question: static void exportPrefs ( Preferences prefs , OutputStream stream , boolean withSubTree ) throws IOException , BackingStoreException { indent = - 1 ; BufferedWriter out = new BufferedWriter ( new OutputStreamWriter ( stream , "UTF-8" ) ) ; out . write ( HEADER ) ; out . newLine ( ) ; out . newLine ( ) ; out . write ( DOCTYPE ) ; out . write ( " '" ) ; out . write ( PREFS_DTD_NAME ) ; out . write ( "'>" ) ; out . newLine ( ) ; out . newLine ( ) ; flushStartTag ( "preferences" , new String [ ] { "EXTERNAL_XML_VERSION" } , new String [ ] { String . valueOf ( XML_VERSION ) } , out ) ; flushStartTag ( "root" , new String [ ] { "type" } , new String [ ] { prefs . isUserNode ( ) ? "user" : "system" } , out ) ; flushEmptyElement ( "map" , out ) ; StringTokenizer ancestors = new StringTokenizer ( prefs . absolutePath ( ) , "/" ) ; exportNode ( ancestors , prefs , withSubTree , out ) ; flushEndTag ( "root" , out ) ; flushEndTag ( "preferences" , out ) ; out . flush ( ) ; out = null ; }
target:  utilities for Preferences export