The java.base module also exports packages to other modules, such as java.lang, which contains core classes like Object and String. These packages are then loaded by the bootstrap class loader.

This API, part of the java.lang.foreign package, consists of a few core classes: Linker: This interface provides mechanisms to link Java code with foreign functions in libraries that conform to a ...

The java.lang package in the 64-bit JDK 9-ea+154 release that I’m using for this series includes a package-private StackFrameInfo class that implements StackFrame.