It consists of 10 levels dedicated to the basics of the Java language.
The course tells what classes, objects, methods and variables are. Basic data types, arrays, conditional operators, loops and lambda functions. Collections and the basics of OOP.
Getting started in IntelliJ IDEA.
It consists of 10 levels in which you will learn the basics of OOP, get acquainted with threads, serialization, method overloading, learn a lot about interfaces and multiple inheritance.