31–40 of 185 posts
Really cool, shame that strings can’t be fully indistinguishable like Integer despite their immutability
As a layman I would assume nothing is preventing it, other than the large amount of effort it would take to implement.
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The way pull requests and commits work in the OpenJDK repository -- a bot squashes each pull request into one commit: https://github.com/openjdk/jdk/pull/31120#issuecomment-51378... The final singular commit is cc278db (8389219: Implement JEP 401: Value Objects (Preview), 2026-07-31) https://github.com/openjdk/jdk/commit/cc278dbb8a1ca0754d5842...
Is there a writeup on why they choose to destroy the history?
It's pretty interesting that while both languages still receive new features, Java seems to stay ahead of JavaScript: - Java has long had a modern replacement for Date, while JavaScript's recently standardized Temporal API still isn't supported in Safari. - Java has switch expressions, while JavaScript, despite its Scheme influence, does not. - And now Java is getting value objects, while JavaScript's equivalent tupl…
Really cool, shame that strings can’t be fully indistinguishable like Integer despite their immutability
Is there a theoretical reason why they can’t? As a layman I would assume nothing is preventing it, other than the large amount of effort it would take to implement.
Earlier quoted context omitted.
Unless CPU instructions become widespread that allow to process 128 bits in one step, then yes. Java will have the same limitations as any other language. Other languages simply don't make this explicit.
We've had MMX for a while now, I don't think we need to wait much longer. I don't really see why you would need specific hardware to express a type in a programming language, though.
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Of particular note, all 1-byte Integers are interned, there is a pool of small Integers from -127 127 which are reused whenever possible. I learned this the hard way, when a C++ JNI extension I was working on accidentally overwrote the pooled value for zero, and all hell broke loose...
> Integers from -127 127 The cache can be extended on startup with env var `java.lang.Integer.IntegerCache.high ` https://github.com/openjdk/jdk/blob/cc278dbb8a1ca0754d584270...
It's pretty interesting that while both languages still receive new features, Java seems to stay ahead of JavaScript: - Java has long had a modern replacement for Date, while JavaScript's recently standardized Temporal API still isn't supported in Safari. - Java has switch expressions, while JavaScript, despite its Scheme influence, does not. - And now Java is getting value objects, while JavaScript's equivalent tupl…
I've been annoyed too by the lack of Temporal support in Safari. It's supposedly behind a --useTemporal flag, but I've never been able to get flags to work even when launching the binary directly, and I can't find anything in developer options or feature flags settings either so like. Does it even exist at all??
Note Temporal was in the Ecmascript 2026 release back in March.
Earlier quoted context omitted.
Unless CPU instructions become widespread that allow to process 128 bits in one step, then yes. Java will have the same limitations as any other language. Other languages simply don't make this explicit.
I don’t understand this comment - the .NET CLR supports arbitrarily large value types. Are you referring to something like “atomic flattening of those types” instead? Because the CLR doesn’t guarantee that, and therefore supports flattening.
Basically JEP401 guarantees that just adding "value" to the class won't change behaviour, which also means that you are not allowed to see object tearing, which requires atomic operations on the field.
Relaxing that would break safe publication rules, at least for Java.
I feel lonely in that: I mostly love Java as a language. The lack of value types is the biggest impediment to certain types of performance. I am really looking forward to this evolution of the language.
the problem with it is entirely cultural. why is `IStatusChangeEntityCreationManagerFactory` everywhere?
and why are the frameworks so huge and all encompassing? i think batteries included rails-style frameworks are great, but when i wrote Java, it didn't feel like rails at all
none of these are language problems
It's pretty interesting that while both languages still receive new features, Java seems to stay ahead of JavaScript: - Java has long had a modern replacement for Date, while JavaScript's recently standardized Temporal API still isn't supported in Safari. - Java has switch expressions, while JavaScript, despite its Scheme influence, does not. - And now Java is getting value objects, while JavaScript's equivalent tupl…