PassWd hidden

من فترة كنت سألت عن حماية ال passwd عن المستخدم و خصوصا فى برامج ال jdbc

دى فكرة بس مش عارف ازاى كانت كويسة ولا لأ؟؟؟

import java.io.*;
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
public class Passwd extends JFrame
{
	private Container area;
	private TextField text;
	private JButton Passwd,Check;
	private File file;
	public Passwd()
	{
  this.setTitle("Passwd hidden !");
  this.setVisible(true);
  this.setSize(350,100);
  this.setDefaultCloseOperation(EXIT_ON_CLOSE);
  area=this.getContentPane();
  this.setContentPane(area);
  area.setLayout(new FlowLayout());
  area.add(Passwd=new JButton("Add the PassWord"));
  Passwd.setEnabled(false);
  area.add(Check=new JButton("CheckPassWord"));
  area.add(text=new TextField("",15));
  text.addTextListener(new textListener());
  text.requestFocus();
  this.addKeyListener(new Keys());
  text.addKeyListener(new Keys());
  Passwd.addActionListener(new PassWd());
  Check.addActionListener(new Check());
  file=new File("PassWd.dat");
  Check.setEnabled(file.exists());
  this.show();
	}
	private class PassWd implements ActionListener
	{
  public void actionPerformed(ActionEvent e)
  {
 	 Add();
  }
	}
	private void Add()
	{
  try
  {
 	 FileWriter writer=new FileWriter("PassWd.dat");
 	 BufferedWriter Buffer=new BufferedWriter(writer);
 	 Buffer.write(text.getText());
 	 Buffer.close();
      }
  catch(IOException E)
  {}
  text.setText("");
	}
	private class Check implements ActionListener
	{
  public void actionPerformed(ActionEvent e)
  {
 	 CheckPass();
  }
	}
	private void CheckPass()
	{
  try
  {
 	 FileReader reader=new FileReader("PassWd.dat");
 	 BufferedReader Read=new BufferedReader(reader);
 	 String PassWD=Read.readLine();
 	 if(!PassWD.equals(""))
 	 {
    Toolkit.getDefaultToolkit().beep();
    JOptionPane.showMessageDialog(new Frame(),"PassWord Found ! "+"\""+PassWD+"\"","Found",JOptionPane.WARNING_MESSAGE);
 	 }
 	 if(PassWD.equals(""))
 	 {
    Toolkit.getDefaultToolkit().beep();
    JOptionPane.showMessageDialog(new Frame(),"PassWord Not Found !","Not Found",JOptionPane.WARNING_MESSAGE);
 	 }
 	 Read.close();
  }
  catch(IOException err){}
	}
	private class Keys extends KeyAdapter
	{
  public void keyPressed(KeyEvent e)
  {
 	 if(e.getKeyCode()==KeyEvent.VK_ESCAPE)
 	 {
    System.exit(0);
 	 }
 	 if(e.getKeyCode()==KeyEvent.VK_ENTER)
 	 {
    if(Passwd.isEnabled())
    {
   	 Add();
    }
 	 }
 	 if(e.getKeyCode()==KeyEvent.VK_F3)
 	 {
    CheckPass();
 	 }
  }
	}
	private class textListener implements TextListener
	{
  public void textValueChanged(TextEvent e)
  {
 	 if(!text.getText().equals(""))
 	 {
    Passwd.setEnabled(true);
 	 }
 	 if(text.getText().equals(""))
 	 {
    Passwd.setEnabled(false);
 	 }
  }
	}
	public static void main(String[]args)
	{
  try
  {
 	 UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
  }
  catch(Exception error)
  {
 	 JOptionPane.showMessageDialog(new Frame(),"Error setting System Look !","Error",JOptionPane.WARNING_MESSAGE);
  }
  new Passwd();
	}
}