question: private static final Set < File > encode ( String src ) { if ( src == null || src . length ( ) == 0 ) return new HashSet < File > ( ) ; StringTokenizer tokenizer = new StringTokenizer ( src , ";" ) ; int size = tokenizer . countTokens ( ) ; Set < File > set = new HashSet < File > ( ) ; for ( int i = 0 ; i < size ; i ++ ) set . add ( new File ( tokenizer . nextToken ( ) ) ) ; return set ; }
target:  Splits the string into a Set    