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Updated: 23/06/2026

Java course online

Java is one of the most popular languages for learning object-oriented programming and building applications. On BitWizards you run it without installing the JDK - the code executes in a secure server environment, and the program reads keyboard input in an interactive console (Scanner).

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What you will learn

  • The structure of a Java program, System.out.println, types and variables.
  • Conditional statements, loops, methods.
  • Classes and objects - the basics of object-oriented programming.
  • Reading input interactively with Scanner, live in the console.

How you learn on BitWizards

  • The console behaves like a real terminal: Scanner.nextLine() waits, you type your input and the program responds.
  • Safe, isolated execution - with time and memory limits.
  • Exercises with automatic result checking.

Java and the INF.04 exam

Java is a strong choice for INF.04 (Polish vocational IT qualification) - designing, programming and testing applications, especially with an object-oriented approach. It complements C++ and Python well.

C++ - Python - SQL and MySQL

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Frequently asked questions

Do I need to install the JDK?

No. Java runs in a secure environment on our server, and keyboard input (Scanner) is handled through an interactive console in your browser.

Is Java a good language for learning object-oriented programming?

Yes. Java is one of the best languages for learning OOP: classes, objects, methods and encapsulation feel natural in it.

Is Java on the INF.04 exam?

Yes. Java is a popular language in INF.04 - designing and programming applications, especially object-oriented ones.

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