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via Oracle Community by 807593, 1 year ago
This exception has no message.
java.lang.NullPointerException: 	at stockanalysis.GUI.actionPerformed(GUI.java:84)	at javax.swing.JComboBox.fireActionEvent(JComboBox.java:870)	at javax.swing.JComboBox.selectedItemChanged(JComboBox.java:894)	at javax.swing.JComboBox.contentsChanged(JComboBox.java:946)	at javax.swing.AbstractListModel.fireContentsChanged(AbstractListModel.java:79)	at javax.swing.DefaultComboBoxModel.setSelectedItem(DefaultComboBoxModel.java:86)	at javax.swing.JComboBox.setSelectedItem(JComboBox.java:415)	at javax.swing.JComboBox.setSelectedIndex(JComboBox.java:455)