Graal

From APIDesign

Graal is an alternative version of the HotSpot VM compiler. Instead of HotSpot C2 - aka server compiler, which is written in C and C++, Graal is written in Java. This makes the code generation more approachable to Java programmers (at least on universities) and as such there is likely to be more progress on Graal than there ever was on HotSpot.