sun.com/dtd/preferences.dtd"> The UTF-8 character encoding will be used.
This method is an exception to the general rule that the results of concurrently executing multiple methods in this class yields results equivalent to some serial execution. If the preferences at this node are modified concurrently with an invocation of this method, the exported preferences comprise a "fuzzy snapshot" of the preferences contained in the node; some of the concurrent modifications may be reflected in the exported data while others may not.
@param os the output stream on which to emit the XML document.
@throws IOException if writing to the specified output streamresults in an IOException.
@throws BackingStoreException if preference data cannot be read frombacking store.
@see #importPreferences(InputStream)
@throws IllegalStateException if this node (or an ancestor) has beenremoved with the {@link #removeNode()} method.