Problemas con íconos

[SmartColombia]

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

class java1403 extends JPanel {

public java1403() {
setLayout( new GridLayout( 2,2 ) );

JLabel etiq1 = new JLabel();
etiq1.setText( "Etiqueta1" );
add( etiq1 );

JLabel etiq2 = new JLabel( "Etiqueta2" );
etiq2.setFont( new Font( "Helvetica", Font.BOLD, 18 ) );
add( etiq2 );

ImageIcon imagen = new ImageIcon( "F:\\Borrar\\star0.gif" );
JLabel etiq3 = new JLabel( "Etiqueta3", imagen,SwingConstants.LEADING );
etiq3.setVerticalTextPosition( SwingConstants.TOP );
add( etiq3 );

JLabel etiq4 = new JLabel( "Etiqueta4",SwingConstants.RIGHT );
add( etiq4 );
}

public static void main( String args[] ) {
JFrame ventana = new JFrame( "Tutorial de Java, Swing" );

ventana.addWindowListener( new WindowAdapter() {
public void windowClosing( WindowEvent evt ){
System.exit( 0 );
}
} );
ventana.getContentPane().add( new java1403(),BorderLayout.CENTER );
ventana.setSize( 300,150 );

ventana.setVisible( true );
}
}