No need for Xerces jars since Sun includes it in the jvm?

Hey Everybody,
If one would like to use Xerces in a java app, why should they download it from Apache when it's included in Sun's jvm releases as of 1.4?
I noticed that the "rt.jar" in Sun's jvm for Windows contains an apache folder: jdk1.6.0_11\jre\lib\rt.jar\com\sun\org\apache\,
that contains the following apache folders: bcel, regexp, xalan, xerces, xml, xpath
How does one tell what version of Xerces is being released with a particular Sun jvm release? I looked all over the Sun site - it seems they haven't documented that they are using files from Xerces. They even took the trouble of burying the "org/apache" folder down under the "com/sun" folder -- as if to hide the fact that apache is being used....maybe to take credit for it to make it look like the functionality was developed by Sun?
Is there a chance that one could successfully compile java code that has references to Xerces classes where the developer's project does not contain Xerces jars, but instead relies on the Sun bundled xerces classes -- and while that code would compile file, there could exist runtime exceptions due to potential classes from Xerces that Sun did not include in its jvm -- while if the project did include the Xerces jars - there would be no runtime errors?
Thanks!

EnNuages wrote:
Hey Everybody,
If one would like to use Xerces in a java app, why should they download it from Apache when it's included in Sun's jvm releases as of 1.4?One reason could be because the apache one is newer and thus is better in some way.
>
I noticed that the "rt.jar" in Sun's jvm for Windows contains an apache folder: jdk1.6.0_11\jre\lib\rt.jar\com\sun\org\apache\,
that contains the following apache folders: bcel, regexp, xalan, xerces, xml, xpath
How does one tell what version of Xerces is being released with a particular Sun jvm release? I looked all over the Sun site - it seems they haven't documented that they are using files from Xerces. They even took the trouble of burying the "org/apache" folder down under the "com/sun" folder -- as if to hide the fact that apache is being used....maybe to take credit for it to make it look like the functionality was developed by Sun?
No.
More likely the choice of location was without thought. Or because they might want to change it or remove it.
Is there a chance that one could successfully compile java code that has references to Xerces classes where the developer's project does not contain Xerces jars, but instead relies on the Sun bundled xerces classes -- and while that code would compile file, there could exist runtime exceptions due to potential classes from Xerces that Sun did not include in its jvm -- while if the project did include the Xerces jars - there would be no runtime errors?No. You can't compile using classes that don't exist.

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