示"注册表修改将在下次重启后生效"。

执行完上述操作之后，程序抛出异常，我尝试屏蔽这段弹出对话框与用户交互的代码（因异常信息中没有一条信息是指向我的程序代码，所以小弟有点束手无措），程序运行正常，加入则抛异常。异常代码如下，求解! 谢谢!

另外借此也想让大家分享一下针对这种异常信息中没有任何信息指向自己的代码的这种异常处理方法!

Exception in thread "AWT-EventQueue-0" java.lang.ClassCastException

	at javax.swing.LayoutComparator.compare(LayoutComparator.java:61)

	at java.util.Arrays.mergeSort(Arrays.java:1270)

	at java.util.Arrays.mergeSort(Arrays.java:1281)

	at java.util.Arrays.mergeSort(Arrays.java:1282)

	at java.util.Arrays.mergeSort(Arrays.java:1281)

	at java.util.Arrays.mergeSort(Arrays.java:1282)

	at java.util.Arrays.mergeSort(Arrays.java:1282)

	at java.util.Arrays.sort(Arrays.java:1210)

	at java.util.Collections.sort(Collections.java:159)

	at javax.swing.SortingFocusTraversalPolicy.enumerateAndSortCycle(SortingFocusTraversalPolicy.java:119)

	at javax.swing.SortingFocusTraversalPolicy.getFirstComponent(SortingFocusTraversalPolicy.java:434)

	at javax.swing.LayoutFocusTraversalPolicy.getFirstComponent(LayoutFocusTraversalPolicy.java:148)

	at javax.swing.SortingFocusTraversalPolicy.getDefaultComponent(SortingFocusTraversalPolicy.java:511)

	at javax.swing.LegacyGlueFocusTraversalPolicy.getDefaultComponent(LegacyGlueFocusTraversalPolicy.java:131)

	at java.awt.FocusTraversalPolicy.getInitialComponent(FocusTraversalPolicy.java:152)

	at java.awt.Window.getMostRecentFocusOwner(Window.java:2131)

	at java.awt.DefaultKeyboardFocusManager.dispatchEvent(DefaultKeyboardFocusManager.java:629)

	at java.awt.Component.dispatchEventImpl(Component.java:4524)

	at java.awt.Container.dispatchEventImpl(Container.java:2099)

	at java.awt.Window.dispatchEventImpl(Window.java:2478)

	at java.awt.Component.dispatchEvent(Component.java:4482)

	at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:644)

	at java.awt.EventQueue.access$000(EventQueue.java:85)

	at java.awt.EventQueue$1.run(EventQueue.java:603)

	at java.awt.EventQueue$1.run(EventQueue.java:601)

	at java.security.AccessController.doPrivileged(Native Method)

	at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:87)

	at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:98)

	at java.awt.EventQueue$2.run(EventQueue.java:617)

	at java.awt.EventQueue$2.run(EventQueue.java:615)

	at java.security.AccessController.doPrivileged(Native Method)

	at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:87)

	at java.awt.EventQueue.dispatchEvent(EventQueue.java:614)

	at java.awt.SequencedEvent.dispatch(SequencedEvent.java:101)

	at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:642)

	at java.awt.EventQueue.access$000(EventQueue.java:85)

	at java.awt.EventQueue$1.run(EventQueue.java:603)

	at java.awt.EventQueue$1.run(EventQueue.java:601)

	at java.security.AccessController.doPrivileged(Native Method)

	at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:87)

	at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:98)

	at java.awt.EventQueue$2.run(EventQueue.java:617)

	at java.awt.EventQueue$2.run(EventQueue.java:615)

	at java.security.AccessController.doPrivileged(Native Method)

	at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:87)

	at java.awt.EventQueue.dispatchEvent(EventQueue.java:614)

	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)