UPDATEJune 2022 - Ihave just published my Java SE 11 Developer (1Z0-819):Java 11 OCP course. Lambdas and Streams are contained in that much larger course. Please check out the new course as it may be much better value.

UPDATE April 2022 - lambdas/method references assignment added!

This course is a systematic approach to explaining in both notes format and code examples, lambda expressions and streams in Java.All the code samples are included.

Topics include:

• Lambdas:

  • Functional Interfaces

  • Lambdas and their relationship to Functional Interfaces

  • Lambdas in code using a custom Functional Interface

  • Lambdas in code using the pre-defined API Functional Interfaces:

    • Predicate/BiPredicate

    • Supplier

    • Consumer/BiConsumer

    • Function/BiFunction

    • UnaryOperator and BinaryOperator

  • final and "effectively final"

  • Method References:

    • bound

    • unbound

    • static

    • constructor

    • context and it's effect in understanding method references

• Streams:

  • Pipelines

  • Laziness

  • Creating streams

  • Terminal operations:

    • reduce()

    • collect()

      • Collectors.toMap()

      • Collectors.groupingBy()

      • Collectors.partitioningBy()

  • Intermediate operations:

    • filter(), distinct(), limit()

    • map(), flatMap(), sorted()

  • Primitive streams:

    • Creating

    • API

    • Functional Interfaces

    • Mapping between primitive streams

    • Mapping between primitive streams and Object streams and vice versa

  • Optionals

  • Parallel streams

This course is geared towards Java Certification i.e. the Predicate lambda sections would suit Java 8 OCA (1Z0-808). The remaining lambda sections and the streams sections would suit both Java 8 OCP (1Z0-809) and Java 11 (1Z0-819). This course explains the concepts through small, simple, targeted code examples.

For those who don't know me, my "Java 8 OCA (1Z0-808) Course" is, at the time of writing, the highest rated Java 8 OCAcourse on Udemy. I am a lecturer since 2002 and have taught the OCA and OCP syllabii since 2013 on behalf of a highly regarded software company. On completion of the courses with me, graduates then face the company's own internal Java Certification exam (similar in style to Oracle's). I have no visibility into the questions they will face. It is a 3 hour long intensive exam. The company are delighted with the pass rate (100% since year 1).

I love teaching and this course has all my experience in explaining lambdas and streams in Java. Iam delighted that Enthuware (the excellent Java certification training tool), have, in their explanations, linked to my YouTube channel.