JFormattedTextField não Recebe o Foco

JFormattedTextField.setFocusLostBehavior(JFormattedTextField.COMMIT); // tenta inicializar o componente com este comando
JFormattedTextField.requestFocus(); //depois chame normalmente o requestFocus()

import java.text.*;
 import javax.swing.*;
 import javax.swing.text.*;
 import java.awt.*;
 import java.awt.event.*;
 

public class MyFormatted extends JFrame {
        
    private JFormattedTextField formatter;
    private MaskFormatter mask;
    private JButton button1, button2;
    private JLabel label1, label2;
    private JPanel panel;
    
    public MyFormatted(){
    	super( "My Formatter" );
    	
    	panel = new JPanel();
    	
    	label1 = new JLabel( "Tytep something: " );
    	label2 = new JLabel( "          " );
    	
    	try{
    		mask = new MaskFormatter( "********************" );
    	}
    	catch( ParseException e ){}
    	
    	formatter = new JFormattedTextField( mask );
    	formatter.requestFocus();
    	
    	button1 = new JButton( "Clear" );
    	button1.addActionListener( 
    		new ActionListener(){
    			public void actionPerformed( ActionEvent e ){
    				label2.setText( " get: " + formatter.getText() );
    				formatter.setText( "" );
    				formatter.requestFocus();
    			}
    		}
    	);
    	
    	button2 = new JButton( "Exit" );    	
    	button2.addActionListener(
    		new ActionListener(){
    			public void actionPerformed( ActionEvent e ){
    				System.exit( 0 );
    			}
    		}
    	);
    	panel.add( label1 );
    	panel.add( formatter );
    	panel.add( button1 );
    	panel.add( label2 );
    	panel.add( button2 );
    	
    	getContentPane().add( panel );
    	getContentPane().setVisible( true );
    	
    	
    }
    	
    public static void main(String[] args) {
        MyFormatted app = new MyFormatted();
        app.setDefaultCloseOperation( JFrame.EXIT_ON_CLOSE );
        app.pack();
        app.show();
    }
}