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Java Architecture

Java Architecture ka matlab hai wo layered system design jo Java platform ko define karti hai —…

Overview

Java Architecture — Quick Facts

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Property: Detail

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Subject: Java Platform Architecture

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Category: Programming Language Architecture…

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Core Principle: Write Once, Run Anywhere (WORA)

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Infobox

🏗️ | Property | Detail | |---|---| | Subject | Java Platform Architecture | | Category |…

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Kya Hai Java Architecture

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Source code = recipe (kisi bhi…

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Compiler (javac) = translator jo…

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Bytecode = standardized recipe…

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JVM = universal kitchen appliance…

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Kyun Zaroori Hai

🔧 | Reason | Explanation | |---|---| | Platform Independence | Architecture samajhne se…

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Big Picture — 3 Layers

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3 Layers Table

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JDK = everything (development +…

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JRE = runtime only (no compiler)

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JVM = execution engine only (core…

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Mermaid Diagram — Java Architecture Overview

📊 `mermaid flowchart TB subgraph JDK["JDK (Java Development Kit)"]…

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JDK Architecture

🌐 JDK = Complete development package — code likhne, compile karne, debug karne, aur run…

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JDK Components Table

🔗 | Component | Type | Purpose | |---|---|---| | javac | Compiler | .java source → .class…

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JRE Architecture

🏗️ JRE = Runtime environment — sirf programs run karne ke liye (development tools nahi):

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JRE Components Table

📐 | Component | Category | Purpose | |---|---|---| | JVM | Core | Bytecode execution engine…

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JVM Architecture (Deep Dive)

🔧 JVM = Java Architecture ka heart — ye wo virtual machine hai jo bytecode ko actual…

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JVM Components Table

⚙️ | Subsystem | Component | Purpose | |---|---|---| | ClassLoader Subsystem | Bootstrap…

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Mermaid Diagram — JVM Internal Architecture

🏛️ `mermaid flowchart TB subgraph ClassLoading["ClassLoader Subsystem"]…

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Class Loading Subsystem

📊 Class Loading = bytecode files (.class) ko memory me load karna:

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ClassLoader Types Table

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Security: Core Java classes…

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Uniqueness: Ek class sirf ek baar…

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Isolation: Different classloaders…

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Class Loading Process

🔗 | Phase | Step | Description | |---|---|---| | Loading | 1. Read | .class file ka…

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Runtime Data Areas (Memory)

🏗️ JVM ke andar 5 major memory areas hain:

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Memory Areas Table

📐 | Area | Shared/Per-Thread | Stores | Lifetime | Key Point | |---|---|---|---|---| |…

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Execution Engine

🔧 Execution Engine = bytecode ko actual execute karne wala component:

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Execution Engine Table

⚙️ | Component | Mechanism | Speed | When Used | |---|---|---|---| | Interpreter | Bytecode…

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JIT Compilation

🏛️ How JIT Works | Step | Action | Detail | |---|---|---| | 1 | Method execute hota hai…

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Garbage Collection

📊 GC = Automatic memory management — unused objects detect karke memory free karna:

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GC Algorithms Table

🌐 | GC Algorithm | Type | Best For | Pause Behavior | Default In | |---|---|---|---|---| |…

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Java Compilation Flow

🔗 Complete flow — source code se execution tak:

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Compilation Flow Table

🏗️ | Step | Component | Input | Output | Description | |---|---|---|---|---| | 1 | Developer…

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Bytecode

📐 What Is Bytecode Bytecode ek intermediate representation hai — ye na source code hai, na…

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Platform Independence

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Java code is platform-independent…

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JVM is platform-dependent — each…

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But developer ko OS-specific JVM…

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Java Security Architecture

⚙️ Java security multi-layered hai:

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Security Layers Table

🏛️ | Layer | Component | Protection Against | |---|---|---| | Language Level | No pointers,…

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Java Module System

📊 Java 9 me Project Jigsaw introduce hua — modular JDK: | Aspect | Detail | |---|---| |…

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Java Architecture vs Other Languages

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Architecture Comparison Table

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Performance Considerations

🏗️ | Factor | Impact | Optimization | |---|---|---| | JVM Warmup | First few requests slow…

Comparison

Architecture Comparison Table

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Compilation: Source → Bytecode → JIT →…

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Intermediate Code: .class bytecode

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VM/Runtime: JVM

Diagram

Visual Flow

📊 Diagram visualization — details in narration

Diagram

Visual Flow

📊 Diagram visualization — details in narration

Quiz — Question 1

Java Architecture ka sabse sahi definition kya hai?

Quick Quiz

Quiz — Question 2

Java Architecture ka 'Subject' kya hai?

Complete! 🎉

Java Architecture Complete!

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