tablemodeldemo.java

《java事件处理指南》一书的代码,好东西

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

public class TableModelDemo extends JFrame implements TableModelListener
{
   private JTable table; 
   private DefaultTableModel model;
   private JTextField jtf;

   public TableModelDemo() 
   {
      Object[][] data = {
         {"Jackson", new Integer(12345), "555-123-4567"},
         {"Zachary", new Integer(65432), "555-567-1234"} };
      String[] headers = { "Name", "ID number", "Phone" };

/*  A simple table is created and placed on a JFrame.  The TableModel  */
/*  of the table registers a TableColumnModelListener.                 */

      model = new DefaultTableModel(data, headers);
      model.addTableModelListener(this);

      table = new JTable(model);

      jtf = new JTextField(25);
      jtf.setEditable(false);

      JPanel centerPanel = new JPanel();
      centerPanel.add(new JScrollPane(table));

      JPanel southPanel = new JPanel();
      southPanel.add(jtf);

      getContentPane().add(centerPanel, BorderLayout.CENTER);
      getContentPane().add(southPanel, BorderLayout.SOUTH);

      setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
      setBounds(100, 100, 600, 300);
      setVisible(true);
   }

/*  The TableModelDemo class serves as the TableModelListener so it  */
/*  provides an implementation of the tableChanged() method.  When   */
/*  the user changes the data in one of the table cells, a           */
/*  TableModelEvent is generated and sent to the tableChanged()      */
/*  method.  The location of the change and the change itself is     */
/*  registered inside a JTextField.                                  */

   public void tableChanged(TableModelEvent event)
   {
      if ( event.getType() == TableModelEvent.UPDATE )
      {
         int row = event.getFirstRow();
         int column = event.getColumn();
         jtf.setText("data at ("+row+","+column+") is now "+
                      model.getValueAt(row,column));
      }
   }

   public static void main(String args[]) 
   {
      TableModelDemo demo = new TableModelDemo();
   }
}