• A hands-on programming exercise which helps hone your skills through practice.
• Code Katas are usually set up as a series of unit tests which fail. Your task is to make them pass.

I hear and I forget.
I see and I remember.
I do and I understand.

-- Confucius

• Java Lambda Kata - Practice and learn Java 8 lambdas with simple exercises
• Deck of Cards Kata - Practice using Java 8 Streams, Eclipse Collections, Guava, Apache Commons and/or Vavr on a simple domain
• Donut Kata - Practice and learn more advanced Eclipse Collections APIs using Java or Kotlin
• Calendar Kata - Practice and learn the APIs in the Java 8 Date/Time and ThreeTen-Extra libraries.
• CodePoint Kata - Read a secret message from a file into memory, translate it and then write out the revealed message to a file.
• JMH Kata - Experiment with the Java Microbenchmark Harness by running and writing micro-benchmark performance comparisons.
• Pitest Mutation Kata - Practice and learn how to improve the quality of your tests by hunting mutants.
• Kata of Katas - Practice and learn advanced methods in Eclipse Collections.
• Coffee Shop Kata - Practice and learn the latest Java features while comparing them with the older ones.

• Eclipse Collections Katas - Practice and learn Eclipse Collections Data Structures and Algorithms with seven code katas

1. Java 21
2. Maven 3.6.1+
3. IDE of your choice