private void jList1ValueChanged(javax.swing.event.ListSelectionEvent evt) {//GEN-FIRST:event_jList1ValueChanged
        try {
            if (jList1.getSelectedValue().equals("Artist")) {
                sort.byArtist();
                DefaultListModel model = new DefaultListModel();
                for(int i = 0; i < listD.size(); i++){
                    model.addElement(listD.getElementPosition(i, 2).toString() + " / " + listD.getElementPosition(i, 1).toString());
                }
                jList2.setModel(model);
            }
            if (jList1.getSelectedValue().equals("Album")) {
                sort.byAlbum();
                DefaultListModel model = new DefaultListModel();
                for(int i = 0; i < listD.size(); i++){
                    model.addElement(listD.getElementPosition(i, 4).toString() + " / " + listD.getElementPosition(i, 1).toString());
                }
                jList2.setModel(model);   
            }
            if (jList1.getSelectedValue().equals("Genre")) {
                sort.byGenre();
                DefaultListModel model = new DefaultListModel();
                for(int i = 0; i < listD.size(); i++){
                    model.addElement(listD.getElementPosition(i, 3).toString() + " / " + listD.getElementPosition(i, 1).toString());
                }
                jList2.setModel(model);   
            }
            if (jList1.getSelectedValue().equals("Song")) {
                sort.bySong();
                DefaultListModel model = new DefaultListModel();
                for(int i = 0; i < listD.size(); i++){
                    model.addElement(listD.getElementPosition(i, 1).toString() + " / " + listD.getElementPosition(i, 1).toString());
                }
                jList2.setModel(model);   
            }
        }
        catch (java.lang.NullPointerException e) {
            
        }
    }//GEN-LAST:event_jList1ValueChanged