[talk] JVM Questions

[Mark Saad]

> On Mar 19, 2014, at 4:23 PM, "Isaac (.ike) Levy" <ike at blackskyresearch.net> wrote:
> 
> 
> Hi All,
> 
> A Java question, for my own sanity.
> 
> Some folks I know are convinced that Oracle JDK and OpenJDK are identical.
> (OpenJDK is our Production standard for many reasons, yet follks keep using to Oracle JDK for dev...)
> 
> QUESTIONS:
> 
> Do folks here know anywhere I can find some practical code examples which expose the nasty bugs which can be encountered?
> 

So openjdk 7 is the reference implementation of the version 7 of the java spec . Iirc there is no single place for this only bug reports on how open behaves poorly compared to the reference . 
 
> Do folks here have any such examples, perhaps from your fine Java colleagues? (unsigned/signed int mania differences in particular)?
> 

There are lots if bullshit reports that mistakenly point to openjdk6 issues . Openjdk6 is not the same as openjdk7 . 6 was made by taking 7 and hacking in the old spec . It breaks in weird ways . Forget it exists .


> In the vast and disparate world of Java, is there another good place where I should ask to find examples of this stuff?
> 
> I'm dying to get my hands on some code to demonstrate the JVM implementation differences, so we can quit focusing on high level language spec discussions.
> 

The java test kit that the FreeBSD foundation used to certify the diablo jkd as compliant , would be a good staring point .


> Rocket-
> .ike
> 
> 
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---
Mark saad | mark.saad at longcount.org