JTable filter insensitive case

Hi o all,

in this sample I don't know how filtering this rows to include upper
and lower case records. If I use the string "micro" the JTable don't
shows the rows:

{"MSFT", "Microsoft", 26.56},
{"SUNW", "Sun Microsystems", 3.86},
{"LIMI", "Linemicro!", 67.69}

but only

{"LIMI", "Linemicro!", 67.69}

import javax.swing.*;
import javax.swing.table.*;
import java.awt.*;
import java.awt.event.*;
import java.util.regex.*;

public class FilterTable {

    public static void main(String args[]) {
        Runnable runner = new Runnable() {

            public void run() {
                JFrame frame = new JFrame("Ordenando JTable");
                frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
                Object rows[][] = {
                    {"AMZN", "Amazon", 41.28},
                    {"EBAY", "eBay", 41.57},
                    {"GOOG", "Google", 388.33},
                    {"MSFT", "Microsoft", 26.56},
                    {"NOK", "Nokia Corp", 17.13},
                    {"ORCL", "Oracle Corp.", 12.52},
                    {"SUNW", "Sun Microsystems", 3.86},
                    {"TWX", "Time Warner", 17.66},
                    {"VOD", "Vodafone Group", 26.02},
                    {"YHOO", "Yahoo!", 37.69},
                    {"LIMI", "Linemicro!", 67.69}
                };
                Object columns[] = {"Sigra", "Nome", "Preco"};
                TableModel model =
                        new DefaultTableModel(rows, columns) {

                            public Class getColumnClass(int column) {
                                Class returnValue;
                                if ((column >= 0) && (column <
getColumnCount())) {
                                    returnValue = getValueAt(0,
column).getClass();
                                } else {
                                    returnValue = Object.class;
                                }
                                return returnValue;
                            }
                        };
                JTable table = new JTable(model);
                final TableRowSorter<TableModel> sorter =
                        new TableRowSorter<TableModel>(model);
                table.setRowSorter(sorter);
                JScrollPane pane = new JScrollPane(table);
                frame.add(pane, BorderLayout.CENTER);
                JPanel panel = new JPanel(new BorderLayout());
                JLabel label = new JLabel("Filtro");
                panel.add(label, BorderLayout.WEST);
                final JTextField filterText =
                        new JTextField("micro");
                panel.add(filterText, BorderLayout.CENTER);
                frame.add(panel, BorderLayout.NORTH);
                JButton button = new JButton("Filtro");
                button.addActionListener(new ActionListener() {

                    public void actionPerformed(ActionEvent e) {
                        String text = filterText.getText();
                        if (text.length() == 0) {
                            sorter.setRowFilter(null);
                        } else {
                            try {
                                sorter.setRowFilter(
                                        RowFilter.regexFilter(text));
                            } catch (PatternSyntaxException pse) {
                                System.err.println("Erro");
                            }
                        }
                    }
                });
                frame.add(button, BorderLayout.SOUTH);
                frame.setSize(300, 250);
                frame.setVisible(true);
            }
        };
        EventQueue.invokeLater(runner);
    }

}

Any idea?

Thanks and sorry for my english

Biagio