Regis wrote:
galaxy wrote:
Thanks Regis
2009/6/25 Regis <xu.re...@gmail.com>
galaxy wrote:
Hi ,
I have several questions about the classlib .
1)
I noticed that the module suncompat isn't in the jre list of jar
files
of harmony and also the lines of suncompat in
bootclasspath.properties has
been commented
so I am wondering the function of this module ?Is it the same of
xxx-stubs.jar ?
suncompat provides some Sun internal classes that are widely used by
applications. I guess these classes just delegate functions to Harmony
classes which has equivalent functions.
One more thing I don't understand .It's the sun.misc.Unsafe class .It is
included in both the kernel.jar
and suncompat.jar .So is this the reason not including it in the boot
class
path ?
kernel.jar should be in the first place of bootstrap classpath,
sun.misc.Unsafe in suncompat.jar would never be used even if
uncommented in bootclasspath.properties.
I don't know why it is not including in boot classpath (it's a long
time ago story). Maybe people think its existence just for compatible
reasons, Harmony can work well without it. If someone used Sun
specific APIs and didn't willing to change, he could just add
suncompat.jar to make his program work.
I think it was an intentional choice to not put it on the boot classpath
by default because we don't want users to develop code relying on
classes outside of the spec. So while we provide the suncompat.jar to
get applications working which already rely on those classes, we
encourage developers of new code to stick to spec'ed API by not making
them available by default.
Regards,
Oliver
luni-kernel-stubs.jar is just stub classes to make compiler happy, the
"real" classes are provided by vm.
2)
I noticed that there are several modules like yoko , asm ,and so on
,unlike others ,they are in folders .And some of them the manifest
file
doesn't have the export / import
statement including yoko , yoko-core , yoko.rim , yoko-rmi-impl ,
becl.-5.2
.So how are they related to the other modules in the jre ? I have
searched
several packages of them and found no relation between them and
the other
jre modules .
As I know, yoko is rmi provider, asm is used by pack200 module.
Could anyone explain this to me :)
Thanks !
--
Best Regards,
Regis.
--
Oliver Deakin
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