How to Practice Spring Boot After Watching Tutorials

Mar 9, 2026

Problem

After finishing a 10-hour Spring Boot video course, I sat down to build my own project. I opened IntelliJ, created a new project, and stared at the screen. Nothing came to me.

I found this post on r/learnjava that described exactly what I felt:

“I’ve been learning Spring Boot for weeks, watching tutorials and understanding the concepts, but when I try to build something on my own, I’m completely lost. How do I actually practice?”

The gap between watching tutorials and building real applications is real. I had consumed content but hadn’t built anything.

Environment

Java 17 (LTS version)
Spring Boot 3.4.x
Maven 3.9.x
IDE: IntelliJ IDEA
Timeline: 8-12 weeks to transition from tutorial consumer to independent builder

What happened?

I spent three weeks watching Spring Boot tutorials. I understood REST controllers, dependency injection, and JPA repositories. But when I tried to build a simple task manager application without following a tutorial, I got stuck on the first feature.

The problem? Passive watching. I had been consuming content instead of creating code.

Here’s what experienced developers on r/learnjava told me:

“Code along with him, then add a feature. What he teaches you is not complete, only the basics. Then you really need to get used to going through documentation and look for your answers because Spring and Spring Boot is way too massive.”

This changed everything. I realized tutorials provide foundation, but I needed active practice to build skills.

How to solve it?

I rebuilt my approach with three phases. Here’s what worked:

Phase 1: Code-Along with Immediate Enhancement (Weeks 1-2)

I stopped watching tutorials passively. Instead, I adopted this workflow:

Watch 10-15 minutes of a tutorial
Pause and implement what I just learned
Run and test each component
Add ONE custom feature before moving on

For example, the tutorial showed a basic REST controller:

@RestController
@RequestMapping("/api/users")
public class UserController {
    @Autowired
    private UserRepository userRepository;

    @GetMapping
    public List<User> getAllUsers() {
        return userRepository.findAll();
    }

    @PostMapping
    public User createUser(@RequestBody User user) {
        return userRepository.save(user);
    }
}

I implemented this, tested it with curl, and then enhanced it:

@RestController
@RequestMapping("/api/v1/users")
@Validated
public class UserController {

    private final UserService userService;

    public UserController(UserService userService) {
        this.userService = userService;
    }

    @GetMapping
    public ResponseEntity<Page<UserDTO>> getAllUsers(
            @RequestParam(defaultValue = "0") int page,
            @RequestParam(defaultValue = "10") int size,
            @RequestParam(defaultValue = "id") String sortBy) {

        Pageable pageable = PageRequest.of(page, size, Sort.by(sortBy));
        Page<UserDTO> dtoPage = userService.getAllUsers(pageable);
        return ResponseEntity.ok(dtoPage);
    }

    @PostMapping
    public ResponseEntity<UserDTO> createUser(
            @Valid @RequestBody CreateUserRequest request) {
        UserDTO created = userService.createUser(request);
        return ResponseEntity
                .created(URI.create("/api/v1/users/" + created.getId()))
                .body(created);
    }
}

The enhancements I added:

Constructor injection (best practice)
Pagination support
DTO pattern
Proper HTTP status codes
Input validation

Each enhancement forced me to encounter real problems: How do I map entities to DTOs? How do I handle validation errors? These questions led to deeper learning than just watching videos.

Phase 2: Documentation-Driven Development (Weeks 3-4)

After completing 2-3 code-along projects, I shifted to using official Spring Boot documentation as my primary resource.

This was uncomfortable. I was used to tutorials showing me exactly what to do. But I realized this comment was right:

“You really need to get used to going through documentation and look for your answers because Spring and Spring Boot is way too massive.”

I tried a documentation scavenger hunt: build a feature using only the official docs.

For example, I wanted to add caching to my service. The tutorial I watched never covered this. I opened the Spring Boot documentation and found the caching section.

Step 1: Add the dependency

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-cache</artifactId>
</dependency>

Step 2: Enable caching

@SpringBootApplication
@EnableCaching
public class MyApplication {
    public static void main(String[] args) {
        SpringApplication.run(MyApplication.class, args);
    }
}

Step 3: Add cache annotations

@Service
@CacheConfig(cacheNames = "products")
public class ProductService {

    private final ProductRepository productRepository;

    public ProductService(ProductRepository productRepository) {
        this.productRepository = productRepository;
    }

    @Cacheable(key = "#id")
    public Product getProduct(Long id) {
        return productRepository.findById(id)
                .orElseThrow(() -> new ProductNotFoundException(id));
    }

    @CachePut(key = "#result.id")
    public Product updateProduct(Long id, ProductUpdateRequest request) {
        Product product = getProduct(id);
        product.setName(request.getName());
        product.setPrice(request.getPrice());
        return productRepository.save(product);
    }

    @CacheEvict(key = "#id")
    public void deleteProduct(Long id) {
        productRepository.deleteById(id);
    }
}

This approach taught me how to navigate documentation, understand configuration options, and implement features without step-by-step guidance.

Phase 3: Progressive Project Portfolio (Months 2-3)

I built 4 projects of increasing complexity. This advice from r/learnjava guided me:

“After make 3-4 projects, then jump to Spring Security, AOP.”

Project 1: Task Management API (Fundamentals)

Focus areas:

Spring Web (REST controllers)
Spring Data JPA (CRUD operations)
Validation (Bean Validation API)
Exception handling (@ControllerAdvice)

This solidified core patterns. Nothing fancy, just solid CRUD with proper error handling.

Project 2: E-commerce Product Catalog (Intermediate)

Focus areas:

Multiple entities and relationships
DTOs and mapping
Service layer patterns
File upload handling

This project introduced complexity: products have categories, categories have products, images need storage.

Project 3: Blog Platform with Comments (Advanced)

Focus areas:

Authentication and authorization (Spring Security)
User roles and permissions
Pagination and sorting
Search functionality

Here’s where I finally tackled Spring Security—after 3 solid projects gave me context.

Project 4: Real-time Notification System (Expert)

Focus areas:

WebSocket integration
Scheduled tasks
Event-driven architecture
Monitoring with Actuator

@Component
public class ScheduledTasks {

    private static final Logger log = LoggerFactory.getLogger(ScheduledTasks.class);

    private final NotificationService notificationService;

    public ScheduledTasks(NotificationService notificationService) {
        this.notificationService = notificationService;
    }

    @Scheduled(fixedRate = 5000)
    public void checkPendingNotifications() {
        log.info("Checking pending notifications at {}", LocalDateTime.now());
        notificationService.processPending();
    }

    @Scheduled(cron = "0 0 9 * * MON-FRI")
    public void sendDailyDigest() {
        notificationService.sendDailyDigest();
    }
}

This project pushed me into async processing and real-time features.

Common pitfalls I hit

1. Tutorial paralysis

I kept watching more tutorials, thinking I needed to understand everything before building.

Solution: Limit tutorials to one topic. Then build. Immediately.

2. Copy-paste without understanding

I copied code from tutorials without knowing why it worked.

Solution: After copying, explain each line out loud. If I can’t explain it, I don’t understand it.

3. Skipping documentation

I relied entirely on tutorials instead of learning to read documentation.

Solution: For every new feature, try the documentation first. Only use tutorials when stuck.

4. Jumping to advanced topics too early

I tried Spring Security on my first project. I didn’t understand what I was securing.

Solution: Build 3-4 foundational projects first. Security makes more sense when you have something to protect.

5. Building alone without feedback

I worked in isolation. No code reviews, no GitHub repos.

Solution: Push everything to GitHub. Share projects. Accept that ugly code is better than no code.

The practice roadmap

Phase	Duration	Focus	Output
Code-Along	Weeks 1-2	Active implementation + enhancement	2-3 enhanced tutorial projects
Documentation	Weeks 3-4	Build from docs only	1 project using only official docs
Portfolio	Months 2-3	Progressive complexity	4 projects on GitHub
Advanced	Month 4+	Security, AOP, production features	Production-ready applications

Why this approach works

Tutorials give you knowledge. Practice gives you skill. The difference matters.

When I only watched tutorials, I could explain dependency injection. But I couldn’t design a service layer from scratch. After building 4 projects, I could sketch the architecture for a new application in minutes.

The progressive complexity also matters. Each project introduced one or two new concepts, building on what I already knew. Spring Security made sense because I understood controllers, services, and repositories from previous projects.

Documentation skills are the real long-term value. Tutorials become outdated. Documentation stays current. Learning to read Spring Boot’s reference guide means I can figure out any feature, even ones no tutorial covers.

Summary

In this post, I showed how to practice Spring Boot after watching tutorials. I covered a three-phase approach: code-along with immediate enhancement, documentation-driven development, and progressive project complexity. The key point is that passive watching doesn’t build skills—active coding does.

After 12 weeks with this approach, I had 4 projects on GitHub, documentation navigation skills, and the ability to build Spring Boot applications without tutorials. The gap between watching and building closed through consistent, deliberate practice.

Start today: take any tutorial project you’ve completed and add one feature using only the Spring Boot documentation. That’s your first step across the gap.

Final Words + More Resources

My intention with this article was to help others share my knowledge and experience. If you want to contact me, you can contact by email: Email me

Here are also the most important links from this article along with some further resources that will help you in this scope:

Oh, and if you found these resources useful, don’t forget to support me by starring the repo on GitHub!