On Wed, 03 Oct 2012 14:14:15 +0200, Reinier Zwitserloot
<[email protected]> wrote:
not work at all (assert keyword). As far as I know, Java 8 will be no
different!
Let's first reset the discussion and have a check on a piece of
information of mine that I'm probably getting wrong. I'm still assuming
Java 8 will do generics reification. Is this right?
* All javacs, from 1.1 to 1.7, DO NOT emit bytecode which is capable of
running on a JVM associated with a previous version. In this sense javac8
There's something I don't understand here. I can use JDK 6 (I suppose JDK
7, not tried yet) to generate code for Android, which is Java 5. Just a
matter of --source --target, right?
will not be 'backwards compatible' but then **NO JAVAC EVER** can make
that
claim. You can use -target X to change this, but you can't mix -source Y
and -target X where Y exceeds X, and this has been true for as far as I
know all javacs.
Let's define my concept of backward-compatible in this scenario. I'm a
corporate, I have a large codebase in Java 6 (for instance). My upgrade to
JAva 7 will be incremental and made by a path such as:
1. I move to JDK 7 with --source --target 6 and check whether it runs on
JDK 6. Eventually I fix things so this happens.
2. Then I check whether the thing runs on JDK 7. Eventually I fix things
so this happens. At this point I'm mostly happy, since the biggest trouble
with Java 6 is when it goes EOL. Now I'm on a runtime that is still
getting patches.
3. I now move to --source --target 7. Eventually I fix things so this
happens.
4. At this point, I can incrementally start using features of Java 7.
"Fix things so this happens" admits that I have some work to do, if this
work is very well confined I still call it (practical) backward
compatibility of a new JDK. Perhaps I'm using the wrong term?
--
Fabrizio Giudici - Java Architect @ Tidalwave s.a.s.
"We make Java work. Everywhere."
http://tidalwave.it/fabrizio/blog - [email protected]
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