java.lang.reflect.InvocationTargetException求大神帮忙

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[code=java]

[/code]java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at gbu.ui.foundation.base.BaseBillUI.onButtonClicked(BaseBillUI.java:1024)
at gbu.ui.foundation.base.BaseMasterDetailUI.onButtonClicked(BaseMasterDetailUI.java:625)
at gbu.ui.foundation.frame.UIToftPanel.handleButtonEvent(UIToftPanel.java:134)
at gbu.ui.foundation.frame.FramePanel.dispatchButtonEvent(FramePanel.java:125)
at gbu.ui.foundation.frame.FramePanel.access$100(FramePanel.java:28)
at gbu.ui.foundation.frame.FramePanel$ButtonHandler.buttonClicked(FramePanel.java:54)
at gbu.ui.foundation.frame.ButtonBar.firePostEvent(ButtonBar.java:398)
at gbu.ui.foundation.frame.ButtonBar$1.run(ButtonBar.java:251)
at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:209)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:672)
at java.awt.EventQueue.access$400(EventQueue.java:81)
at java.awt.EventQueue$2.run(EventQueue.java:633)
at java.awt.EventQueue$2.run(EventQueue.java:631)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:87)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:642)
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.NullPointerException
at gbu.ui.foundation.base.BaseMasterDetailUI.onEdit(BaseMasterDetailUI.java:1135)
... 26 more

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