Re: catching exceptions in a catch block

From:
Daniel Pitts <newsgroup.spamfilter@virtualinfinity.net>
Newsgroups:
comp.lang.java.programmer
Date:
Tue, 09 Jun 2009 14:47:47 -0700
Message-ID:
<aMAXl.11825$GD4.5987@newsfe15.iad>
crazy fo sheezy wrote:

Hi. I have this piece of code here:

try {
....
} catch (Exception e) {
PrintWriter pw = new PrintWriter(new BufferedWriter(new FileWriter("c:\
\foo.log")));
e.printStackTrace(pw);
pw.close();
}

The problem I'm having is that the code in the catch block could throw
an IOException, FileNotFound for example. I want to be able to log
all errors in a log file. So, my first thought was to try to wrap
everything in the catch block within its own try/catch. But then,
since I want to log all errors to a log file, I'll need to instantiate
another PrintWriter in the second catch block (see below). If I keep
going, then I just end up with a bunch nested try/catches with no end
in sight.

try {
....
} catch (Exception e) {
try {
PrintWriter pw = new PrintWriter(new BufferedWriter(new FileWriter("c:\
\foo.log")));
e.printStackTrace(pw);
pw.close();
} catch (IOException e) {
//another PrintWriter????
}
}

I'm pretty sure this is the wrong way to accomplish what I want to
do. Could someone help? Thanks

Try not to reinvent the logging wheel. look at log4j, commons-logging
or even Java Logging (in that order).

--
Daniel Pitts' Tech Blog: <http://virtualinfinity.net/wordpress/>

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