1. Spring Boot: From Java Code to Running Services

Spring Boot is a way to assemble Java applications with sensible defaults instead of configuring every framework component by hand. Starters bring related libraries together, auto-configuration responds to the libraries on the classpath, and an embedded server lets a web application run as a single executable program.

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A few annotations can connect an HTTP request to Java code that returns useful data. Spring Boot makes it practical to build REST APIs for mobile apps, browser interfaces, payment systems, internal tools, and services that communicate with other services.

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Real applications need more than request handling: they need databases, configuration for different environments, logging, health checks, and protection for sensitive endpoints. Spring Boot provides common patterns and integrations so teams can focus on the behavior of their product rather than rebuilding infrastructure from scratch.

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Spring Boot appears in business software, cloud services, e-commerce platforms, data systems, and internal company tools. Developers use it in roles such as backend engineer, platform developer, and full-stack engineer, while communities contribute starters, libraries, guides, and production practices around the Java ecosystem.

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