JetBrains Academy Course Catalog
CoursesSkill paths

About

A hands-on Java course in Polish for the Object-Oriented Programming class, starting with console input and output. Every task combines a short theory section, code to complete, and automated tests.

Kurs do przedmiotu Programowanie obiektowe – Java (rok akademicki 2026/27). Pierwsza lekcja dotyczy operacji wejścia/wyjścia w konsoli: wypisywania tekstu na standardowe wyjście i strumień błędów (System.out, System.err), formatowania wyników (printf, String.format, Locale), wczytywania danych (Scanner, czytanie do końca danych) oraz nowości Javy 25 – klasy IO i zwartych plików źródłowych. Kolejne lekcje utrwalają podstawy języka: typy danych i operatory, instrukcje sterujące, metody statyczne, tablice, napisy oraz listę ArrayList.

Wymagania wstępne: znajomość podstaw składni Javy (zmienne, typy proste, instrukcje warunkowe, pętle, metody), IntelliJ IDEA z wtyczką JetBrains Academy oraz JDK 25 lub nowszy.

External author course

This course was created and is maintained by an independent author. JetBrains Academy only verifies that it works correctly and is safe to use. For any questions about the content, please contact the course author directly.

Content

  1. Wypisywanie tekstu: println i print
  2. Sekwencje specjalne
  3. Strumień błędów: System.err
  4. Formatowanie: printf i String.format
  5. Formatowanie: szerokość pól i wyrównanie
  6. Formatowanie w praktyce: paragon
  7. Wczytywanie danych: Scanner
  8. Wczytywanie do końca danych
  9. Java 25: klasa IO i zwarte pliki źródłowe
  10. Java 25: wczytywanie danych przez IO.readln()
  11. Java 25: czytanie do końca danych z IO.readln()
  1. Typy proste i literały
  2. Słowo kluczowe var i stałe final
  3. Operatory arytmetyczne i rzutowanie
  4. Operatory relacyjne i logiczne
  5. Klasa Math
  1. Instrukcja if i zasięg zmiennych
  2. Instrukcja switch
  3. Pętle for, while i do-while
  4. break, continue i pętle zagnieżdżone
  5. Podsumowanie: ciąg Collatza
  1. Definiowanie metod statycznych
  2. Przeciążanie metod
  3. Rekurencja
  4. Liczby pseudolosowe
  1. Tablice jednowymiarowe
  2. Pętla for-each i wyszukiwanie
  3. Tablice to referencje
  4. Klasa Arrays
  5. Metody o zmiennej liczbie argumentów
  6. Tablice dwuwymiarowe
  1. Porównywanie napisów, niezmienność i null
  2. Metody klasy String
  3. Znaki i klasa Character
  4. StringBuilder
  5. Podsumowanie: analiza tekstu
  1. ArrayList – podstawy
  2. Klasy opakowujące i autoboxing
  3. Wyszukiwanie i modyfikowanie list
  4. Podsumowanie: statystyki liczb

Learn with the tools developers use every day

Real-world development environment (Python)
Project-based learning journey (Python)
Collaboration via Git (Python)
Focused learning (Python)

  • Real-world development environment

    Gain hands-on experience with the same tools and workflows you'll use in your career, reducing the learning curve when transitioning to real-world projects.

  • Project-based learning journey

    Our plugin is designed to guide you through real coding projects that you can showcase in your portfolio after completion.

  • Collaboration via Git

    Easily track changes and collaborate on projects using Git — an essential tool for developers in every field.

  • Focused learning

    Enjoy fewer distractions with assignments, coding, debugging, and version control all in one window

Student? Get JetBrains IDEs & hands-on courses — free for the full duration of your studies.

What do you need to start?

1

Install the free JetBrains Toolbox App

The JetBrains Toolbox App 2.7+ makes setting up your course effortless. Already have a compatible IDE? It will launch it. If not, the app will install the right IDE for your course.

Learn more about our licenses here.

JetBrains Toolbox App illustration
2

Confirm the course launch

Click Take course and then Allow to open the Toolbox App.

Select Always Allow to skip this confirmation in the future.

To return to the course later, find it in your IDE's recent projects.

Need more help? Check out our guide.

Course launch confirmation illustration
JetBrains Toolbox App illustration

The JetBrains Toolbox App 2.7+ makes setting up your course effortless. Already have a compatible IDE? It will launch it. If not, the app will install the right IDE for your course.

Learn more about our licenses here.

JetBrains Toolbox App illustration

Click Take course and then Allow to open the Toolbox App.

Select Always Allow to skip this confirmation in the future.

To return to the course later, find it in your IDE's recent projects.

Need more help? Check out our guide.

JetBrains Toolbox App illustration

FAQ and troubleshooting

Yes, you will need the JetBrains Toolbox App and a JetBrains IDE.

Just click this link to install the JetBrains Toolbox App. We've taken care of all the necessary settings, and the app will handle the rest of the setup for you.

The JetBrains Toolbox App checks which IDE is compatible with your course and whether it is installed on your computer. If you have the necessary IDE installed, the app will open it. If not, JetBrains Toolbox will initiate the installation, prioritizing free community editions.

Yes, the JetBrains Toolbox App is essential, even if you already have a JetBrains IDE. It automatically prepares your IDE for studying by installing the required plugins and updating the IDE if necessary.

Please make sure you have the latest version of the JetBrains Toolbox App. To update, open the app and click Update Toolbox App, or download the latest version here.

If you’re using a Chrome-based browser, please also allow Find devices on local networks in the popup that appears on the course page. When this permission is granted, the page will detect when the Toolbox App opens on your system and you’ll be able to open the course properly.

Yes! It's 100% free and works with both the free and paid versions of JetBrains IDEs.

If you're a student, apply for the Student Pack to get full access to JetBrains IDEs for the duration of your studies. If not, check if you qualify for a free non-commercial license.

The configuration process may vary depending on the IDE you are using for the course. For detailed instructions, please refer to the Troubleshooting guide.
Report BugLeave Feedback
License

Learn to code like a pro with JetBrains Academy

Explore catalog

The course requires the latest installed version of Toolbox application. If you don’t have it, you can download it here.

Privacy & SecurityTerms of UseTrademarksLegalGenuine Tools
© 2000—2026 JetBrains s.r.o. All rights reserved. Developed with drive and IntelliJ IDEA
In-IDE learningFreepiojas

Object-Oriented Programming in Java (2026/27)

Advanced

You'll take this course in your JetBrains IDE.
Just install JetBrains Toolbox 2.7+, and we'll handle the rest!

Advanced
Subjects
AI Coding ToolsAI EngineeringAlgorithms and Data StructuresBackendCloud & DevOpsData ScienceDeep LearningDevOpsFrontendFull StackKotlin & AndroidMachine LearningMathML & MathPython 3.12SQL and DatabasesWeb Dev
Languages
C/C++GoHTML/CSSJavaJavaScriptKotlinPythonRustScala