Java Class Library and JVM -

I'm a bit confused about JVM architecture. Can we say that Java Class Libraries JCL Java virtual machine JVM ?

Java virtual machine is an abstract computing machine ... [Joe] Java programming language Do not know anything about

JCL is required to implement Java language.

So you can use JVM to implement any of your selections and you can run Java program on any suitable architecture. For example, Android can run programs written in Java on Android Runtime (ART).