Question

I have a JTable (DefaultTableModel) and a JTextField. I’d like to filter the JTable with the regex I put into the text field. When I start the program, all entries are shown, but when I enter text into the text field, no rows are displayed even though it should find the text within a row.

private void createFilter() {
    _sorter = new TableRowSorter<DefaultTableModel>(new DefaultTableModel());

    JPanel filterPanel = new JPanel();
    filterPanel.setLayout(new BorderLayout());

    JLabel filterLabel = new JLabel("Filter:");
    filterPanel.add(filterLabel, BorderLayout.WEST);

    _inputField = new JTextField();
    _inputField.setColumns(40);
    filterPanel.add(_inputField, BorderLayout.CENTER);
    _inputField.getDocument().addDocumentListener(new DocumentListener() {
        public void insertUpdate(DocumentEvent de) {
            newFilter();
        }

        public void removeUpdate(DocumentEvent de) {
            newFilter();
        }

        public void changedUpdate(DocumentEvent de) {
            newFilter();
        }
    });

    JButton clearButton = new JButton("X");
    clearButton.addActionListener(new ActionListener() {
        @Override
        public void actionPerformed(ActionEvent e) {
            _inputField.setText("");
        }
    });
    filterPanel.add(clearButton, BorderLayout.EAST);

    _mainFrame.add(filterPanel, BorderLayout.SOUTH);
}

private void newFilter() {
    RowFilter<DefaultTableModel, Object> rowFilter = null;
    try {
        rowFilter = RowFilter.regexFilter(_inputField.getText());
    }
    catch(java.util.regex.PatternSyntaxException ex) {
        return;
    }
    _sorter.setRowFilter(rowFilter);
    _table.setRowSorter(_sorter);
}

My debugger shows me, that rowFilter is initialized, so it can’t be because of a wrong RegEx. Also newFilter() is called at every keystroke.

Thanks in advance. I’d be happy to provide more information if needed.

Sincerely,
Michael

Answer 1

It seems that the JTable and the TableRowSorter each have a different table model. The TableRowSorter should be constructed with the table model of the JTable.