Description Victor Toni 2004-12-22 14:01:16 EST

Right now it's not officially supported (either by the JDT compiler or SUN) to
compile 1.5 code for 1.4 use (javac -source 1.5 -target jsr14)
However it works when tampering with property files.

There are multiple reasons to NOT support this:
 - code might have covariance
 - code might have annotations
 - code might have enums

Scenario when it will work:
 - code uses generics
 - code uses new "for" loop

Depends on case to case:
 - autobxing / unboxing

However most of these futures won't be used regulary.
From my experience (which doesn't mean much :-)  generics and the new "for" will
be the most used new features.

A lot of people have legacy support for older platforms, but would like to clear
up their code. This is not possible at the moment in a supported way, because
there is no official mode for compiling source=1.5 with class=1.4.

I would appreciate such a feature, which moves the complexity from the
user/programmer into the compiler and would save many hours.