Practical compiler construction with java and the jvm

Though "Java compiler is often called the JVM compiler (for Java Virtual Machine)" might be misleading, it still holds because javac essentially converts Java source code to byte code for JVM to be run which then interprets it to machine readable instruction depending on the platform As javac is a compiler for JVM, it is not a part of it.

JVM introduced multiple arguments to manipulate compilers C1 & C2, one of them is “CICompilerCount” which allows you to allocate threads for compilers C1 & C2. 1/3 of the threads will be allocated to C1 and the rest will be allocated for C2.

Immersing students in Java and the Java Virtual Machine (JVM), Introduction to Compiler Construction in a Java World enables a deep understanding of the Java programming language and its implementation.
The text focuses on design, organization, and testing, helping students learn good software engineering skills and become better programmers.

The JVM is a little more complex than other run-times because it needs to allow more than just Java programs to run.
The JVM is used to create the runtime environment for both running Java programs (and the JRE, which is the Java runtime environment) and for running compiled code.