Thanks Kirk.

I was referring to the samples. At the time I looked, I could not find any 
sample classes compiled with 64 bit java.
I know that you can write your own code and run it with the 64 bit launcher, 
but I wanted to run the sample code.
And there was no source code for the dlls used by the samples so that they 
could be recompiled.
I will look again.


-----Original Message-----
From: IBM Mainframe Discussion List [mailto:[email protected]] On Behalf 
Of Kirk Wolf
Sent: Friday, January 11, 2019 12:22 PM
To: [email protected]
Subject: Re: Do I need to copy a mainframe flat file to OMVS, before I access 
the data from a JAVA program? - JZOS question

Another point of common confusion wrt JZOS:

"JZOS" is really two separate things:

- The "JZOS batch launcher", for starting the Java JVM conveniently in batch

- The "JZOS Toolkit" class library, which has Java classes and native code for 
accessing z/OS services and facilities.
   For example:  classes for doing dataset I/O.

You don't have to use the launcher in order to use the JZOS Toolkit class 
library, and vice versa.

On Fri, Jan 11, 2019 at 11:16 AM Kirk Wolf <[email protected]> wrote:

> Eileen,
>
> I'm not exactly sure I understand what you mean.
> JZOS has been included in the 64-bit SDKs for more than a dozen years.
>
> - The JZOS toolkit java classes  (ibmjzos.jar), are java byte codes.
> There is no such thing as compiling these with a 31-bit vs 64-bit sdk.
> - The JZOS tookit JNI code dlls are part of the z/OS Java SDK.   The
> 64-bit SDK has 64-bit versions of these dlls.
>
> The "ZipDatasets" is part of the *samples* for JZOS, not the JZOS 
> product itself (which is included in the SDK), but separately downloadable.
> See for example:
> https://www.ibm.com/support/knowledgecenter/en/SSYKE2_7.0.0/com.ibm.ja
> va.zsecurity.70.doc/zsecurity-component/jzos.html
>
> Kirk Wolf
> Dovetailed Technologies
> http://dovetail.com
>
> On Fri, Jan 11, 2019 at 11:01 AM Barkow, Eileen 
> <[email protected]>
> wrote:
>
>> Re  JZOS:
>>
>> The last time I looked at JZOS , about 2 years ago, there were no 
>> supplied classes for 64 bit java, only 31 bit.
>> JZOS itself had a 64 bit option to run the batch launcher,   but no
>> classes that I could find, like those for the MVS datasets or my 
>> favorite one for ZipDataSets.
>> And the documentation consisted of a README file from IBM that 
>> pointed to a bogus, non-existent web site.
>>
>> Before I try JZOS again, is it supplying classes compiled with 64 bit 
>> java or not?
>>
>>
>> -----Original Message-----
>> From: IBM Mainframe Discussion List [mailto:[email protected]] 
>> On Behalf Of Jantje.
>> Sent: Friday, January 11, 2019 7:05 AM
>> To: [email protected]
>> Subject: Re: Do I need to copy a mainframe flat file to OMVS, before 
>> I access the data from a JAVA program?
>>
>> On Thu, 10 Jan 2019 18:11:47 -0500, Cameron Conacher 
>> <[email protected]>
>> wrote:
>>
>> >Thanks everyone.
>> >Looks like I have some reading to do :-)
>>
>> Yes. And while you are at it, do have a look at the excellent jZos 
>> stuff originally from Dovetailed, but now included in the JVM. It has 
>> (amongst many other goodies) a ZFile class.
>>
>> Cheers,
>>
>> Jantje.
>>
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