How can I perform a case-insensitive filter on a JTable?

I am making a table with a text field below it where you can type in a word to filter the table. It works, but what I want to do is be able to filter it with the word typed in, but ignoring the case of the word. Is there a way to accomplish this without creating a custom `RowFilter`? You can run this SCCEE to see what I'm talking about. I want to be able to type in `usa` and it'll filter `USA`. ``` import java.awt.BorderLayout; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import javax.swing.JApplet; import javax.swing.JButton; import javax.swing.JLabel; import javax.swing.JPanel; import javax.swing.JScrollPane; import javax.swing.JTable; import javax.swing.JTextField; import javax.swing.RowFilter; import javax.swing.table.TableModel; import javax.swing.table.TableRowSorter; public class TestTableSortFilter extends JApplet { private String[] columnNames = {"Country", "Capital", "Population in Millions", "Democracy"}; private Object[][] data = { {"USA", "Washington DC", 280, true}, {"Canada", "Ottawa", 32, true}, {"United Kingdom", "London", 60, true}, {"Germany", "Berlin", 83, true}, {"France", "Paris", 60, true}, {"Norway", "Oslo", 4.5, true}, {"India", "New Delhi", 1046, true} }; private JTable jTable = new JTable(data, columnNames); private TableRowSorter<TableModel> rowSorter = new TableRowSorter<>(jTable.getModel()); private JTextField jtfFilter = new JTextField(); private JButton jbtFilter = new JButton("Filter"); public TestTableSortFilter() { jTable.setRowSorter(rowSorter); JPanel panel = new JPanel(new BorderLayout()); panel.add(new JLabel("Specify a word to match:"), BorderLayout.WEST); panel.add(jtfFilter, BorderLayout.CENTER); add(panel, BorderLayout.SOUTH); add(new JScrollPane(jTable), BorderLayout.CENTER); jtfFilter.addActionListener(new ActionListener(){ @Override public void actionPerformed(ActionEvent e) { String text = jtfFilter.getText(); if (text.trim().length() == 0) { rowSorter.setRowFilter(null); } else { rowSorter.setRowFilter(RowFilter.regexFilter(text)); } } }); } } ``` Is there maybe something I can pass to the `regexFilter(text)`, that will give me the desired result? ``` rowSorter.setRowFilter(RowFilter.regexFilter(text)); ```