ClassLoader::getPlatformResource*() methods

Alan Bateman Alan.Bateman at
Wed Aug 31 11:12:32 UTC 2016

On 31/08/2016 11:33, Richard Opalka wrote:

> Hi Jigsaw Team,
> There's new ClassLoader::getPlatformClassLoader() method introduced 
> with project Jigsaw.
> There are three ClassLoader::getSystemResource*() methods available
> that fallback to BootLoader if SystemClassLoader is not available.
> Shouldn't ClassLoader::getPlatformResource*() methods be defined as well
> providing similar fallback mechanism?
ClassLoader.getSystemClassLoader() should never return null. I see we 
have a few residual places that still check for null so some clean-up 
needed. The @return description also needs clean-up.

So I'm curious if you have a scenario where there is no system class 
loader. Is this instrumentation early in the startup or something 
reading a private field, again during early startup, rather than calling 
the getSystemClassLoader method?

As regards the platform class loader then 
ClassLoader.getPlatformClassLoader().getResourceXXX should be the 
equivalent of introducing new methods so it hardly seems worth it.


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