What is the Regressions Challenge, who is eligible, and how do I enter?What is a regression?
A regression is a kind of compatibility bug, in which some software function works one way in an earlier version of the software, and works differently and incorrectly in a later version. The later version is said to have a regression. For the purpose of this contest a regression is a feature or function or behavior of J2SE 5.0, that works differently in Java SE 6. Regressions are seen by users and developers as failures of backward compatibility. If Java SE did not have regressions, applications would behave the same under newer versions of the platform, and costly re-qualification of applications on new versions would not be necessary, more fully protecting customer investments.
