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From: Jeff Higgins <jeff@invalid.invalid>
Newsgroups: comp.lang.java.programmer
Subject: Re: using two different versions of JAR files
Date: Thu, 26 Mar 2015 20:00:59 -0400
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On 03/26/2015 07:53 PM, Jeff Higgins wrote:
> On 03/26/2015 07:05 PM, Jeff Higgins wrote:
>> On 03/26/2015 09:18 AM, John wrote:
>>> On Wednesday, March 25, 2015 at 7:31:33 PM UTC-4, Jeff Higgins wrote:
>>>> On 03/25/2015 03:27 PM, John wrote:
>>>>> Hi:
>>>>>
>>>>> Our JAVA programs are running as plugins inside a framework from a
>>>>> company called "ABC". They use a JAR suppose called "xyz-1.0.3.jar".
>>>>>
>>>>> Our JAVA programs need to use newer version, xyz-1.0.5.jar, because
>>>>> we found some bug inside xyz-1.0.3.jar
>>>>>
>>>>> The company "ABC" won't upgrade their JARS.
>>>>>
>>>>> In our code, when loading com.opq.rst.Hello.class, how can we make
>>>>> sure it is not loaded from xyz-1.0.3.jar and it is loaded from
>>>>> xyz-1.0.9.jar?
>
> In your code test for the presence of the bug.
> If found you are using the buggy jar.
>
>>>>>
>>>>> Thank you very much.
>>>>>
>>>> <https://docs.oracle.com/javase/8/docs/technotes/guides/versioning/spec/versioning2.html>
>>>>
>>>>
>>>
>>> I have scanned through the document. I don't get any hints.
>>>
>> Huh. Did you get as far as:
>> <https://docs.oracle.com/javase/8/docs/technotes/guides/versioning/spec/versioning2.html#wp90779>
>>
>>
>> The crux of your problem seems to be your assertion:
>> "The company "ABC" won't upgrade their JARS."
>> Too bad.
>>
>
Well, it seems your entire upstream needs to get busy
in support of their downstream customers (you).