Re: Itchy problem

From:

Tom Hawtin <usenet@tackline.plus.com>

Newsgroups:

comp.lang.java.help

Date:

Wed, 09 May 2007 22:52:58 +0100

Message-ID:

<46424236$0$8749$ed2619ec@ptn-nntp-reader02.plus.net>

Ravi wrote:

                FileOutputStream f;
                try {
                        f = new FileOutputStream("test");
                } catch (FileNotFoundException fe) {
                        System.out.println(fe);
                        System.exit(1);

The direct solution is to make sure this catch block never exits
normally. Add (or better replace with) -

throw new Error(fe);

}
}

Even so, you are not guaranteed to close FileOutputStream. In real
programs this may cause a problem.

A better way to write the program is:

import java.io.*;

class DataIO {
     public static void main(String[] args) {
         try {
             final FileOutputStream fileOut =
                 new FileOutputStream("test");
             try {
                 DataOutputStream out = new DataOutputStream(f);
                 out.writeDouble(7.6d);
                 out.writeFloat(90.9f);
                 out.writeChars("Ravi");
                 out.flush();
             } finally {
                 fileOut.close();
             }
         } catch (FileNotFoundException exc) {
             System.out.println(exc);
             System.exit(1);
             throw new Error(exc);
         } catch (IOException exc) {
             System.out.println(exc);
             System.exit(2);
             throw new Error(exc);
         }
     }
}

Tom Hawtin