import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.table.DefaultTableModel;
import java.util.*;
import java.io.*;

public class CPT extends JPanel implements ActionListener
{
   JButton ModifyEntriesButton, ViewEntriesButton, SearchEntriesButton, SaveButton, BackButton;
   private final static String newline = "\n";
   private DefaultTableModel model;

   public CPT ()
   {
super (new GridLayout (3, 0));

model = new PropertiesModel ("entries.data");

ModifyEntriesButton = new JButton ("Modify Entries");
ModifyEntriesButton.setVerticalTextPosition (AbstractButton.TOP);
ModifyEntriesButton.setHorizontalTextPosition (AbstractButton.LEFT);
ModifyEntriesButton.setToolTipText ("Click this button to modify database entries.");
ModifyEntriesButton.setMnemonic (KeyEvent.VK_M);
ModifyEntriesButton.setActionCommand ("ModifyEntries");
ModifyEntriesButton.addActionListener (this);

ViewEntriesButton = new JButton ("View Entries");
ViewEntriesButton.setVerticalTextPosition (AbstractButton.CENTER);
ViewEntriesButton.setHorizontalTextPosition (AbstractButton.LEFT);
ViewEntriesButton.setToolTipText ("Click this button to add view all database entries.");
ViewEntriesButton.setMnemonic (KeyEvent.VK_V);
ViewEntriesButton.setActionCommand ("ViewEntries");
ViewEntriesButton.addActionListener (this);

SearchEntriesButton = new JButton ("Search Entries");
SearchEntriesButton.setVerticalTextPosition (AbstractButton.BOTTOM);
SearchEntriesButton.setHorizontalTextPosition (AbstractButton.LEFT);
SearchEntriesButton.setToolTipText ("Click this button to search through all database entries.");
SearchEntriesButton.setMnemonic (KeyEvent.VK_S);
SearchEntriesButton.setActionCommand ("SearchEntries");
SearchEntriesButton.addActionListener (this);

SaveButton = new JButton ("Save");
SaveButton.setVerticalTextPosition (AbstractButton.TOP);
SaveButton.setHorizontalTextPosition (AbstractButton.RIGHT);
SaveButton.setToolTipText ("Click this button to save database entries.");
SaveButton.setMnemonic (KeyEvent.VK_S);
SaveButton.setActionCommand ("Save");
SaveButton.addActionListener (this);

BackButton = new JButton ("Back");
BackButton.setVerticalTextPosition (AbstractButton.BOTTOM);
BackButton.setHorizontalTextPosition (AbstractButton.RIGHT);
BackButton.setToolTipText ("Click this button to return to the main menu.");
BackButton.setMnemonic (KeyEvent.VK_B);
BackButton.setActionCommand ("Back");
BackButton.addActionListener (this);
add (ModifyEntriesButton);
add (ViewEntriesButton);
add (SearchEntriesButton);
   }

   class PropertiesModel extends DefaultTableModel
   {
public PropertiesModel (String filename)
{
    addColumn ("Item Number");
    addColumn ("Description");
    addColumn ("Price");

    //Fill model with data from property file
    Properties props = readFile (filename);
    if (props != null)
    {
 Enumeration coll = props.keys ();
 while (coll.hasMoreElements ())
 {
     String property = (String) coll.nextElement ();
     String value = props.getProperty (property, "");
     addRow (new Object[]
     {
  property, value
     }
     );
 }
    }
}
   }


   private Properties readFile (String filename)
   {
try
{
    Properties props = new Properties ();
    props.load (new FileInputStream (filename));
    return props;
}
catch (IOException ioe)
{
    return null;
}
   }


   private boolean saveFile (String filename)
   {
try
{
    Properties props = new Properties ();
    for (int i = 0; i < model.getRowCount (); i++)
 props.put (model.getValueAt (i, 0), model.getValueAt (i, 1));
    props.store (new FileOutputStream (filename), null);
    return true;
}
catch (IOException ioe)
{
    return false;
}
   }


   private void ModifyEntriesFunction ()
   {
removeAll ();
add (new JScrollPane (new JTable (model)));
//add (new JScrollPane (new JTable (model)), BorderLayout.CENTER);
add (SaveButton);
add (BackButton);
invalidate ();
updateUI ();
   }


   public void actionPerformed (ActionEvent e)
   {
if ("ModifyEntries".equals (e.getActionCommand ()))
{
    ModifyEntriesFunction ();
}
if ("ViewEntries".equals (e.getActionCommand ()))
{
    removeAll ();
    add (BackButton);
    invalidate ();
    updateUI ();
}
if ("SearchEntries".equals (e.getActionCommand ()))
{
    removeAll ();
    add (BackButton);
    invalidate ();
    updateUI ();
}
if ("Back".equals (e.getActionCommand ()))
{
    removeAll ();
    add (ModifyEntriesButton);
    add (ViewEntriesButton);
    add (SearchEntriesButton);
    invalidate ();
    updateUI ();
}
if ("Save".equals (e.getActionCommand ()))
{
    if (saveFile ("entries.data"))
 JOptionPane.showMessageDialog (null, "File saved successfully.");
    else
 JOptionPane.showMessageDialog (null, "File could not be saved!");
}
   }


   // Create the GUI and show it. For thread safety,
   // this method should be invoked from the
   // event-dispatching thread.

   private static void createAndShowGUI ()
   {
//Make sure we have nice window decorations.
JFrame.setDefaultLookAndFeelDecorated (true);

//Create and set up the window.
JFrame frame = new JFrame ("Swisha Computer House");
frame.setDefaultCloseOperation (JFrame.EXIT_ON_CLOSE);

//Create and set up the content pane.
JComponent newContentPane = new CPT ();
newContentPane.setOpaque (true); //content panes must be opaque
frame.setContentPane (newContentPane);
//Display the window.
frame.pack ();
frame.setSize (300, 300);
frame.setVisible (true);
   }


   public static void main (String[] args)
   {
//Schedule a job for the event-dispatching thread:
//creating and showing this application's GUI.
javax.swing.SwingUtilities.invokeLater (new Runnable ()
{
    public void run ()
    {
 createAndShowGUI ();
    }
}
);
   }
}Attached Images proj.JPG (31.9 KB, 2 views)