Re: saving as a .dat file

From:

"Rhino" <no.offline.contact.please@nospam.com>

Newsgroups:

comp.lang.java.help

Date:

Tue, 21 Nov 2006 13:51:39 -0500

Message-ID:

<ejvhqj$lih$1@news.datemas.de>

"porky008" <porky008@charter.net> wrote in message
news:1164131197.237043.101450@b28g2000cwb.googlegroups.com...

ab wrote:

You just want to iterate through your java.util.List<DVD> dvds = new
java.util.ArrayList<DVD>();

output 'all' your dvd variables into your .dat on one line separated by
a comma, so when you read a line you split it by comma giving you array
of your data items.

initialise your .dat file
for (DVD dvd : dvds) {
output dvd.title + ","
output dvd.genre + ","
etc.
output "\n" //new line
}

read .dat
BufferedReader reader = new BufferedReader( new FileReader( ".dat file"
) );
String str = null;
while ( ( str = reader.readLine( ) ) != null ) {
yourarray = str.split(",")

DVD newDvd = new DVD( yourarray[0], yourarray[1], yourarray[2] etc)
dvds.add(newDvd)
}

this is a simple way of doing what your after. You should really start
learning how to output your data as xml format.

I got it this far but it is saying illegal escape character. Can I get
some help on this please?

Try doubling the backslashes in the definition of 'File':

     btnSave.addActionListener(new ActionListener(){
         public void actionPerformed(ActionEvent ae){

       try
       {
         File file = new File("C:\data\inventory.dat ");

File file = new File ("C:\\data\\inventory.dat");

         PrintWriter out = new PrintWriter(new BufferedWriter(new
FileWriter(file)));
         out.println(dvds);
         out.println("another line");
         out.println(dvd);
         out.close();
       }
       catch(IOException ioe){ioe.printStackTrace();}
       }
   });

This is an untested suggestion and you may find other problems as soon as
you resolve that one.

--
Rhino