testing for a class having been loaded

[Alan Snyder]

By the way, I had no trouble finding examples on the web of using findLoadedClass() via reflection. I listed the first 11 below.

Obviously, this hack is known, of interest, and used.

I think it deserves to be an issue.

> As I said, this change will not be popular but please bear with it until the extent of the issues uncovered is more widely understood. We need all the help we can get to identify issues and get them reported (and hopefully fixed) by the libraries and tools with the technical debt (and we expect a lot of it will be technical debt). For those working on OpenJDK and the JDK 9 project then it's very possible that some of these issues will redirect to the JDK as requests for new APIs or hooks (and I assume will need to be looked at on a case-by-case basis).
> 
> Any help reporting issues to popular tools and libraries would be appreciated.



https://github.com/HotswapProjects/HotswapAgent/blob/master/hotswap-agent-core/src/main/java/org/hotswap/agent/util/classloader/ClassLoaderHelper.java

http://stackoverflow.com/questions/482633/in-java-is-it-possible-to-know-whether-a-class-has-already-been-loaded

http://stackoverflow.com/questions/12093271/how-do-i-determine-class-loading-order-when-i-inject-them-into-the-systemclasslo

https://dzone.com/articles/classloaderlocal-how-avoid

http://snacktrace.com/artifacts/net.bytebuddy/byte-buddy-dep/1.3.20/net.bytebuddy.dynamic.loading.ClassInjector

https://fossies.org/linux/yacy/source/net/yacy/document/parser/pdfParser.java

http://lists.jboss.org/pipermail/jboss-cvs-commits/2010-May/120099.html

https://devops.ands.org.au/browse/VT-BUILD-55/artifact/JOB1/Javadoc/src-html/au/org/ands/vocabs/toolkit/utils/ApplicationContextListener.html

http://visualvm.sourcearchive.com/documentation/1.2.1-0ubuntu1/ClassLoaderManager_8java-source.html

http://code.taobao.org/svn/QLExpress/trunk/src/main/java/com/ql/util/express/ExpressClassLoader.java

http://svn.rifers.org/rife/tags/release-1.4/src/framework/com/uwyn/rife/engine/EngineClassLoader.java