What isSelectionEmpty()'s function in Sun's Tutorial?

Question

I was searching for the function of isSelectionEmpty and the api said
it is true when no indices are selected. But then what is the reason for this
method to be executed at the Sun Tutorial's code below:
Can anyone kindly elaborate on this method's use here I mean what's the condition when no indices will be selected?
webAddress:
http://java.sun.com/docs/books/tutorial/uiswing/components/table.html
rowSM.addListSelectionListener(new ListSelectionListener() {
    public void valueChanged(ListSelectionEvent e) {
        //Ignore extra messages.
        if (e.getValueIsAdjusting()) return;
        ListSelectionModel lsm =
            (ListSelectionModel)e.getSource();
        if (lsm.isSelectionEmpty()) {
            ...//no rows are selected
        } else {
            int selectedRow = lsm.getMinSelectionIndex();
            ...//selectedRow is selected
});I searched the web and the forum couldn't find the answer for my question. So any help will be appreciated.

Answer 1

Let's say you have a row selected. On a JTable (as on a JList), you can deselect that particular row without having to select another one. You do that by control+click (for the Windows platform) on that particular row. The result is a change in the list selection model with a resulting empty selection, hence the corresponding ListSelectionEvent being fired.
Does that answer your question?