"Thanks Mike! What a blast from the past! That Red Hat swag! ;-). Jim"
Codetown
Codetown ::: a software developer's community
Codetown is a software developer's community. It's a technical networking and educational group focused on software development.
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JavaSpecialists
Issue 327 - ShuffleGatherer
Instead of shuffling our stream at the end in the collect() method, we can also shuffle it in stages using the new stream gatherers. This allows us to shuffle sections at a time and even support infinite streams.Issue 326 - Stream Gathering with a Different Distinct Function
A few years ago, we tried to create a new distinct() function for a Stream. It wasn't pretty. In this newsletter we revisit that adventure using the new Stream Gatherers from Java 24.Issue 325 - Be a Distinguished Java Engineer in the Age of Vibe Coding
We are all amazed how AI can help us in everyday tasks. It can even write Java code. But "Show me the Pull Requests" (Evans) sums it up nicely. We do not (yet) see AI massively improving open source projects.Issue 324 - Sequenced LinkedHashSet
LinkedHashSet implements the SequencedCollection interface, allowing us to addLast(), addFirst() and even reverse the collection. This sometimes causes some surprises.Issue 323 - Visiting All Threads (Including Virtual)
In this newsletter, we explore how we can visit the entire hierarchy of threads in our virtual machine, including virtual threads. We do this using the composite, visitor and facade design patterns.Birthdays
Birthdays Today
Birthdays Tomorrow
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Events
September 29
Monday
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Dev2Next
September 29, 2025 at 6pm to October 1, 2025 at 7pm – Colorado Springs Marriott
It's hard to believe, but we're in the last few weeks heading up to the dev2next 2025 conference. I'm eager to welcome speakers and attendees at the event. The Near Time Registrati…
Organized by Venkat | Type: conference
Blog Posts
New Java features
Posted by Michael Levin on August 29, 2025 at 5:32pm 0 Comments 0 Likes
August 28 2025, Newsletter no. 297 (this newsletter is available in html format at http://www.javaperformancetuning.com/news/news297.shtml )
As usual before a Java release, I'm listing all the new…
Free Eclipse book, recently published
Posted by Michael Levin on August 24, 2025 at 11:59am 0 Comments 0 Likes
ContinueHi Everyone,My publisher is running a free Amazon Kindle book promotion through Monday, August 25th, 2025. The book, “Eclipse Collections Categorically: Level up your programming game” can be obtained for $0 on Kindle on Amazon through the August 25th.…
What is vibe coding?
Posted by Michael Levin on June 9, 2025 at 9:37am 0 Comments 0 Likes
Vibe coding isn’t a formal technical term, but it’s become a slang or colloquial expression among programmers and tech communities—especially on social media and in creative coding circles.
What “vibe coding” usually means:
- Coding based on intuition or feel
Instead of rigidly planning everything out, you’re:- Freestyling as you…
You can now download the source code that sparked the AI boom
Posted by Michael Levin on March 25, 2025 at 4:30am 0 Comments 0 Likes
Learning about artificial intelligence? You may find this interesting.
https://arstechnica.com/ai/2025/03/you-can-now-download-the-source-code-that-sparked-the-ai-boom/
Next OJUG and GatorJUG Meetings will be fabulous - Check out the Codetown Events
Watch for details on our upcoming meetings. OrlandoJUG meeting's fall on the 4th Thursday of every month, in case you want to mark your calendars. Stay tuned for details! GatorJUG meets the 2nd Wednesday of every month.
The details are posted in the CodeTown Events section. Please RSVP so we'll know how much pizza to order. Stay tuned! ...Mike
Groups
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Kotlin Town
6 members
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Computational Linguistic…
15 members
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Jobs
75 members
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Contest Town
9 members
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OrlandoJUG Town
96 members
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GatorJUG Town
30 members
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Community Corral
23 members
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Scala
5 members
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Freelance Village
11 members
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iPhone Development
40 members
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Ruby Town
14 members
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Clojure
8 members
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Groovy and Grails
25 members
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Other Languages on the J…
9 members
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Java SE Town
14 members
Forum
Java books for any library 5 Replies
What books should be on the bookshelf of EVERY Java programmer, no matter what specific technologies they are working on?The two that come to my mind areThinking in JavaJava Concurrency in PracticeWhat else am I missing?Continue
Started by David Moskowitz in Java. Last reply by sneha gulati Feb 8, 2019.
Error trying to use Fragment
I am new to Android. I have been working thru some examples in a book called Head First Android Development. I entered a small program using fragments and get a Casting Error.cannot cast andoid.app.fragment to…Continue
Tags: Fragment
Started by Robert Sobol in Java Oct 10, 2017.
Fragment Syntax Problem
My name is Rob Sobol.I have been working through a book called Head First Android Development.I hit a syntax error in a simple exercise that uses one fragment. I have been trying to figure out the error for days. I am hoping some in the forum can…Continue
Tags: Fragments
Started by Robert Sobol in Java Oct 10, 2017.
Hadoop getting old?
An article just came out in InfoWorld about trends, which is always an interesting subject. Funny, they said Hadoop wasn't hot. Spark is. It's a good read. …Continue
Tags: codetown, infoworld, programming, hadoop, trends
Started by Michael Levin in Trends Apr 10, 2017.
What's functional programming, anyway?
Can you believe people are still trying to come up with a good definition or explanation of what functional programming is? Paul Krill is a journalist with InfoWorld. Here's an article he just wrote: …Continue
Tags: functions., codetown, lambdas, clojure, programming
Started by Michael Levin in Functional Programming Feb 21, 2016.
Santafe College 2 Replies
Santafe just added a new BAS bachelor's program of study. 5651 ProgrammingContinue
Started by Dan Lackey in Dynamic Languages. Last reply by Michael Levin Feb 15, 2016.
Using SQL with Node,.js 1 Reply
All the tutorials and books for node.js seem to use Mongo as the database. I am not sold on 'document' databases and would like to know how difficult it is to use any version for plain old tried-and-true SQL with Node.js.Does anybody have any…Continue
Tags: 'document, databases', SQL, node, node.js
Started by Kevin Neelands in Dynamic Languages. Last reply by Lou Caudell Nov 10, 2015.
The advantages of a RESTfull web-based API 5 Replies
I need to get a better handle on the advantages of a RESTful web-based API. People tell me they scale better than other methods, but I don't see how they reduce database access or have any other feature that helps handle large amounts of traffic.…Continue
Tags: API', 'web-based, RESTful
Started by Kevin Neelands in Dynamic Languages. Last reply by Kevin Neelands Oct 25, 2015.
Want a Job? 1 Reply
Hi, Not sure if this is the appropriate place to post this sort of things (forgive me if its not). My company (really nice company btw) is looking to hire two junior and two senior Java Developers. Please forward me your resume to slaassel@gmail.com…Continue
Started by Saad Laassel in Java. Last reply by Theresa Wizorek-MacIntyre Oct 15, 2014.
Storing Sensitive Data ( like SSNs ) 1 Reply
We might have to store Social Security Numbers. We REALLY don't want to do this in our own database, we'd like some external 'vault' service that stores them encrypted and getting to them is difficult. Does anyone have any ideas along these lines?Continue
Started by Kevin Neelands in Java. Last reply by Michael Levin May 7, 2014.
Latest Activity
Dev2Next at Colorado Springs Marriott
September 29, 2025 at 6pm to October 1, 2025 at 7pm
It's hard to believe, but we're in the last few weeks heading up to the dev2next 2025 conference. I'm eager to welcome speakers and attendees at the event. The Near Time Registration is open for those who have been waiting to get their final approvals to attend. Hotel rooms reserved, flights booked, meals planned, swags ordered (did I say swags), I can't wait for the…See More
New Java features
August 28 2025, Newsletter no. 297 (this newsletter is available in html format at http://www.javaperformancetuning.com/news/news297.shtml )As usual before a Java release, I'm listing all the new performance features in the upcoming release, this time for Java…See More
Free Eclipse book, recently published
Hi Everyone,My publisher is running a free Amazon Kindle book promotion through Monday, August 25th, 2025. The book, “Eclipse Collections Categorically: Level up your programming game” can be obtained for $0 on Kindle on Amazon through the August 25th.https://www.amazon.com/Eclipse-Collections-Categorically-Level-programming-ebook/dp/B0FFM5MHBV/The Kindle…See More
See Y’all soon, I hope!
Hello Juggies! The time has come for someone else to take the reins with this group. It’s been incredibly rewarding for over 20 years and I thank all of you for your contributions. Hopefully I will see many of you at the next meet up.Best regards,MikeSee More
"Hello Juggies!
The time has come for someone else to take the reins with this group. It’s been incredibly rewarding for over 20 years and I thank all of you for your contributions. Hopefully I will see many of you at the next meet up.
Best…"
Don Swanson's Paper on Undiscovered Public Knowledge | INNER COSMOS WITH DAVID EAGLEMAN
🛎 If You're New Subscribe ► https://bit.ly/InnerCosmosPodSubscribeThis clip is from Ep 112: How is computer code like magic? (with Sam Arbesman) | INNER CO...
What We Get Wrong About AI (feat. former Google CEO)
AI is here. Now what?Subscribe to support optimistic tech journalism!Everyone’s talking about artificial intelligence and machine learning. There are lots of...
What is vibe coding?
Vibe coding isn’t a formal technical term, but it’s become a slang or colloquial expression among programmers and tech communities—especially on social media and in creative coding circles.What “vibe coding” usually means:Coding based on intuition or feel Instead of rigidly planning everything out, you’re:Freestyling as you codeTrusting your gutLetting ideas evolve naturallyFollowing the “vibe” of what feels right in the momentFlow state or artistic mindset It’s often associated with being in a…See More
Mark Cuban: Why Lifelong Learning is the Key to Success.
Mark Cuban reveals why being a lifelong learner is essential to success. Building anything great requires relentless learning and hard work — no shortcuts. H...
Happy 10th year, JCertif!
Notes
Welcome to Codetown!
Codetown is a social network. It's got blogs, forums, groups, personal pages and more! You might think of Codetown as a funky camper van with lots of compartments for your stuff and a great multimedia system, too! Best of all, Codetown has room for all of your friends.
When you create a profile for yourself you get a personal page automatically. That's where you can be creative and do your own thing. People who want to get to know you will click on your name or picture and…
ContinueCreated by Michael Levin Dec 18, 2008 at 6:56pm. Last updated by Michael Levin May 4, 2018.
Looking for Jobs or Staff?
Check out the Codetown Jobs group.
InfoQ Reading List
Cloudflare Introduces Automated Scoring for Shadow AI Risk Assessment
During AI Week 2025, Cloudflare announced Application Confidence Scores, an automated assessment system that is designed to help organizations evaluate the safety and security of third-party AI applications at scale.
By Renato LosioVercel Introduces AI Gateway for Multi-Model Integration
Vercel has rolled out the AI Gateway for production workloads. The service provides a single API endpoint for accessing a wide range of large language and generative models, aiming to simplify integration and management for developers.
By Daniel DominguezPresentation: Secure by Design: Building Security into Engineering Workflows and Teams
Stefania Chaplin explains how to integrate security into engineering workflows and teams using a "Secure by Design" approach. Drawing on her extensive experience, she shares practical strategies for a security-first culture by focusing on people, processes, and technology, including the use of security champions and automation to improve resilience and reduce costs.
By Stefania ChaplinPodcast: Why Software Development Sucks And 7 Mental Models To Help Fix It
Shane Hastie, Lead Editor for Culture & Methods, spoke to Thanos Diacakis about how teams often struggle with software delivery. He proposes a shift in mental models and a four-step framework to systematically improve software development by focusing on bottlenecks, balancing different types of work beyond just feature delivery, and investing 20-30% of effort in improving how the team works.
By Thanos DiacakisNext.js 15.5 Ships - Turbopack Production Builds, Node.js Middleware, and Tighter Typescript DX
Next.js 15.5 has landed, delivering faster builds and powerful server-side middleware. Key highlights include the Turbopack bundler, which boosts compilation speed by 2x to 5x, and Node.js middleware enhancements. TypeScript improvements enhance developer experience with stable typed routes and early error detection.
By Daniel Curtis
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