Question

I have a JList and JTextArea pair. Based on the selected item on JList, Data will be displayed in JTextArea. But for some data, user inputs are needed, and are collected by a JOptionPane. The problem is when I traverse JList with up and down arrows; having JOptionPane popped up; both successive items are selected. I mean previously selected data is not getting unselected, but only the last data is supposed to be selected. I am popping JOptionPane inside changeTextArea() method and the Code is as follows. Thanks for any help!

private class JListListenerEdit implements ListSelectionListener {
    public void valueChanged(ListSelectionEvent event) {
        if (!event.getValueIsAdjusting() && listEdit.isFocusOwner()) {
            Data selection = null;
            try {
                selection = listEdit.getSelectedValue();
            } catch (Exception e) {
            }
            if (null != selection) {
                changeTextArea(selection);
            }
        }
    }
}

public void changeTextAreaEditData(SData selection) {
        if (selection.requireInputs()) {
            JOptionPane.showMessageDialog(frame,"Provide inputs to process the data.","Inputs Required", JOptionPane.INFORMATION);
            this.textAreaEditData.setText(processData(selection.getData()));
        } else {
            this.textAreaEditData.setText(selection.getData());
        }
}

Answer 1

I see that you are checking getValueIsAdjusting() in your ListSelectionListener, as shown here. You might try wrapping the call to changeTextArea() inside an Runnable using invokeLater().