; Date: Thu Feb 09 2006
Let me give y'all an interesting hint on entering the regression contest ... Suppose your application has a unit-test suite ... Simply run your test suite on a Tiger build (1.5 update 6 is the latest) and then on a Mustang build ( JDK 6 build 70 is the latest) and compare the results.
If every test gives the same result on each then that's wonderful. But if some test gives a different result on Mustang than on Tiger, it's time to roll up your sleeves. Does it show a bug in your application? Or does it show a bug in Java?
If you're satisfied it shows a bug in Java, you've probably found a regression. Again, regressions occur when functionality which used to work in a previous release is broken in a later release. WE WANT TO KNOW ABOUT REGRESSIONS, because we want to fix them before making the final Mustang release.
There's more information about the contest here including a link to tne entry page.
Uh .. Mustang is certainly not Java, per se. It's just the RI for J2SE 6. cheers, dalibor topic
Posted by: robilad on February 09, 2006 at 05:32 PM
I ran into a source-only regression this afternoon. The problem was that the class had some wildcard imports for stuff like JTable and our custom SwingWorker. When I upgraded to Java 6, the code wouldn't compile because there was a conflict between our SwingWorker and the new
javax.swing.SwingWorker. This isn't a breaking regression, but its annoying!
Posted by: jessewilson on February 09, 2006 at 06:44 PM
I cannot enter the contest until someone on the mustang team actually looks up what the word regression really means, and then picks a more rational name for the contest. ;-)
Posted by: cajo on February 09, 2006 at 11:06 PM
Uh... What we mean by regression is, I think, pretty well captured by one of the definitions you linked to: Relapse to a less perfect or developed state
The word regression is widely used within Sun, and I think other software organizations, to mean functionality which used to work, and doesn't work today. Or, a relapse to a less perfect (more buggy) state.
Posted by: robogeek on February 10, 2006 at 10:36 AM
Where can i get the "Java Cryptography Extension (JCE) Unlimited Strength Jurisdiction Policy" Files from?
Posted by: dims on February 11, 2006 at 08:36 PM
existing applications are an excellent test, their like giant test suites. I saw something break in my app when I ran it in java 6 but haven't gotten around to seeing why the heck its busted. It may be a jython problem, it may be an API inconsistency. Time will tell. leouser
Posted by: leouser on February 12, 2006 at 12:59 PM
Some material on software engineering that I have defines 'regression testing' as the retesting that becomes mandatory when changes has been made to code that has been tested thoroughly.
Posted by: ovisvana on February 12, 2006 at 10:39 PM