java.lang.NullPointerException: This exception has no message.
Searched on Google with the first line of a JAVA stack trace?
We can recommend more relevant solutions and speed up debugging when you paste your entire stack trace with the exception message. Try a sample exception.
Recommended solutions based on your search
Solutions on the web
via Oracle Community by 807595, 1 year ago
java.lang.NullPointerException:
at QuestionEditor$1.itemStateChanged(QuestionEditor.java:240)
at javax.swing.JComboBox.fireItemStateChanged(JComboBox.java:1162)
at javax.swing.JComboBox.selectedItemChanged(JComboBox.java:1219)
at javax.swing.JComboBox.contentsChanged(JComboBox.java:1266)
at javax.swing.AbstractListModel.fireContentsChanged(AbstractListModel.java:100)
at javax.swing.DefaultComboBoxModel.setSelectedItem(DefaultComboBoxModel.java:88)
at javax.swing.DefaultComboBoxModel.addElement(DefaultComboBoxModel.java:126)
at javax.swing.JComboBox.addItem(JComboBox.java:690)
at QuestionEditor.getJComboBox(QuestionEditor.java:247)
at QuestionEditor.getJContentPane(QuestionEditor.java:132)
at QuestionEditor.initialize(QuestionEditor.java:114)
at QuestionEditor.
(QuestionEditor.java:51) at Alypaa.
(Alypaa.java:18) at Alypaa.main(Alypaa.java:25)