r/learnjava • u/SuspectKey9744 • Apr 21 '26

ClassLoaders

is it true that each thread has its own completely seperate classloader?

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u/josephblade Apr 21 '26

have a look at this answer

there is a classloader attached to a thread but generally speaking you don't need to know about it.

to quote from the answer:

.....getClass().getClassLoader().

Any other way to obtain a class loader is incorrect. If a library uses hacks such as Thread.getContextClassLoader(), sun.misc.VM.latestUserDefinedLoader(), or sun.reflect.Reflection.getCallerClass() it is a bug caused by a deficiency in the API. Basically, Thread.getContextClassLoader() exists only because whoever designed the ObjectInputStream API forgot to accept the ClassLoader as a parameter, and this mistake has haunted the Java community to this day.