SelectionListener selectionListener = new SelectionListener(myTable);
        myTable.getSelectionModel().addListSelectionListener(selectionListener);
        myTable.getColumnModel().getSelectionModel().addListSelectionListener(selectionListener);
        myTable.setSelectionMode(javax.swing.ListSelectionModel.SINGLE_SELECTION);
...
    class SelectionListener implements ListSelectionListener {
        JTable table;
        SelectionListener(JTable table) {
            this.table = table;
        }
        public void valueChanged(ListSelectionEvent e) {
            if (e.getSource() == table.getSelectionModel() && table.getRowSelectionAllowed()){
            ...
            } else if (e.getSource() == table.getColumnModel().getSelectionModel() && table.getColumnSelectionAllowed() ){
            ...
            }
        }
    }