question: public static void main ( String [ ] args ) throws IOException { List < Byte > binBook = createBinBook ( ) ; FileOutputStream out = new FileOutputStream ( "../src/book.bin" ) ; int bookLen = binBook . size ( ) ; byte [ ] binBookA = new byte [ bookLen ] ; for ( int i = 0 ; i < bookLen ; i ++ ) binBookA [ i ] = binBook . get ( i ) ; out . write ( binBookA ) ; out . close ( ) ; }
target:  Creates the book.bin file. 