Not quite; Hotspot (Sun/Oracle JVM) and Android Runtime are both C++; the major C/C++ implementations (GCC, LLVM/Clang, MSVC, Intel C++ Compiler) are all C++ to

Not quite; Hotspot (Sun/Oracle JVM) and Android Runtime are both C++; the major C/C++ implementations (GCC, LLVM/Clang, MSVC, Intel C++ Compiler) are all C++ too, although GCC was C until 2010 and MSVC's 16-bit ancestors were as well.