Enable or disable encryption in a JPasswordField

[Pojahn_M]

Setting echo char to 'u\0000' will disable masking on a JPasswordField, but it still forbid copy/cut operations.
This bug(or whatever you call it) do not exist on java.awt.TextField, but the methods of returning password is very unsafe on that class.

I have tried many solutions, such as a adding a JTextField and JPasswordField in a JLayedPane. Did not worked.
I tried writing my own password field class by extending JTextField, but its to many bugs.
Also tried a CardLayer, couldnt figure out how to use it.

What options do I have?

[Pojahn_M]

Alright, I am progressing on my own class. I have two bugs I need help with.
Please try it out:

import java.awt.event.KeyAdapter;
import java.awt.event.KeyEvent;

import javax.swing.JFrame;
import javax.swing.JTextField;
import javax.swing.UIManager;

@SuppressWarnings("serial")
public final class PasswordBar extends JTextField
{
    public static void main(String[] args) throws Exception
    {
    	JFrame f = new JFrame ();
    	f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    	f.setSize(300,300);
    	
    	PasswordBar pw =new PasswordBar ();
    	pw.enableMasking();
    	
    	f.add(pw);
    	
    	f.setVisible(true);
    }
    
	private transient StringBuilder password;
	protected char echoChar;
	protected boolean echoEnabled;
	
	public PasswordBar ()
	{
		super ();
	}
	
	public PasswordBar (javax.swing.text.Document doc, String text, int columns)
	{
		super (doc, text, columns);
	}
	
	public PasswordBar (int columns)
	{
		super (columns);
	}
	
	public PasswordBar (String text)
	{
		super (text);
	}
	
	public PasswordBar (String text, int columns)
	{
		super (text, columns);
	}
	
	{
		password = new StringBuilder ();
		echoChar = '*';
		echoEnabled = false;
	}
	
	public void setEchoChar (char echoChar)
	{
		this.echoChar = echoChar;
	}

	public void enableMasking ()
	{
		echoEnabled = true;

    	this.addKeyListener(new KeyAdapter()
    	{
    		@Override
    		public void keyPressed(KeyEvent e)
    		{
    			if (!echoEnabled)
    				return;
    			
    			char c = e.getKeyChar();
    				
    			if (c == (char) 22)//Test is copied, ie a lot of characters
    				System.exit(0);//TESTING

    			if (c == '\n')//NewLine
    				return;

    			if (c == (char)8)//Backspace
    			{
    				try
    				{
    					password.deleteCharAt(password.length() - 1);
    					System.out.println(password);
    				}
    				catch (Exception ex) {}
    				return;
    			}

    			if (c != KeyEvent.CHAR_UNDEFINED && !e.isActionKey())
    			{
    				password.append (c);
    				int length = getText().length();
    				StringBuilder dummy = new StringBuilder(length);
    				for (int i = 0; i < length; i++)
    					dummy.append(echoChar);

    				setText(dummy.toString());

    				System.out.println(password);
    			}
    		}
    	});
	}
	
//	@Override
//	public void copy ()
//	{
//		if (echoEnabled)
//			UIManager.getLookAndFeel().provideErrorFeedback(this);
//		else
//			super.copy();
//	}
//	
//	@Override
//	public void cut ()
//	{
//		if (echoEnabled)
//			UIManager.getLookAndFeel().provideErrorFeedback(this);
//		else
//			super.cut();
//	}
//	
//	@Override
//	public void paste ()
//	{
//		if (echoEnabled)
//			UIManager.getLookAndFeel().provideErrorFeedback(this);
//		else
//			super.paste();
//	}
	
	public void disableMasking ()
	{
		echoEnabled = false;
		setText(password.toString());
		clearPassword();
	}
	
	public char[] getPassword ()
	{
		char[] pw = new char[password.length()];
		for (int i = 0; i < pw.length; i++)
			pw[i] = password.charAt(i);
		
		return pw;
	}
	
	public void clearPassword ()
	{
		for (int i = 0; i < password.length(); i++)
			password.setCharAt(i, '0');
		
		password = new StringBuilder ();
	}	
}

First bug: The last entered character will not be masked. So, if you enter abc, it will look like this: **c. If you now write/append 'd', it will look like this ***d.
How to I resolve this?
The second and final bug, is when I am pasting text. First of all, I want to disable text pasting(you can see how I did on the commented-out methods), but it did not work. So I tried to make pasting work, but it does not work at all.
When a text is pasted, getKeyChar return char value 22, instead of a char array/string. How do I handle this? I would also like to know how I disable copy & paste from this box. Copying text masked text would not be a security issue in this class. Pasting could work too, but it seems to much of a nightmare to fix plus it is unsafe as user can forget what they type.