question: public static byte [ ] decodeFromString ( String src ) { if ( src == null ) { return null ; } if ( src . length ( ) == 0 ) { return new byte [ 0 ] ; } byte [ ] result ; try { result = delegate . decode ( src . getBytes ( DEFAULT_CHARSET . displayName ( ) ) ) ; } catch ( UnsupportedEncodingException e ) { throw new IllegalStateException ( e ) ; } return result ; }
target:  Base64-decode the given byte array from an UTF-8 String.