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  • Combining Treasures from Different Chests 💰

    JAVA 25 SELF
    Level 28, Lesson 1
    Combining Treasures from Different Chests 💰
    1
    Locked
  • Reclassification of Pets at the "Friend" Pet Store 🐶

    JAVA 25 SELF
    Level 28, Lesson 2
    Reclassification of Pets at the "Friend" Pet Store 🐶
    1
    Locked
  • Cleaning the competition participants list from "suspicious" results 🏅

    JAVA 25 SELF
    Level 28, Lesson 2
    Cleaning the competition participants list from "suspicious" results 🏅
    1
    Locked
  • Planning the perfect weekend 🏖️

    JAVA 25 SELF
    Level 28, Lesson 3
    Planning the perfect weekend 🏖️
    1
    Locked
  • Dynamic Pricing at the "Inspiration" Art Gallery 🎨

    JAVA 25 SELF
    Level 28, Lesson 3
    Dynamic Pricing at the "Inspiration" Art Gallery 🎨
    1
    Locked
  • Creating a "Recently Viewed Products" list for an online store 🛍️

    JAVA 25 SELF
    Level 28, Lesson 4
    Creating a "Recently Viewed Products" list for an online store 🛍️
    1
    Locked
  • Developing a smart cache for game assets 🚀

    JAVA 25 SELF
    Level 28, Lesson 4
    Developing a smart cache for game assets 🚀
    1
    Locked
  • Unique cities registry in a virtual world 🗺️

    JAVA 25 SELF
    Level 29, Lesson 0
    Unique cities registry in a virtual world 🗺️
    1
    Locked
  • Managing employees in the new HR system 👥

    JAVA 25 SELF
    Level 29, Lesson 0
    Managing employees in the new HR system 👥
    1
    Locked
  • Creating a digital fingerprint for books in the catalog 📚

    JAVA 25 SELF
    Level 29, Lesson 1
    Creating a digital fingerprint for books in the catalog 📚
    1
    Locked
  • Sorting event participants by name 🧑‍🤝‍🧑

    JAVA 25 SELF
    Level 29, Lesson 1
    Sorting event participants by name 🧑‍🤝‍🧑
    1
    Locked
  • Sorting a book catalog by multiple criteria 📖

    JAVA 25 SELF
    Level 29, Lesson 2
    Sorting a book catalog by multiple criteria 📖
    1
    Locked
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CodeGym CodeGym is an online course for learning Java programming from scratch. This course is a perfect way to master Java for beginners. It contains 1200+ tasks with instant verification and an essential scope of Java fundamentals theory. To help you succeed in education, we’ve implemented a set of motivational features: quizzes, coding projects, content about efficient learning, and a Java developer’s career.
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Programmers Are Made, Not Born © 2026 CodeGym