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How to use Gemini to increase productivity

How long will you keep struggling with repetitive daily research and document writing? I, too, was an ordinary office worker who worked overtime every day trying to find key insights amidst an overflow of information. However, after integrating Gemini 3 into my workflow, I experienced a significant increase in work speed. Boost your productivity by utilizing Gemini in your tasks.

(4.9) 7 reviews

26 learners

Level Beginner

Course period 3 months

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🚀 [New Course Open] Master Spring Boot 4 — From New Features to 3.x Migration

Hello! I've launched a new course.

Open-source support for Spring Boot 3.5 ended in June 2026. Now is the time to upgrade, not say, “I’ll upgrade someday.” But when you actually look for examples, most blog posts use code from the 4.0 milestone releases, so they often don’t work with the official release.

Therefore, I created a course based on the official releases of Spring Boot 4.1.1, Spring Framework 7, and Java 25, with all code compiled and all tests passing.

✅ Features Unique to This Course

  • All figures were measured directly.

    • With a single line of virtual thread configuration, I reduced the time to process 2,000 requests from 5.2 seconds to 0.7 seconds.

    • I also directly verified that the number of auto-configuration candidates decreased from 279 to 92.

    • Using the JVM AOT cache makes startup approximately 2.4 times faster.

  • We’ll complete one project from start to finish. Over 26 lessons, we’ll build up a library shelving API and verify all its behavior with 36 tests.

  • I’ll show you the actual migration process. We’ll cover the three causes behind the 20 compilation errors encountered while upgrading a 3.5 project to 4.1, along with the subtle configuration changes that the tools don’t tell you about.

  • We always compare 3.x and 4 code side by side.

📚 What You’ll Learn

  • A new modularized starter system, Java 25, and virtual threads

  • Jackson 3, Hibernate 7, RFC 9457 ProblemDetail

  • Official API versioning: @GetMapping(version = "2.0"), Deprecation and Sunset headers

  • @Retryable and @ConcurrencyLimit integrated into the core, HTTP Service Client, BeanRegistrar

  • Null safety using JSpecify and NullAway, JUnit 6, @MockitoBean, RestTestClient, and Testcontainers 2

  • OpenTelemetry, health probes, container images, and AOT

  • Migration strategies and hands-on practice for moving from 3.x to 4.

👉 Recommended for those who:

  • Those who have used Spring Boot 3 and want to properly understand what has changed in version 4

  • Those who need to upgrade a 3.x service currently in operation to 4.

📦 A total of 26 lessons, approximately 8 hours and 40 minutes of content, along with all the practice code, a configuration cheat sheet, and a migration checklist.

🎁 [To celebrate the launch, a 30% discount will be available for one month.]

🔗 [Course link] https://inf.run/o9pF2

We appreciate your interest! 🙏

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