Adjust font size in Swing applications global

Use this snippet to set the size of all fonts of the current Swing look and feel:

public static void setFontSizeGlobal( int size )
{
for ( Enumeration e = UIManager.getDefaults().keys(); e.hasMoreElements(); )
{
    Object key   = e.nextElement();
    Object value = UIManager.get( key );

    if ( value instanceof Font )
    {
        Font f = (Font) value;

        UIManager.put( key, new FontUIResource( f.getName(), f.getStyle(), size ) );
    }
}
}

Can we compact the code? Not with the extended for! It is true that UIDefaults is a subtype of Hashtable but the methods entrySet() or keySet() returns an empty collection.