java.lang.NullPointerException: This exception has no message.

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via Coderanch by sharath kv, 1 year ago
This exception has no message.
java.lang.NullPointerException:
at undefined.PaneDemo4.populate_cards(PaneDemo4.java:356)
at undefined.get_cards_details.Employee(get_cards_details.java:72)
at undefined.get_cards_details.(get_cards_details.java:12)
at javax.swing.JComboBox.fireActionEvent(JComboBox.java:870)
at javax.swing.JComboBox.setSelectedItem(JComboBox.java:417)

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