try-with-resources and null resource (original) (raw)
Joe Darcy joe.darcy at oracle.com
Mon Jan 31 16:00:37 PST 2011
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Vimil Saju wrote:
--- On Mon, 1/31/11, Rémi Forax <forax at univ-mlv.fr> wrote:
From: Rémi Forax <forax at univ-mlv.fr> Subject: Re: try-with-resources and null resource To: coin-dev at openjdk.java.net Date: Monday, January 31, 2011, 12:30 PM On 01/31/2011 08:51 PM, Vimil Saju wrote:
The following code pattern is present at many places in our code base. List records = new ArrayList(); ResultSet rs = null; try { rs = executeQuery(st); records = fetchRecords(rs, returnClass); } catch(Exception ex) { logDBError(ex); throw new DBException(ErrorCodes.DBFETCHERROR, ex); } finally { freeUp(rs); } return records; How would the about code look like with the new try-with-resources syntax? I suppose that freeUp(rs) is equivalent to rs.close(). try(ResultSet rs = executeQuery(st)) { return fetchRecords(rs, List.class); } catch(Exception ex) { logDBError(ex); throw new DBException(ErrorCodes.DBFETCHERROR, ex); } That looks good, I was a bit worried that a catch block couldn't be attached to the new try-with-resources construct
Since last July [1], JDK 7 builds with an implementation of try-with-resources have been available to download and people were invited to use that feature in particular and send in feedback.
-Joe
[1] "Project Coin ARM Implementation," http://blogs.sun.com/darcy/entry/project_coin_arm_implementation
[2] "Project Coin: Try out try-with-resources", http://blogs.sun.com/darcy/entry/project_coin_try_out_try
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