How does the loading and execution of Java code occur in the JVM?

Loading and executing Java code in the JVM occurs in several stages:

1. Loading bytecode: The Java program is compiled into bytecode (.class files), which is loaded into the JVM using a class loader (ClassLoader).

2. Verifying bytecode: The JVM checks the correctness and security of the loaded bytecode.

3. Preparation and resolution: The JVM prepares classes by allocating memory for static variables and resolving symbolic references.

4. Initialization: Static initialization blocks are executed, and static variables are initialized.

5. Execution: The JVM interprets the bytecode or compiles it into machine code using a JIT compiler for execution on a specific platform.

Example: When running java MyApp, the JVM loads MyApp.class, verifies it, and executes its main method.