Free Course — No signup required

Learn Enterprise Backend
in 5 Days

OOP fundamentals that transfer to every language. Spring Boot APIs. Database access with JDBC.

5 lessons
Self-paced
~60 min/day
Free forever
No account needed

Java in 5 Days

Free 5-day Java course. OOP, collections, Spring Boot REST APIs, JDBC database access, and deploying Java applications.

  • Write Java classes, inheritance, and interfaces confidently
  • Use the Collections framework: List, Map, Set effectively
  • Build a REST API with Spring Boot in under an hour
  • Connect to a database using Spring Data JPA
  • Write unit tests with JUnit and Mockito
  • Package and deploy a Spring Boot application as a JAR or Docker container
JVM
platform
Spring
Boot
5
lessons
$0
cost

Every lesson has a real exercise.
No theory without practice.

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B
Bo Peng
Founder, Precision AI Academy

Kaggle Top 200 data scientist. Trained 400+ professionals across universities and federal agencies. Built production systems at scale. This course is practical first — every lesson has code you can run and an exercise you can finish in under an hour.

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