In which language are the Java compiler and JVM written?

Question

In which languages are the Java compiler (javac), the virtual machine (JVM) and the java starter written?

Answer 1

Supposing you're talking about the Hotspot JVM, which is iirc provided by Sun, it is written in C++. For more info on the various virtual machines for Java, you can check this link. javac, like most Java compilers, is written in Java.