I am having an issue with writing a Serializable object to a file. I have been able to narrow the problem down, but have no idea what would cause this, so I'm just looking for advice anyone may have, because I can't really give an example, but I will give some shell code to paint the picture.
Basically I have an object storing information about the program that I save by writing the object to file. It has a DefaultComboBoxModel which is part of what is causing my issue. For example:
public class ProgramInfo implements Serializable {
private DefaultComboBoxModel model = new DefaultComboBoxModel();
// A bunch of other stuff
public DefaultComboBoxModel getModel() {
return model;
}
public void setModel(DefaultComboBoxModel m) {
model = m;
}
}
Then, I have a class which extends JPanel and looks like this:
public class SomePanel extends JPanel {
private SomeOtherClass someOtherClass = new SomeOtherClass();
private ProgramInfo programInfo;
// A bunch of other stuff
public SomePanel(ProgramInfo info) {
programInfo = info;
initGUI();
}
private void initGUI() {
JComboBox box = new JComboBox(programInfo.getModel());
}
}
The issue occurs after I add an element to DefaultComboBoxModel by calling model.addElement(). However, the issue does not occur if I only have one instance of SomePanel in my program, but if I create a second instance of SomePanel, it throws a java.io.NotSerializableException on the object SomeOtherClass when trying to write ProgramInfo to file. If I comment out SomeOtherClass, then the next object in the SomePanel class throws the same error when trying to write ProgramInfo to file.
As a note, I am not an expert programmer, it is just a hobby and I am completely self taught. Any advice/reading material on why this could happen would be great. Thanks in advance!
