All New Java Language Features Since Java 21
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All New Java Language Features Since Java 21
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Re: All New Java Language Features Since Java 21
#2[video]
Re: All New Java Language Features Since Java 21
#3Isn't there a textual version? Seems pretty inefficient to have a video that is basically a big list
Re: All New Java Language Features Since Java 21
#4I am a big functional programming geek. I am one of the few people on the planet who can honestly say I have been paid to write F#, Haskell, Clojure, and Erlang. I have spoken at FP conferences like six or seven times, and I have shit on Java for most of my career.
And yet, my latest talk at Lambda Days basically boiled down to “Java 21 and later don’t actually suck anymore”, and I genuinely do mean that.
Java 21 is actually fun to write, even for a grumpy FP advocate like me. Virtual threads make concurrency a lot simpler, and now that there’s proper records and ADTs (in the form of sealed interfaces), along with pattern matching, the language is actually pleasant to use. I haven’t dived into 25 yet, but I suspect I will like it as much or more than 21.
The biggest issue, though, is that Java programmers won’t use the new features. It was like pulling teeth at my last job to get people to use stuff from Java 8 (e.g. the `var` keyword), and none of my coworkers even knew how to use NIO or BlockingQueues which I think predate agriculture. I mean, hell, I had explain what “fairness” was to engineers when using a ReentrantLock because someone “corrected” my code with `synchronized`.
I don’t think Java makes people into bad programmers, but I do think it selection-biases for intellectually unambitious engineers. They learn exactly enough Java in college to pass their courses, and then get a job at a BigCo that doesn’t strictly require ever learning anything more than what they were taught in their “intro to data structures” course.
I have met some extremely intelligent Java engineers who do have intellectual curiosity, so I am not saying it affects everyone, but I do think that they are the minority. Java 25 might add every feature to make my wildest dream come true but it won’t matter if I am not allowed to use it.
Re: All New Java Language Features Since Java 21
#5I am a big functional programming geek. I am one of the few people on the planet who can honestly say I have been paid to write F#, Haskell, Clojure, and Erlang. I have spoken at FP conferences like six or seven times, and I have shit on Java for most of my career. And yet, my latest talk at Lambda Days basically boiled down to “Java 21 and later don’t actually suck anymore”, and I genuinely do mean that. Java 21 is…
What do you think of “modern” Javascript to write FP?
Re: All New Java Language Features Since Java 21
#6I am a big functional programming geek. I am one of the few people on the planet who can honestly say I have been paid to write F#, Haskell, Clojure, and Erlang. I have spoken at FP conferences like six or seven times, and I have shit on Java for most of my career. And yet, my latest talk at Lambda Days basically boiled down to “Java 21 and later don’t actually suck anymore”, and I genuinely do mean that. Java 21 is…
What do you think of “modern” Javascript to write FP?
I haven’t touched much modern JS. I have done some TypeScript in the last few years but of course that’s a transpiled thing. I think TS isn’t too bad to write functional stuff though I have no idea if people actually enjoy reading my code.
Re: All New Java Language Features Since Java 21
#7I am a big functional programming geek. I am one of the few people on the planet who can honestly say I have been paid to write F#, Haskell, Clojure, and Erlang. I have spoken at FP conferences like six or seven times, and I have shit on Java for most of my career. And yet, my latest talk at Lambda Days basically boiled down to “Java 21 and later don’t actually suck anymore”, and I genuinely do mean that. Java 21 is…
Programming language is a tool. Java developers value stability and ease of understanding for the code. I've seen the nice features you complain that don't get used, reality is that nobody wants to waste time knowing them unless they are intuitive to use. Especially when are forcing to use newer JDKs.
There is no value in solving a challenge in a way that only you understand or make others lose time trying to understand the logic.
Java 8 was the peak of development age for the JDK. Everything that came after isn't really memorable nor helpful, especially lambdas. You mention "var", why would we ever want in Java to hold a variable that you can't read immediately what is the type? That is a source of bugs and time waste to track down what object is being used.
I don't mind you are happy with all these changes, just remember that we absolutely don't care about them nor will make much of an effort because in the end of the day we don't want to follow the same route of other programming languages unable to handle gigantic and complex platform systems.
This isn't a competition to showoff who can apply new tricks, we absolutely don't care about functional programming. Java code must be simple and easy for anyone to read, that's it.
Re: All New Java Language Features Since Java 21
#8I am a big functional programming geek. I am one of the few people on the planet who can honestly say I have been paid to write F#, Haskell, Clojure, and Erlang. I have spoken at FP conferences like six or seven times, and I have shit on Java for most of my career. And yet, my latest talk at Lambda Days basically boiled down to “Java 21 and later don’t actually suck anymore”, and I genuinely do mean that. Java 21 is…
Programming language is a tool. Java developers value stability and ease of understanding for the code. I've seen the nice features you complain that don't get used, reality is that nobody wants to waste time knowing them unless they are intuitive to use. Especially when are forcing to use newer JDKs. There is no value in solving a challenge in a way that only you understand or make others lose time trying to underst…
> You mention "var", why would we ever want in Java to hold a variable that you can't read immediately what is the type?
var items = new HashMap();
Instead of
HashMap items = new HashMap();
That's the point of var. It reduces noise a lot in some situations.
Re: All New Java Language Features Since Java 21
#9I am a big functional programming geek. I am one of the few people on the planet who can honestly say I have been paid to write F#, Haskell, Clojure, and Erlang. I have spoken at FP conferences like six or seven times, and I have shit on Java for most of my career. And yet, my latest talk at Lambda Days basically boiled down to “Java 21 and later don’t actually suck anymore”, and I genuinely do mean that. Java 21 is…
Programming language is a tool. Java developers value stability and ease of understanding for the code. I've seen the nice features you complain that don't get used, reality is that nobody wants to waste time knowing them unless they are intuitive to use. Especially when are forcing to use newer JDKs. There is no value in solving a challenge in a way that only you understand or make others lose time trying to underst…
> You mention "var", why would we ever want in Java to hold a variable that you can't read immediately what is the type?
I've been a full time java developer for the past 7 years. Let me start by agreeing that I have very little interests in the functional "innovations" they added. They're fine, but most of my colleagues agree that code using streams or lambdas very quickly becomes harder to debug then if you just wrote the code with loops and.
That's far from true for every java feature though. Switch statements have been super cool, Green threads are a promising road out of the CompletionStage hell the children are dreaming of these days. "var" is a very nice way to reduce double typing ("Thing x = new Thing()" -> "var x = new Thing()") and also a nice way to avoid changes to unrelated files ("Thing x = getFoo(); f(x);" -> "var x = getFoo(); f(x)" means changing the name of class Thing doesn't require any change to the code) that's been helpful in a lot of cases.
Re: All New Java Language Features Since Java 21
#10I am a big functional programming geek. I am one of the few people on the planet who can honestly say I have been paid to write F#, Haskell, Clojure, and Erlang. I have spoken at FP conferences like six or seven times, and I have shit on Java for most of my career. And yet, my latest talk at Lambda Days basically boiled down to “Java 21 and later don’t actually suck anymore”, and I genuinely do mean that. Java 21 is…
I don’t use Java often, but many developers at my workplace do; they universally hate the new FP features.