question: public static void initializeEscapeMap ( ) { if ( xmlLowValueEscapeStringsInitialized == true ) { return ; } synchronized ( escapeInitLockObject ) { if ( xmlLowValueEscapeStringsInitialized == true ) { return ; } for ( int i = 0 ; i < xmlAllowedLowCharacterBound ; i ++ ) { if ( isInvalidXMLCharacter ( i ) ) { String escapedString = String . format ( "\\u%04x" , i ) ; xmlLowValueEscapeStrings [ i ] = escapedString ; } else { xmlLowValueEscapeStrings [ i ] = null ; } } xmlLowValueEscapeStringsInitialized = true ; } }
target:  Initializes the map of characters to be escaped and their corresponding escape sequences. This method will be invoked automatically the first time a string is escaped/unescaped.