Obtener icono de un archivo

import java.io.*;
import javax.swing.*;
import javax.imageio.*;

public class IconExtract {
public static void main(String[] args) throws Exception {

File file = new File("C:/windows/regedit.exe");

//Obtener metadata y crear un icono
sun.awt.shell.ShellFolder sf = sun.awt.shell.ShellFolder.getShellFolder(file);
Icon icon = new ImageIcon(sf.getIcon(true));
System.out.println("type = " + sf.getFolderType());

//mostrar el icono
JLabel ficon = new JLabel(s, icon, SwingConstants.LEFT);

/*Modo 2 (miniatura)
//Obtener metadata y crear un icono
Icon icon = javax.swing.filechooser.FileSystemView.getFileSystemView().getSystemIcon(file);

//mostrar el icono
JLabel ficon = new JLabel(s, icon, SwingConstants.LEFT);

*/

JFrame frame = new JFrame();
frame.getContentPane().add(ficon);
frame.pack();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setVisible(true);
}

}