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Java 25

Java Brick by Brick

The whole Java Brick by Brick journey is available online: from the first explanations to advanced APIs, including the volume’s activities.

Java 25 · Complete guide · Draft under review

This guide retains the book’s draft status. Editorial review and comprehension checks with independent readers remain to be completed.

Start with the first brick

Follow the volume from fundamentals to tools, with examples, explanations and activities. The conclusions close the journey after the activities.

Start reading →

The complete journey

31 chapters and 8 activity collections.

  1. 1. Preface
  2. 2. Object-Oriented Programming
  3. 3. The Java Language and the Tools for Using It
  4. 4. Syntax, Variables, Operators, and Arrays
  5. 5. Controlling Program Flow
  6. 6. Packages and Modules
  7. 7. Defining classes and objects
  8. 8. Encapsulation
  9. 9. Inheritance, composition and sealed hierarchies
  10. 10. Object, wrapper classes and enumerations
  11. 11. Strings and Unicode text
  12. 12. Exceptions and error handling
  13. 13. Interfaces, abstract classes and polymorphism
  14. 14. Annotations: metadata and checks
  15. 15. Generics and Type Checking
  16. 16. Functions and Lambdas in Java
  17. 17. Choosing a Collection
  18. 18. Stream API: Pipelines, Reductions and Gatherers
  19. 19. Optional: When a Search Finds Nothing
  20. 20. Threads and Concurrency in Java
  21. 20A. Atomic Operations: One Shared Decision at a Time
  22. 21. Java Classloaders: Finding a Class While the Program Runs
  23. 23. Further reading: Vector API, processing data in groups
  24. 24. Reflection API: observing types at runtime
  25. 25. I/O, files and resources: taking data beyond the program
  26. 26. Time, localization and exact numbers
  27. 27. Networking and HTTP: asking another process for data
  28. 28. External memory and native functions: crossing the JVM boundary
  29. 29. From source to a program someone else can run
  30. 30. Quality, security and observability: understanding when the program is not enough
  31. Activities and Reasoned Solutions C01–C06
  32. Phase 3 activities
  33. C13–C18 Activities, First Draft
  34. C19–C24 activities, first draft
  35. C20A Activities — Atomic Operations
  36. C25–C28 activities: choose, test, transfer
  37. Guided activities for C29 and C30
  38. Concluding activities: choosing the next brick
  39. Conclusions. Keep building, brick by brick

Try the examples

Running the programs requires JDK 25. Download the individual Java files linked in the chapter or the complete example project, which includes instructions and a launcher script. The explanations also compare expected output: predict it before running the program.

Read the book as a PDF ↓Download the example project ↓Browse example files →

Massimiliano Tarquini · CC BY-NC 4.0