Go from the basics to real-world Java skills in 21 days

Through practical lessons and AI guidance, you’ll build your skills step by step. By the end, you’ll be able to solve real-world tasks, work more efficiently, and build stronger projects.

  • Daily plan, 45-60 min a day
  • 7 lessons + 21 exercises
  • AI tutor included
duration21-day sprint
Topics7 total
Exercises21 total
levelIntermediate
  • No prior coding experience required
  • Practice tasks every day
  • Build impressive portfolio project

What you will learn

A powered by mentors Intermediate plan with structured subtopics, quizzes, and practice tasks.

01Core

Streams and lambda expressions

Process collections with the Stream API and functional lambdas.

02Core

Functional interfaces and method references

Use Function, Predicate, and Consumer interfaces with method references.

03Core

Optional and null safety

Eliminate NullPointerExceptions with Optional chaining and ifPresent.

04Core

Spring Boot basics

Build a REST API with Spring Boot, controllers, and service layers.

05Core

Unit testing with JUnit and Mockito

Write tests with JUnit 5 and mock dependencies with Mockito.

06Challenge

Multithreading and concurrency basics

Use threads, ExecutorService, and synchronized blocks safely.

07Challenge

Capstone: REST API with Spring Boot

Build and test a full REST API with Spring Boot and JUnit.

Watch the full learning flow

From picking a topic to finishing the first lesson — see the exact path you’ll take.

Is the course right for you?

This is for you if...

  • You want a clear, structured way to learn instead of jumping between random videos and articles.
  • You want to build real skills, not just watch lessons.
  • You are ready to practice regularly and improve step by step.
  • You want guidance, feedback, and a learning path that keeps you moving forward.
  • You want to reach a real outcome you can use in work, study, or personal projects.

This is not for you if...

  • You want instant results without putting in the work.
  • You are looking only for passive content to watch.
  • You already know the material covered in this course.
  • You are not ready to practice consistently.
  • You expect the course to do the work for you.

Loved by Lifelong Learners

See how students, professionals, and forward-thinkers are upgrading their minds with Kavka.

Kavka helped our engineering team master new frameworks without the typical 'tutorial hell' phase. The plans are exactly what we need: high-intent, actionable, and remarkably consistent.

Adam K.NovaStack

I’ve tried countless courses, but most are just passive watching. Kavka's practice tasks felt like real engineering work, forcing me to solve problems rather than just mimicking code. The lessons actually stuck this time.

Miguel TorresBackend Engineer

The structured learning experience here is just brilliant. Just thirty minutes a day and I was shipping complex features again. It keeps me honest and ensures I don't skip the fundamentals just to reach the 'fun' parts.

Emily ChenUX Designer

Simple pricing. Real skill growth.

Free

$0

Best for getting started

  • Access core modules for one chosen skill
  • 3 free practice tasks to explore how Kavka works
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Premium

$19$12/month

Best for intensive skill growth

  • Unlock all modules
  • Unlimited practice tasks
  • Priority support
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