{"id":1060,"date":"2025-08-11T22:41:01","date_gmt":"2025-08-12T02:41:01","guid":{"rendered":"https:\/\/efsavage.com\/blog\/?p=1060"},"modified":"2025-08-11T22:41:18","modified_gmt":"2025-08-12T02:41:18","slug":"java-15-though-25-catchup","status":"publish","type":"post","link":"https:\/\/efsavage.com\/blog\/posts\/java-15-though-25-catchup\/","title":{"rendered":"Java 15 though 25 Catchup"},"content":{"rendered":"\n

Continuing my previous post<\/a>, let’s pick up the Java story where we left off…<\/p>\n\n\n\n

Java 15 (Sept 2020)<\/h2>\n\n\n\n

Sealed Classes<\/h3>\n\n\n\n

A nice organizational tool. Not very handy for my personal projects but definitely useful across a large org.<\/p>\n\n\n\n

Java 16 (March 2021)<\/h2>\n\n\n\n

Stream.toList()<\/h3>\n\n\n\n

Not much else in this release besides this minor but more readable improvement.<\/p>\n\n\n\n

Java 17 (Sept 2021, LTS)<\/h2>\n\n\n\n

Nothing really new here just polish and finalizing things. It looks like this might be the dominant stable version in many enterprises and the baseline for open source right now.<\/p>\n\n\n\n

Java 18 (March 2022)<\/h2>\n\n\n\n

Simple Web Server<\/h3>\n\n\n\n

This might be very useful for my prototypes. It wasn’t hard to do before but if this works with whatever is a good basic HTTP\/API framework these days then it’s great that it’s built-in.<\/p>\n\n\n\n

@snippet in Javadoc<\/h3>\n\n\n\n

I do actually comment my personal code fairly well (if I’m submitting it, even to a private repo) so this seems nice.<\/p>\n\n\n\n

Java 19 (Sept 2022)<\/h2>\n\n\n\n

Record Patterns<\/h3>\n\n\n\n

I’m only reading some examples of this and definitely want to try it but it seems like it could be pretty clean. It’s kind of like Go interfaces, which I’m a fan of (though I wish they had a different name since they’re flipped backwards in some regards to older language’s interfaces).<\/p>\n\n\n\n

Virtual Threads<\/h3>\n\n\n\n

Very interesting. I do tend to do a lot of concurrency in my projects so I’m definitely going to be spending some time with this one.<\/p>\n\n\n\n

Java 20 (March 2023)<\/h2>\n\n\n\n

Scoped Values<\/h3>\n\n\n\n

ThreadLocals aren’t difficult per se<\/em> but they are weird and easy to misuse. Streamlining the easiest usages of them seems like a win.<\/p>\n\n\n\n

Java 21 (Sept 2023, LTS)<\/h2>\n\n\n\n

String Templates<\/h3>\n\n\n\n

This syntax seems like it might be a little too<\/em> streamlined for readability, especially on review, but that seems solvable with tools so I’ll wait and see if I like these.<\/p>\n\n\n\n

Structured Concurrency<\/h3>\n\n\n\n

I’ve rolled my own versions of this very useful concept many times so it would be great if this could standardize that.<\/p>\n\n\n\n

Sequenced Collections<\/h3>\n\n\n\n

On the one hand this seems like a nice taxonomic update, but it also seems like it could be easily confused with Sorted Collections<\/em>, but maybe that’s just me.<\/p>\n\n\n\n

Java 22 (March 2024)<\/h2>\n\n\n\n

Statements before super(\u2026) \/ this(\u2026) in constructors<\/h3>\n\n\n\n

Ooh, this seems like it’s a bigger change than it appears on the surface. I have vague recollections of some significant class-layout workarounds for this limitation, but I’m also getting a Chesterton’s Fence<\/a> vibe here in why this limitation existed in the first place.<\/p>\n\n\n\n

Stream Gatherers<\/h3>\n\n\n\n

A few projects in my queue are data\/statistics-based so this might come in handy, if third-party libraries don’t already handle this well enough.<\/p>\n\n\n\n

Java 23 (Sept 2024)<\/h2>\n\n\n\n

Implicit classes & instance main<\/h3>\n\n\n\n

I never really had any issues with this boilerplate because the IDE always wrote it and it never really changed after that, but it’s cool that it got streamlined.<\/p>\n\n\n\n

Java 24 (March, 2025)<\/h2>\n\n\n\n

Key Derivation Function API<\/h3>\n\n\n\n

Figuring out how to get signed APIs working almost always feels like it’s harder than it should be, so I’m all in favor of standardizing it. I’m not sure what the long-term impact is here because I’m sure the next great crypto approach will have some structural reason you can’t use this…<\/p>\n\n\n\n

Java 25 (September 2025?, LTS)<\/h2>\n\n\n\n

The next LTS, nothing really major on the menu but a number of finalizations which will be nice.<\/p>\n\n\n\n

Final Thoughts<\/h2>\n\n\n\n

I started this mini research project thinking there were going to be more things like lambdas which I thought were going to maybe<\/em> take the language away from what I always liked about it, but that definitely doesn’t seem to be the case. There are a ton of streamlined features that work well within the same mental model and “spirit” of the language. I’m really looking forward to digging in and using almost all of them.<\/p>\n","protected":false},"excerpt":{"rendered":"

Continuing my previous post, let’s pick up the Java story where we left off… Java 15 (Sept 2020) Sealed Classes A nice organizational tool. Not very handy for my personal projects but definitely useful across a large org. Java 16 (March 2021) Stream.toList() Not much else in this release besides this minor but more readable… <\/p>\n

Continue reading Java 15 though 25 Catchup<\/span> →<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[88],"tags":[376],"series":[],"class_list":["post-1060","post","type-post","status-publish","format-standard","hentry","category-programming","tag-java"],"jetpack_featured_media_url":"","jetpack_shortlink":"https:\/\/wp.me\/p1AkJt-h6","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/efsavage.com\/blog\/wp-json\/wp\/v2\/posts\/1060","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/efsavage.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/efsavage.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/efsavage.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/efsavage.com\/blog\/wp-json\/wp\/v2\/comments?post=1060"}],"version-history":[{"count":4,"href":"https:\/\/efsavage.com\/blog\/wp-json\/wp\/v2\/posts\/1060\/revisions"}],"predecessor-version":[{"id":1066,"href":"https:\/\/efsavage.com\/blog\/wp-json\/wp\/v2\/posts\/1060\/revisions\/1066"}],"wp:attachment":[{"href":"https:\/\/efsavage.com\/blog\/wp-json\/wp\/v2\/media?parent=1060"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/efsavage.com\/blog\/wp-json\/wp\/v2\/categories?post=1060"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/efsavage.com\/blog\/wp-json\/wp\/v2\/tags?post=1060"},{"taxonomy":"series","embeddable":true,"href":"https:\/\/efsavage.com\/blog\/wp-json\/wp\/v2\/series?post=1060"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}