#4 rare unknown exception

[Sujee Maniyam]

Exception occurred during event dispatching:
java.lang.NullPointerException:
at net.sujee.javatimer.Main.setButtonState
(Main.java:162)
at
net.sujee.javatimer.TaskTableModel.setValueAt
(TaskTableModel.java:85)
at javax.swing.JTable.setValueAt(Unknown
Source)
at javax.swing.JTable.editingStopped(Unknown
Source)
at
javax.swing.DefaultCellEditor.fireEditingStopped
(Unknown Source)
at
javax.swing.DefaultCellEditor.stopCellEditing(Unknown
Source)
at javax.swing.JTable.editCellAt(Unknown
Source)
at
javax.swing.plaf.basic.BasicTableUI$MouseInputHandler.m
ousePressed(Unknown Source)
at java.awt.AWTEventMulticaster.mousePressed
(Unknown Source)
at java.awt.Component.processMouseEvent
(Unknown Source)
at java.awt.Component.processEvent(Unknown
Source)
at java.awt.Container.processEvent(Unknown
Source)
at java.awt.Component.dispatchEventImpl
(Unknown Source)
at java.awt.Container.dispatchEventImpl
(Unknown Source)
at java.awt.Component.dispatchEvent(Unknown
Source)
at
java.awt.LightweightDispatcher.retargetMouseEvent
(Unknown Source)
at
java.awt.LightweightDispatcher.processMouseEvent
(Unknown Source)
at java.awt.LightweightDispatcher.dispatchEvent
(Unknown Source)
at java.awt.Container.dispatchEventImpl
(Unknown Source)
at java.awt.Window.dispatchEventImpl(Unknown
Source)
at java.awt.Component.dispatchEvent(Unknown
Source)
at java.awt.EventQueue.dispatchEvent(Unknown
Source)
at
java.awt.EventDispatchThread.pumpOneEventForComponent
(Unknown Source)
at
java.awt.EventDispatchThread.pumpEventsForComponent
(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents
(Unknown Source)
at java.awt.EventDispatchThread.run(Unknown
Source)