On Sep 1, 2004, at 6:25 AM, theUser BL wrote:
But how hard is it, to reimplement the plantform-dependent parts (the JVM and .so/.dll libs) as OpenSource and using the platform-independent parts (Java-Classes) from Sun ?
Quite hard actually. First and foremost, you *can't* use Sun's java classes in an implementation of Java that you want to distribute under an Open Source license. Just because Sun lets you see (some) of the source code, doesn't make it Free Software... it is still owned and controlled by Sun. So we need projects like GNU Classpath which create compatible versions of that part of the Java platform under a Free Software license.
Secondly, creating a non-naive compiler/interpreter that executes Java binaries with acceptable performance is not a trivial task either. That's what all the projects you cited above have been working toward for some time now. As you observed, they have had some success, but they are not all the way there.
-wilhelm
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