import java.awt.Color;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.SwingUtilities;
import javax.swing.table.DefaultTableModel;
import javax.swing.table.JTableHeader;
import javax.swing.table.TableModel;
import javax.swing.table.TableRowSorter;

public class TabelleSortieren {
    
    public TabelleSortieren() {
        init();
    }
    
    private void init() {
        String[] colNames = new String[] { "Null", "Eins", "Zwei" };
        String[][] data = { new String[] { "Katze", "Wurm", "Floh" },
                new String[] { "Helga", "Doris", "Berta" },
                new String[] { "Pizza", "Kekse", "Labskaus" } };
        DefaultTableModel model = new DefaultTableModel(data, colNames);
        JTable table = new JTable(model);
        table.setShowGrid(true);
        // default Gitterfarbe: weiß!
        table.setGridColor(Color.gray);
        JTableHeader header = table.getTableHeader();
        header.setBackground(Color.yellow);
        JPanel panel = new JPanel();
        panel.add(new JScrollPane(table));
        enableSorting(table);
        JFrame frame = new JFrame("Tabelle sortieren");
        frame.add(panel);
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.pack();
        frame.setLocationRelativeTo(null);
        frame.setVisible(true);
    }

    public void enableSorting(JTable table) {
        DefaultTableModel model = (DefaultTableModel) table.getModel();
        if (model == null)
            return;

        TableRowSorter<TableModel> sorter = new TableRowSorter<TableModel>();
            table.setRowSorter(sorter);
            sorter.setModel(model);
    }

    public static void main(String[] args) {
        SwingUtilities.invokeLater(() -> new TabelleSortieren());
    }
}