tablecolumndemo.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 TableColumnDemo extends JFrame 
{
   private JTable table; 
   private DefaultTableModel model;
   private JTextField jtf;

   public TableColumnDemo() 
   {
      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 TableColumnModel of the table registers a        */
/*  TableColumnModelListener.                            */

      model = new DefaultTableModel(data, headers);

      table = new JTable(model);
      TableColumnModel columnModel = table.getColumnModel();
      columnModel.addColumnModelListener(new ColumnModelHandler());

      jtf = new JTextField(20);
      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 TableColumnModelListener is implemented as an inner class  */
/*  In this case, the listener only monitors column movements, so  */
/*  the other methods are implemented as stub methods.  Whenever   */
/*  the user moves a column or causes a column to be moved, a      */
/*  TableColumnModelEvent is generated and sent to the             */
/*  columnMoved() method.                                          */

   class ColumnModelHandler implements TableColumnModelListener
   {
      public void columnMoved(TableColumnModelEvent event)
      {
         jtf.setText("column "+event.getFromIndex()+" moved");
      }

      public void columnAdded(TableColumnModelEvent event) {}
      public void columnMarginChanged(ChangeEvent event) {}
      public void columnRemoved(TableColumnModelEvent event) {}
      public void columnSelectionChanged(ListSelectionEvent event) {}
   }

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