Re: Question on binary files

From:
ram@zedat.fu-berlin.de (Stefan Ram)
Newsgroups:
comp.lang.java.help
Date:
26 Aug 2008 20:48:03 GMT
Message-ID:
<BitSet-20080826224710@ram.dialup.fu-berlin.de>
"Tom A." <meteoricshipyards@yahoo.com> writes:

In Pascal, it was easy to write this thing out to a file :
write(datastructure) and all 10 words (100 or so fields), were
written out.


  To write a serializable object to a file (path):

public static void save
( final java.lang.String path,
  final java.lang.Object object )
{ try
  { final java.io.FileOutputStream fileOutputStream
    = new java.io.FileOutputStream( path );
    final java.io.ObjectOutputStream objectOutputStream
    = new java.io.ObjectOutputStream( fileOutputStream );
    objectOutputStream.writeObject( object );
    objectOutputStream.close(); }
  catch( final java.io.IOException iOException )
  { iOException.printStackTrace(); }}

But I was wondering how Java programs do this sort of thing.


  I am not sure what you want to do.

  There is a serializable bit set in Java:

http://download.java.net/jdk7/docs/api/java/util/BitSet.html

  So you could allocate one of the size required and
  then use the above method to save it to a file.

  The size of a bit set object in memory depends on its size and
  on its implementation.

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