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via Coderanch by Tarfa man, 1 year ago
This exception has no message.
via Stack Overflow by Maria Elena Boschi
, 2 years ago
java.lang.NullPointerException: 	at javax.swing.AbstractButton.isSelected(AbstractButton.java:308)	at javax.swing.ButtonGroup.add(ButtonGroup.java:76)	at lightofproject.gui.DiagnoseSystemV_1.initComponents(DiagnoseSystemV_1.java:109)	at lightofproject.gui.DiagnoseSystemV_1.(DiagnoseSystemV_1.java:31)	at lightofproject.gui.DiagnoseSystemV_1$2.run(DiagnoseSystemV_1.java:695)	at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:209)	at java.awt.EventQueue.dispatchEvent(EventQueue.java:597)	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)