Bootstrapping java and python compilers

Question

The wikipedia page on compiler bootstrapping lists python and java among the languages whose compilers are bootstrapped. Aren't javac and cpython implemented in c? Why are these languages listed on that page?

Answer 1

javac is written in Java, and compiles Java source to bytecode. The source is available online. So javac was bootstrapped. You may be confusing javac with the JVM as the latter is written in C and is used to compile bytecode to machine code and run it.

Same thing for Python. The compiler is not the same thing as the execution environment.