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  • Active players list: Iteration over CopyOnWriteArrayList 🎮

    JAVA 25 SELF
    Level 53, Lesson 2
    Active players list: Iteration over CopyOnWriteArrayList 🎮
    1
    Locked
  • Counting Visitors at a Mega-Event: Thread-Safe Counter 🏟️

    JAVA 25 SELF
    Level 53, Lesson 3
    Counting Visitors at a Mega-Event: Thread-Safe Counter 🏟️
    1
    Locked
  • Updating the Current Guild Leader: Safe Object Update with AtomicReference 👑

    JAVA 25 SELF
    Level 53, Lesson 3
    Updating the Current Guild Leader: Safe Object Update with AtomicReference 👑
    1
    Locked
  • Detective inside the program: Determining the current thread's state 🕵️‍♂️

    JAVA 25 SELF
    Level 53, Lesson 4
    Detective inside the program: Determining the current thread's state 🕵️‍♂️
    1
    Locked
  • Access to the Secret Room: Logging entry and exit from the critical section 🚪

    JAVA 25 SELF
    Level 53, Lesson 4
    Access to the Secret Room: Logging entry and exit from the critical section 🚪
    1
    Locked
  • Assigning a Name to the Digital Worker 🤖

    JAVA 25 SELF
    Level 54, Lesson 0
    Assigning a Name to the Digital Worker 🤖
    1
    Locked
  • Robotic Arms Operation Audit 📊

    JAVA 25 SELF
    Level 54, Lesson 0
    Robotic Arms Operation Audit 📊
    1
    Locked
  • Sending an urgent package by drone 📦

    JAVA 25 SELF
    Level 54, Lesson 1
    Sending an urgent package by drone 📦
    1
    Locked
  • Decoding the Ancient Prophecy 🔮

    JAVA 25 SELF
    Level 54, Lesson 1
    Decoding the Ancient Prophecy 🔮
    1
    Locked
  • Measuring the Energy Potential of Artifacts ✨

    JAVA 25 SELF
    Level 54, Lesson 2
    Measuring the Energy Potential of Artifacts ✨
    1
    Locked
  • Organizing the Animal Parade 🐾

    JAVA 25 SELF
    Level 54, Lesson 2
    Organizing the Animal Parade 🐾
    1
    Locked
  • Task Distribution for Digital Accountants 💼

    JAVA 25 SELF
    Level 54, Lesson 3
    Task Distribution for Digital Accountants 💼
    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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