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Re: Some same exceptions used in a given file

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Patricia Shanahan <pats@acm.org> writes:

> On 4/23/2011 10:08 AM, Merciadri Luca wrote:
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>>
>> Hi,
>>
>> In some of my code files, I've got the following catch block
>>
>> ==
>>          catch (IOException cantOpenFile)
>>              {
>>                  System.err.println("Can't open " + inputFilename + ".");
>>                  System.exit(1);
>>              }
>> ==
>> more than once, but at different places in the file. Is it possible to
>> define this somewhere so that I can directly catch the exception with
>> the two given commands? (Just as one would define his own exception.)
>
> I can see two options for reducing the amount of duplicate code:
>
> 1. Put the try-catch for IOException at a high enough level in the call
> hierarchy, and wide enough scope, that it will catch all instances of
> IOException for which you want the same handling.
>
> 2. Extract the handling for IOException into a method that can be called
> from multiple catch blocks.

And what is the difference between try and catch at a high enough
level and the same, but with a throw in the method that might generate
an exception?

- -- 
Merciadri Luca
See http://www.student.montefiore.ulg.ac.be/~merciadri/
- -- 

It takes two to tango.
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Some same exceptions used in a given file Merciadri Luca <Luca.Merciadri@student.ulg.ac.be> - 2011-04-23 19:08 +0200
  Re: Some same exceptions used in a given file Eric Sosman <esosman@ieee-dot-org.invalid> - 2011-04-23 14:40 -0400
    Re: Some same exceptions used in a given file Eric Sosman <esosman@ieee-dot-org.invalid> - 2011-04-23 16:23 -0400
    Re: Some same exceptions used in a given file Arved Sandstrom <asandstrom3minus1@eastlink.ca> - 2011-04-23 17:23 -0300
    Re: Some same exceptions used in a given file Merciadri Luca <Luca.Merciadri@student.ulg.ac.be> - 2011-04-24 00:00 +0200
      Re: Some same exceptions used in a given file Lew <noone@lewscanon.com> - 2011-04-23 18:22 -0400
      Re: Some same exceptions used in a given file Eric Sosman <esosman@ieee-dot-org.invalid> - 2011-04-23 18:31 -0400
        Re: Some same exceptions used in a given file Merciadri Luca <Luca.Merciadri@student.ulg.ac.be> - 2011-04-24 01:20 +0200
          Re: Some same exceptions used in a given file Lew <noone@lewscanon.com> - 2011-04-23 20:19 -0400
      Re: Some same exceptions used in a given file Arved Sandstrom <asandstrom3minus1@eastlink.ca> - 2011-04-23 22:25 -0300
        Re: Some same exceptions used in a given file Merciadri Luca <Luca.Merciadri@student.ulg.ac.be> - 2011-04-24 09:24 +0200
  Re: Some same exceptions used in a given file Patricia Shanahan <pats@acm.org> - 2011-04-23 13:48 -0700
    Re: Some same exceptions used in a given file Merciadri Luca <Luca.Merciadri@student.ulg.ac.be> - 2011-04-24 09:34 +0200
      Re: Some same exceptions used in a given file Lew <noone@lewscanon.com> - 2011-04-24 09:40 -0400
      Re: Some same exceptions used in a given file Patricia Shanahan <pats@acm.org> - 2011-04-24 06:53 -0700
  Re: Some same exceptions used in a given file Merciadri Luca <Luca.Merciadri@student.ulg.ac.be> - 2011-04-24 01:28 +0200

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