How Java multi-threaded program is able to use multiple CPU cores?

Question

Could someone please provide explanation how Java multi-threaded program (e.g. Tomcat servlet container) is able to use all cores of CPU when JVM is only single process on l

Answer 1

The JVM is a single process with many threads. Each thread can be scheduled on a different CPU core. A single process can have many threads.

When Java software running inside the JVM asks for another thread the JVM starts another thread.

That is how the JVM manages to use multiple cores.