java编程开发技巧与实例的编译测试通过的所有例程

				import java.awt.Dimension;
				import java.awt.event.*;
				import javax.swing.*;
				import javax.swing.table.*;
				
				public class Invoicer extends JFrame
				{
					protected NoEditTableModel data	=	new NoEditTableModel();
					protected JTable table	=	new JTable(data);
					protected JLabel price	=	new JLabel("^^0.0", SwingConstants.RIGHT);
					private class WindowCloser extends WindowAdapter
					{
						public void windowClosing(WindowEvent we)
						{
							System.exit(0);
						}
					}
					public Invoicer()
					{
						super("Simple Table");
						createDataColumns();
						createSampleData();
						JScrollPane scrollTable	=	new JScrollPane(table);
						price.setText("Total Price: $" + total());
						scrollTable.setPreferredSize(new Dimension(400, 100));
						getContentPane().add("Center", new JPanelBox(scrollTable, "Data"));
						getContentPane().add("South", new JPanelBox(price, "Total Cost"));
						
						addWindowListener(new WindowCloser());
						validate();
						pack();
						setLocationRelativeTo(this);
						setVisible(true);
						table.addMouseListener(new InvoicePopup(this));
						table.setToolTipText("right-click for menu");
					}
					private void createDataColumns()
					{
						data.addColumn("ID");
						data.addColumn("Description");
						data.addColumn("Unit Price");
						data.addColumn("Quantity");
						data.addColumn("Price");
					}
					private void createSampleData()
					{
						data.addRow(dataRow(19,		"IBM 770 LAPTOP", 26800, 1));
						data.addRow(dataRow(207,	"External zip drive", 580, 1));
						data.addRow(dataRow(1008,	"sdram memory chips, 128M", 150, 4));
						data.addRow(dataRow(44,		"ibm 21' triniton monitor", 3880, 1));
						data.addRow(dataRow(105,	"external keyboard, black", 480, 1));
						data.addRow(dataRow(207,	"清华同方，滥键盘", 160, 1));
						data.addRow(dataRow(45,		"ibm port replicator", 1200, 1));
					}
					private Object[] dataRow(int id, String desc, double price, int num)
					{
						Object row[]	=	new Object[5];
						row[0]	=	new Integer(id);
						row[1]	=	desc;
						row[2]	=	new Double(price);
						row[3]	=	new Integer(num);
						row[4]	=	new Double(price * num);
						return row;
					}
					protected double total()
					{
						double sum	=	0.0;
						for (int row = 0; row < data.getRowCount(); row ++)
							sum	+=	((Double)data.getValueAt(row, 4)).doubleValue();
						return sum;
					}
					public static void styleCtrl(String style)
					{
						try
						{
							String lf_wind	=	"com.sun.java.swing.plaf.windows.WindowsLookAndFeel";
							String lf_unix	=	"com.sun.java.swing.plaf.motif.MotifLookAndFeel";
							String lf_java	=	"javax.swing.plaf.metal.MetalLookAndFeel";
							if (style.equals("java"))
								UIManager.setLookAndFeel(lf_java);
							else if (style.equals("unix"))
								UIManager.setLookAndFeel(lf_unix);
							else if (style.equals("windows"))
								UIManager.setLookAndFeel(lf_wind);
						}
						catch	(Exception e)
						{
							System.err.println("Exception: " + e);
						}
					}
					public static void main(String args[])
					{
						styleCtrl("java");
						Invoicer st	=	new Invoicer();
					}
				}