First Move (11~18) - Code, Learn, Build
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First Move (11~18) - Code, Learn, Build

Structured, level-based technology learning paths from foundational exploration to industry mastery.

Learning Domains

  • Python Programming (Active)
  • Computer Science Core
  • Web Development
  • AI & Machine Learning

Platform Architecture

  • Level-Based Progression
  • Decoupled Content Schema
  • Modular Code Execution Engine
  • Curated Official Resources

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Readability & Accessibility First

← Java Enterprise Development|Level 1: Java Syntax & Object-Oriented Principles

2. JVM Internals, JDK vs JRE & ClassLoader Subsystem

Lesson 2 of 25
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JVM Internals, JDK vs JRE & ClassLoader Subsystem

Deep dive into JVM Architecture: Loading, Linking, Initialization, ClassLoader hierarchy, and Bytecode execution.

JVM Internal Architecture Subsystems

### The Three Core Subsystems of JVM 1. **ClassLoader Subsystem**: Responsible for Loading (`.class` bytecode retrieval), Linking (Verification, Preparation, Resolution), and Initialization. 2. **Runtime Data Areas**: Memory zones split into Method Area/Metaspace, Heap, Java Threads Stacks, PC Registers, and Native Method Stacks. 3. **Execution Engine**: Executes bytecode via Interpreter, JIT Compiler (C1/C2), and Garbage Collector.

📚 Documentation & References:

  • JVM Specification (Oracle Docs)
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