What is JVM architecture and how does it work?

What is JVM architecture and how does it work?

JVM, or Java Virtual Machine, is an engine that provides a runtime environment to execute Java bytecode. It converts bytecode into machine code, allowing Java programs to run on any device that has a JVM installed.

What are the main components of JVM?

The main components of JVM include the Class Loader, Execution Engine, Java Native Interface (JNI), and the Java Memory Model.

Can you explain the role of the Class Loader?

The Class Loader is responsible for loading class files into the JVM. It verifies, links, and initializes classes before they can be executed.

How does the Execution Engine work?

The Execution Engine executes the bytecode. It can use either an interpreter, which executes code line by line, or a Just-In-Time (JIT) compiler, which compiles bytecode into native machine code for better performance.

What is the Java Memory Model?

The Java Memory Model defines how threads interact through memory and what behaviors are allowed in concurrent programming. It ensures visibility and ordering of variable access.