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Exercises to learn lambda syntax + the Streams API from the upcoming JDK 8 release

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Lambda Tutorial Build Status

A set of exercises to teach use of Java 8 lambda syntax, and the Streams API.

To follow the exercises:

  • fork and clone the repository
  • ensure you have a correctly configured, JDK8+ build
    • Maven can help generate configuration for your favourite IDE
    • ensure your cloned project, particularly the class ConfigureYourLambdaBuildOfJdk compiles and runs correctly
  • navigate to the first exercise, Exercise_1_Test (tests are in src/test/java, in the package org.adoptopenjdk.lambda.tutorial)
  • read background information in the JavaDoc, and follow instructions, making the test pass
  • to find solutions check out different branches of the project. Two flavours of solutions are available: what it might have looked like before JDK 8, and what it might look like after JDK 8. Those are in branches solutions-prejava8 and solutions-postjava8 respectively.

Exercises

  1. Internal vs External Iteration (the forEach method)
  2. Filtering and Collecting
  3. Mapping
  4. Method References
  5. Default methods on interfaces

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Exercises to learn lambda syntax + the Streams API from the upcoming JDK 8 release

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