java.lang.reflect.InaccessibleObjectException: Unable to make field volatile java.lang.Object java.util.concurrent.CompletableFuture.result accessible: module java.base does not \"opens ...

The Java volatile keyword is used to mark a Java variable as "being stored in main memory". More precisely that means, that every read of a volatile variable will be read from the computer's main ...

If you need to control access to certain pieces of data in a class when writing multithreaded applications, see how you can use the volatile keyword to get a similar effect as using the synchronized ...