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Java

String
Arrays
Scanner
Wrapper Classes & Autoboxing
File Reading
File Writing
Enum
Record
Reflection
Date & Time API

Introduction to Exceptions
Try-Catch and Finally
Exception Hierarchy
Checked vs Unchecked Exceptions
Throw and Throws
Creating and Throwing Custom Exceptions
Exception Handling Best Practices

Introduction to Generics
Generic Methods
Bounded Type Parameters
Wildcards
Generics with Collections
Type Erasure and Generic Limitations

if / else
switch
for Loop
Enhanced for Loop
while & do-while Loops
Nested Loops

Lists
Sets
Maps
Queues & Collections Utility

Interface
Abstract Class
Inheritance
Polymorphism

Threads

Lambda Expressions
Built-in Functional Interfaces
Stream API Fundamentals
Terminal Operations
Collectors
Optional
Primitive & Parallel Streams

Spring Boot

Dependency Injection & IoC
Spring IoC Container & Bean Lifecycle
Component Scanning & Configuration
Spring Boot Auto-Configuration & Properties
Transaction Management

Spring MVC Fundamentals
Mapping Annotations & HTTP Methods
Path Variables & Request Parameters
Request and Response Handling
Validation & Exception Handling
Spring MVC Views and Thymeleaf
Advanced Spring MVC
REST API Design
Testing in Spring MVC

Microservices Fundamentals
Microservice Configuration
Inter-Service Communication
Service Discovery & Eureka
API Gateway
Resilience4j
Configuration Management
Event-Driven Architecture & Kafka
Distributed Transactions
Observability
Security
Deployment

Java Bean Validation
Exception Handling
Task Execution & Scheduling
Spring Batch

JPA, Hibernate, and Spring Data JPA
Entities and the Repository Abstraction
Query Methods and JPQL with @Query
Pagination, Sorting, and Projections
Dynamic Queries with Specifications
Relationships, Fetching, and the N+1 Problem
The Persistence Context and Locking
Auditing in Spring Data JPA
Testing Spring Data JPA Repositories

React

What Is React?
Creating a React Application
JSX

Components
Props
Component Composition

Events
State
Conditional Rendering
Lists & Keys

What Are Hooks?
useEffect
useRef
useMemo & useCallback
Custom Hooks

Controlled Components
Form Handling

React Router Basics
Route Parameters & Navigation

Fetching Data
React + REST API

Sharing State
Context API

React Performance
Error Boundaries
Lazy Loading & Code Splitting
Suspense
Portals

Component Testing
User Interaction Testing

Build & Deployment
React + Spring Boot Deployment

Artificial Intelligence

What Is Artificial Intelligence?
Machine Learning
Deep Learning
Generative AI

How Large Language Models Work
Tokens and Context Windows
Prompting and Prompt Engineering
LLM Capabilities and Limitations

Tools and Function Calling
Introduction to MCP
MCP Architecture
Building an MCP Server

What Is an AI Agent?
Agent Planning and Reasoning Patterns
Controlling Agent Behavior
Building an AI Agent in TypeScript

AI-Assisted Software Development with Claude Code

PostgreSQL

PostgreSQL and the Relational Model
Connecting to PostgreSQL: psql and a Real Spring Boot DataSource
Databases, Schemas, Tables, and Basic SQL Syntax
PostgreSQL Data Types
Constraints and Keys
Inserting, Updating, and Deleting Data
SELECT and Filtering
Sorting, Limiting, and Pagination
JOINs
Aggregation and GROUP BY

Subqueries, CTEs, and Window Functions
PostgreSQL-Specific Data Types: UUID, JSON/JSONB, and Arrays
Indexes and Query Performance with EXPLAIN
Transactions and Concurrency in PostgreSQL

Git & GitHub

Git Fundamentals
Working With Commits
Undoing Changes
Branches & Merging
GitHub & Remotes
Pull Requests

Rebase & Squash
Merge Conflicts
Stash
Advanced Git & Best Practices
Practical Git & GitHub Workflow

Docker

What Is Docker?
Docker CLI Fundamentals
Docker Images and Dockerfiles
Dockerizing a Spring Boot Application

Docker Networking
Docker Volumes
Docker Compose
Production Docker for Java Applications
The Practical Project: Spring Boot + PostgreSQL with Docker

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Spring Core
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