v1.4.0

v1.4.0 - Modern Java & JVM Engineering Expansion

Overview

This release significantly expands Java engineering coverage with modern Java platform evolution, JVM internals, production troubleshooting, performance engineering, and concurrency modernization.

The repository now provides a structured learning path from Java fundamentals through modern Java features and advanced JVM troubleshooting concepts commonly used in backend engineering and technical interviews.

Major Additions

Modern Java Platform Coverage

Added comprehensive coverage for:

• JDK11
• JDK17
• JDK21

Topics include:

• HTTP Client API
• String API improvements
• Collection API improvements
• Files API improvements
• Records
• Sealed Classes
• Pattern Matching
• Switch Pattern Matching
• Virtual Threads
• Structured Concurrency

JVM Engineering Expansion

Added dedicated JVM engineering coverage:

• JVM Overview
• Heap vs Stack
• Class Loaders
• Metaspace vs PermGen
• Garbage Collection
• G1 GC
• ZGC
• JIT Compiler
• JVM Tuning

JVM Troubleshooting Track

Added production-focused troubleshooting content:

• GC Log Analysis
• Heap Dump Analysis
• Thread Dump Analysis
• Thread Dump vs Heap Dump
• Memory Analysis
• Memory Leak Investigation

Production Engineering Focus

Expanded coverage for:

• OutOfMemoryError troubleshooting
• High CPU investigation
• Deadlock analysis
• Memory leak detection
• JVM observability
• Performance optimization
• Production debugging workflows

Learning Path Improvements

Enhanced Java engineering roadmap with:

• Modern Java evolution path
• JVM troubleshooting workflow
• Performance engineering concepts
• Interview-focused preparation material
• Production-oriented examples and guidance

Repository Improvements

• Updated Java documentation structure
• Updated repository navigation
• Updated learning roadmap
• Expanded changelog coverage
• Improved TODO planning and consolidation
• Enhanced interview preparation coverage

Outcome

The Java section now provides a complete foundation covering:

• Core Java Engineering
• Modern Java Development
• JVM Internals
• Performance Engineering
• Production Troubleshooting
• Concurrency Engineering
• Senior Backend Interview Preparation

v1.3.0

Core Java knowledge consolidation release.

Highlights:

• Functional Interfaces coverage
• Stream API enhancements
• SOLID principles module
• Practical Java examples migration
• Backend engineering considerations
• Repository organization improvements
• Learning platform consolidation

v1.2.0

Backend Engineering Foundation Expansion

Highlights

• Core Java foundation
• Collections foundation
• JVM foundation
• Multithreading foundation
• Security foundation
• Microservices foundation
• Testing foundation
• Database improvements
• Repository standardization
• Roadmap tracking improvements
• Repository quality and structure polish

Focus Areas

• Backend Engineering Fundamentals
• Production Engineering Concepts
• Scalable System Discussions
• Backend Interview Preparation

v1.1.0

Backend Engineering Java v1.1.0

Added

• Spring interview preparation structure
• Spring Core interview topics
• Spring Boot interview topics
• Spring Cloud interview topics
• Spring Security interview topics

Improved

• Spring ecosystem organization
• Documentation hierarchy
• Knowledge structure
• Interview preparation organization

Repository Areas

• Core Java
• Collections
• JVM
• Spring Ecosystem
• Database
• API Design
• Design Patterns
• Caching
• Messaging
• Security
• Microservices
• Performance
• Testing

Notes

Focused on improving maintainability, interview preparation material and backend engineering knowledge organization.

v1.0.0

Initial Foundation Release

Highlights

Backend Engineering Fundamentals

• Database Fundamentals
• API Design Concepts
• Messaging Foundation
• Performance Engineering Foundation

Repository Goals

• Backend engineering learning organization
• Interview preparation structure
• Production engineering discussions
• Scalable backend engineering concepts

Initial Scope

• Database concepts
• API design principles
• Messaging patterns
• Backend performance discussions

Foundation Focus

• Backend Engineering Fundamentals
• Production Engineering Basics
• Repository Structure Initialization

Release Notes

Initial repository foundation release establishing backend engineering knowledge organization and long term learning roadmap.