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Apr 12
I'll be presenting "Refactoring to Eclipse Collections: Making Your Java Streams Leaner, Meaner, and Cleaner" at the @GardenStateJUG meetup on April 14, 2026. Join to learn more reasons to refactor to #EclipseCollections.
"Hold onto your bytes!"🔢👀
🔗: gsjug.org/
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Feb 10
In part 1 of this 4 part blog series titled "Getting Started with #EclipseCollections", I cover "Creating Collections".
The creation examples include:
• Lists
• Sets
• Stacks
• Bags
• Maps
• SortedSets/Bags/Maps
• BiMaps
• Multimaps
...and more!
donraab.medium.com/getting-s…
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Jan 13
My first book is available on Kindle Unlimited for four more days. This blog👇 can help you get the most out of the book with limited time. Enjoy! 🙏
#Java #Smalltalk #EclipseCollections
donraab.medium.com/the-autho…
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26 Dec 2025
Does your #Java collections code still read like it's 2015?
"A decade feels like a very long month"
Happy ten year anniversary #EclipseCollections. ❤️
donraab.medium.com/the-ten-y…
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24 Dec 2025
The #EclipseCollections #Java library has been FREE and OSS since Dec. 25, 2015. To celebrate the 10 year anniversary, you can get a free Kindle version of the "Eclipse Collections Categorically" book on Dec. 24 & 25, 2025 and Jan. 1, 2026. Happy Holidays! 🤗 🥂
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1 Dec 2025
Grouping collections with @ApacheGroovy to reveal many-to-many relationships:
groovy.apache.org/blog/fruit…
#groovylang #manyToMany #eclipseCollections #jdkCollections
ALT grouping jdk and eclipse fruity collections with groovy
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17 Nov 2025
My latest blog: Mind Maps Didn't Make Me Scroll
It only took me a few years to realize that mind maps could help me communicate the package design in the api and impl jars for the #EclipseCollections OSS #Java library. Lesson learned and shared. 🙏
donraab.medium.com/mind-maps…
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6 Oct 2025
My latest blog: Refactoring to #EclipseCollections with #Java 25 at the #dev2next Conference
I really enjoyed giving this talk last week at @dev2next with my friend and co-speaker @zakhav.
Enjoy! 🙏
donraab.medium.com/refactori…
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17 Sep 2025
Just upgraded the project for my @dev2next talk w/ @zakhav to #Java 25. The project uses #EclipseCollections 13.0, and works just fine. EC 13.0 works w/ Java 17 . Not there yet? EC 12.0 supports Java 11 . Stuck in a "tech coma"? EC 11.1 supports Java 8 . 👍
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6 Sep 2025
After 21 years of developing, using, teaching, collaborating, blogging, podcasting, writing a book about #EclipseCollections, one thing motivates me to keep going.
There are millions of #Java developers that don't know what they have been missing for 21 years.
IYK, then LTK. 🙏
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16 Aug 2025
Published a release blog for the back to back releases of Eclipse Collections 12.0 (Java 11 ) and 13.0 (Java 17 ).
Thanks to all of our users, contributors, and advocates! 🙏Congrats and welcome to our two newest #EclipseCollections committers! 🎉👏
donraab.medium.com/eclipse-c…
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8 Jul 2025
If you want to build up your understanding of #EclipseCollections before making your first OSS contribution to the library, you have 5(ish) ways.
• Blogs/Talks
• Code Katas
• Use the library
• Read 1M LOC
• Read book
The book can save you time.🤷♂️👇
donraab.medium.com/book-ecli…
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まさにImmutabilityは型で保証したくて、Scala標準のコレクションフレームワークではimmutableとmutableで型が分かれていますね
Javaでも guava や EclipseCollections でも ImmutableList とかが提供されてたりするので、この辺のライブラリいれてるなら積極的に使っていきたさ
型システムでnullableかnon-nullかを表明したいみたいな話はよく語られるけど、型システムでimmutableかmutableかも表明したいな？
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6 Jun 2025
While I don't know how many #Java developers use #EclipseCollections, I do know that EVERY #Java developer benefits from EC, because it is an active member of the OpenJDK Quality Outreach Program. EC reports issues it finds 👇 in its EA OpenJDK testing. 👍
bugs.openjdk.org/browse/JDK-…
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5 Jun 2025
#EclipseCollections 12.0 is in release review @EclipseFdn. Eclipse Collections Categorically (ECC) matte hardcover (center👇) is now available for pre-order on Barnes & Noble & GA on June 15. Amazon Kindle version of ECC will be GA on June 30.🙏
#Java summer forecast is 🌞🏖️☕📚
ALT Three copies of Eclipse Collections Categorically book on a wood floor as backdrop. Copy on the left is paperback glossy (7.5 x 9.25 inches) available on Amazon. Copy in the middle is hardcover matte (7.5 x 9.25 inches) available on Barnes and Noble in U.S. Copy on the right is hardcover glossy (8.25 x 11 inches) available on Amazon.
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15 May 2025
Look what showed up at my door! #EclipseCollections Categorically by @TheDonRaab! Also, hardcover! Can't wait to see how the final book has become! 😍
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5 Apr 2025
The #EclipseCollections repo on GitHub recently passed 2,500 stars. The project marks 10 years @EclipseFdn this year. 250 stars per year is modest, but steady growth. Thank you to everyone that starred the repo, and congrats to the contributors! 🙏 🎉
github.com/eclipse-collectio…
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23 Mar 2025
It took 21 years to accumulate and transfer my software development experience working on #EclipseCollections into my new book:
📙Eclipse Collections Categorically
The cover and content are both in full color. Enjoy!🙏👇
donraab.medium.com/book-ecli…
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