Retrieving the bytes of platform classes

Sundararajan Athijegannathan sundararajan.athijegannathan at oracle.com
Tue Oct 24 01:47:46 UTC 2017


A simple nashorn sample to extract single .class using jrt file system 
provider:

https://blogs.oracle.com/sundararajan/extracting-a-single-class-file-from-java9-platform-jimage-modules-file

-Sundar

On 23/10/17, 11:25 PM, Alan Bateman wrote:
> On 23/10/2017 18:48, Mark Raynsford wrote:
>> :
>>
>> In the olden days, we'd probably have gone rummaging in rt.jar, but
>> that was obviously a hack and wasn't future-proof. My tool is only
>> designed to work with JDK 9 and up.
>>
>> Note that I'm *not* asking to get from loaded Class<?> instances to
>> bytes: I'm analyzing classes statically and none of the analyzed
>> classes will actually be loaded by any ClassLoader.
>>
> Have you looked at the jrt file system provider? Details in JEP 261 [1].
>
> -Alan
>
> [1] http://openjdk.java.net/jeps/261


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