import java.awt.BorderLayout; 
 import java.awt.Color; 
 import java.awt.Component; 
 import java.awt.Container; 
 import java.awt.FlowLayout; 
 import java.awt.event.ActionEvent; 
 import java.awt.event.ActionListener; 
 import java.util.HashMap; 
 import java.util.Vector; 
  
 import javax.swing.JButton; 
 import javax.swing.JFrame; 
 import javax.swing.JOptionPane; 
 import javax.swing.JPanel; 
 import javax.swing.JScrollPane; 
 import javax.swing.JTable; 
 import javax.swing.table.DefaultTableCellRenderer; 
 import javax.swing.table.DefaultTableModel; 
 import javax.swing.table.TableColumnModel; 
  
 public class ExchangeDemo extends JFrame { 
 	/** 
 	 *  
 	 */ 
 	private static final long serialVersionUID = 1L; 
 	private Vector <Vector <Object>> data = new Vector <Vector <Object>>(); 
 	private static final Vector <String> COLUMN_NAMES = new Vector <String>(); 
 	private JTable table; 
 	private int iCount = 0; 
 	// 用来存储id和行的对应关系，看着方便一点 
 	private HashMap <String, Integer> idToRowMap = new HashMap <String, Integer>(); 
  
 	DefaultTableCellRenderer render = new DefaultTableCellRenderer() { 
 		@Override 
 		public Component getTableCellRendererComponent(JTable table, 
 				Object value, boolean isSelected, boolean hasFocus, int row, 
 				int column) { 
  
 			Component c = super.getTableCellRendererComponent(table, value, 
 					isSelected, hasFocus, row, column); 
 			if (row  < 10) { 
 				setBackground(row % 2 == 0 ? Color.green : Color.blue); 
 			} else { 
 				setBackground(Color.red); 
 			} 
 			return c; 
 		} 
 	}; 
  
 	public ExchangeDemo() { 
 		super(); 
 		initData(); 
 		Container c = getContentPane(); 
 		table = new JTable(); 
 		table.setModel(new DefaultTableModel(data, COLUMN_NAMES) { 
  
 			/** 
 			 *  
 			 */ 
 			private static final long serialVersionUID = 1L; 
  
 			@Override 
 			public void setValueAt(Object value, int row, int column) { 
 				Object oValue = getValueAt(row, column); 
 				if (value.equals(oValue)) { 
 					return; 
 				} 
  
 				if (column == 0) { 
 					int iValue; 
 					try { 
 						iValue = Integer.parseInt(value.toString()); 
 					} catch (Exception e) { 
 						// TODO: 这地方的判断小子自己做吧 
 						e.printStackTrace(); 
 						return; 
 					} 
  
 					if (iValue - 1 >= data.size()) { 
 						// 这地方通常好的软件有一些比较强的处理，我就先拿这个顶了 
 						JOptionPane.showMessageDialog(table, "error"); 
 						return; 
 					} 
 					if (row  < data.size() && column  < COLUMN_NAMES.size()) { 
  
 						Object oldValue = data.get(row).get(column); 
  
 						data.get(row).set(column, 
 								value == null ? "" : value.toString()); 
 						data.get(idToRowMap.get(String.valueOf(value))).set( 
 								column, oldValue); 
 						// 
 						updateMapInfo(value, oldValue); 
 						fireTableDataChanged(); 
 					} 
 				} else if (column == 3) {