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copied!<p>Okay, not the most brilliant of examples, but it gets the point across.</p> <p>Plug in some descent data...</p> <pre><code>import java.awt.BorderLayout; import java.awt.EventQueue; import java.awt.GridLayout; import java.awt.PopupMenu; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.awt.event.MouseAdapter; import java.awt.event.MouseEvent; import java.text.SimpleDateFormat; import java.util.ArrayList; import java.util.List; import javax.swing.Action; import javax.swing.JButton; import javax.swing.JFrame; import javax.swing.JPanel; import javax.swing.JScrollPane; import javax.swing.JTable; import javax.swing.RowSorter; import javax.swing.SortOrder; import static javax.swing.SortOrder.ASCENDING; import static javax.swing.SortOrder.DESCENDING; import javax.swing.UIManager; import javax.swing.UnsupportedLookAndFeelException; import javax.swing.table.DefaultTableModel; import javax.swing.table.JTableHeader; import javax.swing.table.TableModel; import javax.swing.table.TableRowSorter; public class TestTableSorter { public static void main(String[] args) { new TestTableSorter(); } public TestTableSorter() { EventQueue.invokeLater(new Runnable() { @Override public void run() { try { UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName()); } catch (ClassNotFoundException ex) { } catch (InstantiationException ex) { } catch (IllegalAccessException ex) { } catch (UnsupportedLookAndFeelException ex) { } try { SimpleDateFormat sdf = new SimpleDateFormat("dd/mm/yyyy"); final JTable table = new JTable(); DefaultTableModel model = new DefaultTableModel( new Object[][]{ {"A", 1, sdf.parse("12/05/2000")}, {"B", 2, sdf.parse("12/06/2000")}, {"C", 3, sdf.parse("12/07/2000")}, {"D", 4, sdf.parse("12/08/2000")}, {"E", 5, sdf.parse("12/09/2000")}, {"F", 1, sdf.parse("12/10/2000")}, {"G", 2, sdf.parse("12/11/2000")}, {"H", 3, sdf.parse("12/12/2000")}, {"I", 4, sdf.parse("12/01/1990")}, {"J", 5, sdf.parse("12/02/1990")}, {"K", 1, sdf.parse("12/03/1990")}, {"L", 2, sdf.parse("12/04/1995")}, {"M", 3, sdf.parse("12/05/1995")}, {"N", 4, sdf.parse("12/06/1995")}, {"O", 5, sdf.parse("12/07/1995")}, {"P", 1, sdf.parse("12/08/1980")}, {"Q", 2, sdf.parse("12/09/1980")}, {"R", 3, sdf.parse("12/10/1980")}, {"S", 4, sdf.parse("12/11/1980")}, {"T", 5, sdf.parse("12/12/1980")}, {"U", 1, sdf.parse("12/01/1985")}, {"V", 2, sdf.parse("12/02/1985")}, {"W", 3, sdf.parse("12/03/1985")}, {"X", 4, sdf.parse("12/04/1985")}, {"Y", 5, sdf.parse("12/05/1985")}, {"Z", 1, sdf.parse("12/06/1985")},}, new Object[]{"Name", "Number", "Date"}); table.setModel(model); table.setAutoCreateRowSorter(true); JPanel panel = new JPanel(new GridLayout(1, 3)); panel.add(createButton(table, 0)); panel.add(createButton(table, 1)); panel.add(createButton(table, 2)); JFrame frame = new JFrame("Test"); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); frame.setLayout(new BorderLayout()); frame.add(panel, BorderLayout.NORTH); frame.add(new JScrollPane(table)); frame.pack(); frame.setLocationRelativeTo(null); frame.setVisible(true); } catch (Exception exp) { exp.printStackTrace(); } } protected JButton createButton(JTable table, int col) { JButton btn = new JButton(""); btn.addActionListener(new SortAction(table, col)); return btn; } }); } public class SortAction implements ActionListener { private JTable table; private int column; public SortAction(JTable table, int column) { this.table = table; this.column = column; } @Override public void actionPerformed(ActionEvent e) { RowSorter<? extends TableModel> rowSorter = table.getRowSorter(); List<RowSorter.SortKey> sortKeys = new ArrayList<RowSorter.SortKey>(rowSorter.getSortKeys()); boolean found = false; SortOrder order = SortOrder.ASCENDING; for (int index = 0; index < sortKeys.size(); index++) { RowSorter.SortKey key = sortKeys.get(index); if (key.getColumn() == column) { found = true; System.out.println("Found existing sort key for column " + column); switch (key.getSortOrder()) { case ASCENDING: order = SortOrder.DESCENDING; sortKeys.set(index, new RowSorter.SortKey(column, order)); break; case DESCENDING: order = SortOrder.UNSORTED; sortKeys.remove(index); break; } break; } } if (!found) { System.out.println("Add new sort key for column " + column); sortKeys.add(new RowSorter.SortKey(column, order)); } System.out.println("List contains " + sortKeys.size()); RowSorter newSorter = new TableRowSorter(table.getModel()); newSorter.setSortKeys(sortKeys); table.setRowSorter(newSorter); switch (order) { case ASCENDING: ((JButton) e.getSource()).setText("+"); break; case DESCENDING: ((JButton) e.getSource()).setText("-"); break; default: ((JButton) e.getSource()).setText(" "); break; } } } } </code></pre>

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