Learn one idea in context.
Begin with a small example. Read the explanation, trace its behaviour and type it into your own project. The goal is to make each step inspectable.
About Kodrelvantanta
Understand the code.
Then make it your own.
We publish written Java learning material for people who like to pause, question and try an idea for themselves.
The idea behind the collection
More context.
Fewer unexplained steps.
A working program is a starting point. The useful part is knowing why it behaves that way, what changes when the input is different and where a particular approach stops being appropriate.
Our course descriptions follow that principle. Each guide names its scope, its intended reader and the knowledge it builds on.
A readable explanation.
A practical next question.
Connect ideas carefully.
Later guides introduce testing, HTTP services and persistence after the language foundations. Frameworks make more sense when the Java underneath is familiar.
What we teach
The collection covers JDK setup, Java syntax, object-oriented design, collections, streams, concurrency, JUnit 5 and Mockito, Spring Boot, and relational database access through JDBC and JPA.
What this format offers
Downloadable PDFs let you read at your own pace and keep a local reference beside your editor. The guides are written study material; they do not include live classes, video lessons, personal mentoring or an assessed qualification.
About authorship
Kodrelvantanta is the company that owns and operates this online store (company number 132408766). Osval Mikulevic is the listed contact person for questions about the store and its digital course materials. Use the free guide and published curriculum to assess the learning material for yourself.
Read the free starting point ↗A clear place to start
One small program.
A new way to think.
Begin with the free guide. Set up Java, run your first class
and work through three small exercises.