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Java sealed classes and exhaustive pattern matching

https://neilmadden.blog/2026/04/24/java-sealed-classes-and-exhaustive-pattern-matching/
22•hnisjafx40•1h ago

Comments

armchairhacker•52m ago
Java also has recursive patterns and (maybe still in preview) literal patterns: `switch (x) { case A(B(true, var c)) -> f(c); }`
Larrikin•51m ago
Java continues to try and catch up to Kotlin https://kotlinlang.org/docs/sealed-classes.html

I didn't mind Java when the comparisons were to C++, Ruby, and Python. I can not find a reason to go back after Scala (which seemed to fail due to being indiscriminate) and especially Kotlin

sideeffffect•23m ago
> Java continues to try and catch up to Kotlin

Does it, really? Java has had pattern matching since 21 (2023). Kotlin still, to this day, the year of our Lord 2026, doesn't...

RepRapMicron

https://github.com/VikOlliver/RepRapMicron/wiki
181•RobotToaster•2h ago•25 comments

macOS 15.8.2 Breaks OpenGL

https://developer.apple.com/forums/verify-human/verify.html?next=/forums/thread/850550
80•Audiophilip•1h ago•40 comments

Legal experts warn Meta's new terms still grant broad scraping permissions

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151•DeepLogin•6h ago•40 comments

DeepSeek search and fetch – $0.75 per 1000 successful requests

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410•fagnerbrack•9h ago•202 comments

Java sealed classes and exhaustive pattern matching

https://neilmadden.blog/2026/04/24/java-sealed-classes-and-exhaustive-pattern-matching/
23•hnisjafx40•1h ago•4 comments

Show HN: The Zelda timeline to catch up before the Ocarina of Time remake

https://legendofhyrule.com/
68•jsomau•3h ago•22 comments

Open MicroManipulator – A sub-micrometer 3D motion control plattform

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115•_Microft•5h ago•10 comments

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9•stmw•3d ago•0 comments

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81•evolve2k•1h ago•57 comments

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60•smilelamp•1h ago•70 comments

Parser Combinators

https://t3.at/blog/2026-10-17-parser-combinators/
146•schindlabua•8h ago•59 comments

How the Elizabeth Holmes documentary “You Can See Everything” is deceiving

https://www.readtheprofile.com/p/elizabeth-holmes-documentary-you-can-see-everything
263•MaysonL•13h ago•337 comments

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https://www.vals.ai/blogs/impossible-refund
28•DeepLogin•4h ago•11 comments

The Electronic Disturbance Theater and Electronic Civil Disobedience

https://www.thing.net/~rdom/ecd/EDTECD.html
15•jruohonen•2h ago•3 comments

Bleached corals thrive within days when touching healthy neighbour

https://www.nature.com/articles/d41586-026-03266-x
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209•critiquebrowser•12h ago•68 comments

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52•theanonymousone•3d ago•10 comments

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https://terriblesoftware.org/2026/10/02/the-brain-sandwich/
32•keyle•5h ago•10 comments

Voyage of the Paper Canoe: 2500 Miles from Quebec to the Gulf of Mexico, 1874-5

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Regex visualized as 3D marble run

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63•seizethecheese•1d ago•22 comments

Anthropic's proposed AI safety bill only kicks in if 50 deaths or $1B in damages

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89•f-serif•2h ago•93 comments

Lean now ships with verified kernels

https://leodemoura.github.io/blog/2026-10-15-lean-now-ships-with-verified-kernels/
179•matt_d•2d ago•62 comments

A History of Curves and Surfaces in Computer Aided Geometric Design [pdf]

https://math.pku.edu.cn/teachers/jiangm/courses/CG/Lectures/spline-history.pdf
24•mbustamanter•3d ago•3 comments

Dam removals are bringing fish back across the northeastern United States

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329•sohkamyung•1d ago•82 comments

Pele – Mermaid diagrams as themeable SVG

https://pele.run/
525•dchest•1d ago•50 comments

High performance policy routed IPsec mesh SD-WAN

https://ranet3.com/
5•StepBroBD•2h ago•1 comments

Chirp Pong – uses microphones and audio for networked game play

https://simonwillison.net/2026/Oct/15/chirp-pong/
16•havaloc•2d ago•8 comments

Furifont, a Japanese font that shows furigana

https://furifont.antfu.me/
387•plaguna•3d ago•81 comments

Lorenz and Little: How Much Does Your Tail Cost?

https://brooker.co.za/blog/2026/07/29/lorenz-and-little.html
25•porridgeraisin•3d ago•2 comments