What is JVM?

JVM (Java Virtual Machine) is an engine that provides a runtime environment in which java bytecode can be executed. It converts source code to bytecode and then it will execute your program.

What it does

• Loads code
• Verifies code
• Executes code
• Provides runtime environment

JVM Architecture

• ClassLoader -: Used for loading java class
• Method Area-: Used For storing class structures
• Heap-: To store Objects their related instance like variables, and arrays 
• JVM language Stacks-: Store only local variables
• PC Registers-: Used for storing the address of the Java virtual machine instruction
• Native Method Stacks-: it hold the instruction of native code
• Execution Engine-: This is software and used to test hardware to execute program
• Native Method interface-: Interface is a programming framework it allows your java to run in JVM
• Native Method Libraries-:  It contains collection of the Native Libraries

Let's see an example to print the classloader name 

public class JavaApplication {
    public static void main(String[] args) {

        Class c = JavaApplication.class;

        System.out.println(c.getClassLoader());
        System.out.println(String.class.getClassLoader());
    }

}

Output:

Thanks, May this will help you.