jtable 數字排序

下面的例子是實現java的jtable控制項，按數值排序。

import java.awt.*;  
import java.awt.event.ActionListener;  
import java.util.Comparator;  
import javax.swing.*;  
import javax.swing.table.*; 

public class TableModel2
{ 
 public static void main(String[] args)
 {  
  String[][] data = new String[][] {
    { "49", "a", "Test1" },
    { "24", "b", "Test2" },
    { "9", "c", "Test3" },
    { "5", "d", "Test4" } };
  
  String[] title = new String[] { "a1", "b1", "c1" }; 
 
  DefaultTableModel model = new DefaultTableModel(data, title);
  JTable table = new JTable(model);
  String[] rowValues = {"1","f","TestAdd"};
  model.addRow(rowValues);
 
  final TableRowSorter<DefaultTableModel> sorter = new TableRowSorter<DefaultTableModel>(model);
  
  final JTextField field = new JTextField(20); 
  final JComboBox list = new JComboBox(title);
  JButton button = new JButton("Find"); 
   
  table.setRowSorter(sorter);
 
  sorter.setComparator(0, new Comparator<Object>()
  {
   public int compare(Object arg0, Object arg1)
   { 
    try{  
     int a = Integer.parseInt(arg0.toString());  
     int b = Integer.parseInt(arg1.toString()); 
     return a-b;  
    }catch(NumberFormatException e){  
     return 0;  
    }  
   }
  });  
  
  button.addActionListener(new ActionListener()
  {  
   public void actionPerformed(java.awt.event.ActionEvent e)
   {  
    int index = list.getSelectedIndex();  
    sorter.setRowFilter(RowFilter.regexFilter(field.getText(), index));
   }  
  });  
 
  JFrame frame = new JFrame("TableSort");  
  JPanel contentPanel = new JPanel(new BorderLayout());  
  JPanel searchPanel = new JPanel();  
  searchPanel.add(list);  
  searchPanel.add(field);  
  searchPanel.add(button);  
  contentPanel.add(searchPanel, BorderLayout.NORTH);  
  contentPanel.add(new JScrollPane(table), BorderLayout.CENTER);  
  frame.getContentPane().add(contentPanel);  
  frame.pack();  
  frame.setLocationRelativeTo(null);  
  frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);  
  frame.setVisible(true);  
 }
}