CODEWITHSUNDEEP
javaswingjcomboboxitemlistener
user2101411
user2101411

Reputation: 1202

Getting values from JComboBox upon selection and deselection

I am trying to display a selected item from a JComboBox (which I do get to display) but when I pass a ItemListener to see if it was deselected, the other label still shows up and it just overlaps the next label. Here is my code:

ItemListener itemListener = new ItemListener() {
    @Override
    public void itemStateChanged(ItemEvent event) {
        int state = event.getStateChange();

        JPanel select = new JPanel();

        JLabel label = new JLabel("Department Selected: ");

        JTextField selected = new JTextField(10);

        switch (state) {
            case ItemEvent.SELECTED:
                String selection = (String) aDpts.getSelectedItem();
                selected.setEditable(false);
                selected.setText(selection);

                select.add(label);
                select.add(selected);

            break;

            case ItemEvent.DESELECTED:
                label.removeAll();
                selected.removeAll();
                select.removeAll();
            break;
        }

        add(select, BorderLayout.LINE_END);
    }

Also, it won't show the label unless I resize the window..

Upvotes: 0

Views: 118

Answers (1)

MadProgrammer
MadProgrammer

Reputation: 347184

You're creating a new instance of JLabel EVERY time itemStateChanged is changed, so you're attempting to remove a label from a container to which it was never added.

Instead, simply create a single JLabel and update it's text property

I'm scratching my head over why you would create a new instance of JLabel, JPanel and JTextField when it seems like you are simply trying to update the previous states

Upvotes: 1

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