Spring Boot for Beginners (2026 Edition)
Build a Spring Boot 3 application from zero: starter dependencies, auto-configuration, application.yml, RESTful APIs, validation, unit testing and jar packaging with full source code.
Structured tutorials for mainstream backend languages — Java, Python, Go, Node.js, PHP and Rust — plus MySQL, Redis, message queues, microservices and Linux DevOps knowledge, from beginner to production.
Build a Spring Boot 3 application from zero: starter dependencies, auto-configuration, application.yml, RESTful APIs, validation, unit testing and jar packaging with full source code.
What Java is, why it dominates backend development, how the JVM works, and a step-by-step JDK installation with your first Hello World program.
Creating threads, synchronized and volatile, ReentrantLock, ThreadPoolExecutor parameters, and composing async work with CompletableFuture — the concurrency knowledge backend interviews demand.
Primitive and reference types, var keyword, operators, if/switch/for/while, arrays and method definitions — the complete syntax foundation for writing Java.
Routing, path and query parameters, Pydantic validation, dependency injection, async databases, JWT authentication and Docker deployment — modern Python backend in one guide.
Service decomposition, communication styles, API gateway, service discovery, resilience patterns and observability.