Full Java developer training materials and references. Feel free to use for any educational (free or commercial) purposes. Topics:
Core Java language
Object Oriented Programming (part 1)
Object Oriented Programming (part 2)
Data structures
Algorithm Complexity
Core JDK APIs (part 1)
Core JDK APIs (part 2)
Core JDK APIs (part 3)
Git Crash course
JVM internals
Clean code and refactoring
Design patterns
Unit testing
Test automation
Concurrent programming (part 1)
Concurrent programming (part 2)
Concurrent programming (part 3)
Build systems
RDBMS fundamentals
MySQL fundamentals
SQL: basic data retrieval
SQL: insert, update, delete
SQL: joins and nested queries
SQL: aggregations and functions
SQL: DDL and views
Transactions
Users, roles and permissions
Stored procedures in MySQL
RDBMS objects and metadata
NoSQL databases
JDBC
ORM fundamentals
Hibernate: architecture and features
Hibernate: manipulating persistent objects
Hibernate: queries and transactions
Hibernate: advanced concepts and design patterns
Spring framework overview
Spring MVC
The RabbitMQ Message broker
Apache Kafka
Docker