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via Oracle Community by 807595, 1 year ago
This exception has no message.
java.lang.NullPointerException at QuestionEditor$1.itemStateChanged( at javax.swing.JComboBox.fireItemStateChanged( at javax.swing.JComboBox.selectedItemChanged( at javax.swing.JComboBox.contentsChanged( at javax.swing.AbstractListModel.fireContentsChanged( at javax.swing.DefaultComboBoxModel.setSelectedItem( at javax.swing.DefaultComboBoxModel.addElement( at javax.swing.JComboBox.addItem( at QuestionEditor.getJComboBox( at QuestionEditor.getJContentPane( at QuestionEditor.initialize( at QuestionEditor.<init>( at Alypaa.<init>( at Alypaa.main(