Hacker News Board Hacker News, browsed like a classic message board
Live data from Hacker News

Java 12

jdk.java.net

Post reply on HN
Print view View original

221–230 of 478 posts

Re: Java 12

#221

Post by spricket »

melling wrote: post #11
_old_dude_ wrote: post #8

Earlier quoted context omitted.

or using the switch as an expression System.out.println(switch(day) { case MONDAY, FRIDAY, SUNDAY -> 6; case TUESDAY -> 7; case THURSDAY, SATURDAY -> 8; case WEDNESDAY -> 9; });

That's much nicer. Anything else added to Java recently to reduce the boilerplate? I haven't used Java much in 5-6 years. Glad they are iterating faster.

As another poster mentioned, the new type inference is great. So is lambda support. Another is Lombok.... Yeah it's not official but we use it literally everywhere and it helps a ton with data classes especially.

Nullaway and a bunch of other linters will also save you from accidentally falling in one of the dusty corners.

RxJava and Java Streams are also very nice.

Anonymous classes are nice too I guess (although they're fairly limited).

Overall the java experience has improved massively in the last 5 years, but you need to know where to look. Highly recommend the two popular "awesome java" repos on GitHub for an overview

Re: Java 12

#222

Post by jacques_chester »

spricket wrote: post #147
ilovecaching wrote: post #22

I understand why Java has to keep on chugging along, but I feel bad for the people that have to be a part of it. It's like watching people keep coal trains going while people are moving to cars. Why? Besides being owned by Oracle, which is enough of a reason to never use Java ever again, it's also lost the niches that brought it into existence. Java no longer runs everywhere. Java on the web is dead, and you can now…

I'm not sure if you're trolling so I'll try to keep this short. Java is old, it's crufty. Yes. But it's extremely fast compared to anything but Go, C#, and "low level" languages nobody wants to touch for web stuff. The JVM is also extremely reliable. I've seen apps run for years straight. And the tooling is better than basically anything. Profiling, debugging, realtime code generation and modification. Libraries for…

I mostly agree, except:

> But Spring is dated and not often used for new projects.

Spring Initialzr (https://start.spring.io) is used millions of times per year.

Re: Java 12

#223

Post by spricket »

MarkMc wrote: post #214

I'm so glad I was taught Java at Macquarie University back in 1998. For the past 20 years I've had a career built on a solid API that doesn't change every 2 years like some flavour-of-the-month Javascript framework. Even on the client where Java has lost to Javascript, I'm finding it more enjoyable to add features to my 15-year-old SWT app [0] rather than dealing with the multiple layers of abstractions that is Javas…

One of my Java guilty pleasures is pulling in some 14 year old library and it just works. Absolute gold for a company with a lotta old code sitting around.

I also do a good bit of frontend and holy crap it's exhausting. That's the main reason I push hard for Java backend. Backends tend to stick around about a decade longer than you would like, while front end code is due for a rewrite every 3 years

Re: Java 12

#224

Post by tambourine_man »

_bxg1 wrote: post #27
azhenley wrote: post #6

The most interesting new feature I think is the Shenandoah GC. The summary from [1]: "Add a new garbage collection (GC) algorithm named Shenandoah which reduces GC pause times by doing evacuation work concurrently with the running Java threads. Pause times with Shenandoah are independent of heap size, meaning you will have the same consistent pause times whether your heap is 200 MB or 200 GB." The original algorithm…

GC pauses have been one of the major barriers to using garbage collected (read: higher-level) languages for game development. This could open up the JVM for games, which could have some exciting implications.

>GC pauses have been one of the major barriers to using garbage collected (read: higher-level) languages

There is such a thing as reference counting :)

Re: Java 12

#225

Post by jacques_chester »

spricket wrote: post #221
melling wrote: post #11

Earlier quoted context omitted.

That's much nicer. Anything else added to Java recently to reduce the boilerplate? I haven't used Java much in 5-6 years. Glad they are iterating faster.

As another poster mentioned, the new type inference is great. So is lambda support. Another is Lombok.... Yeah it's not official but we use it literally everywhere and it helps a ton with data classes especially. Nullaway and a bunch of other linters will also save you from accidentally falling in one of the dusty corners. RxJava and Java Streams are also very nice. Anonymous classes are nice too I guess (although th…

The .parallel() method in Java Streams is basically one of my favourite magic spells ever.

Re: Java 12

#226

Post by spricket »

jacques_chester wrote: post #225
spricket wrote: post #221

Earlier quoted context omitted.

As another poster mentioned, the new type inference is great. So is lambda support. Another is Lombok.... Yeah it's not official but we use it literally everywhere and it helps a ton with data classes especially. Nullaway and a bunch of other linters will also save you from accidentally falling in one of the dusty corners. RxJava and Java Streams are also very nice. Anonymous classes are nice too I guess (although th…

The .parallel() method in Java Streams is basically one of my favourite magic spells ever.

Ah yes, parallel stream(), for when you need to filter a list of 13000 entries for.... Reasons. Bad reasons.

Use it all the time :)

Re: Java 12

#227

Post by spricket »

jason0597 wrote: post #17
darksaints wrote: post #10

Anybody know how the graal project ties in with all of this? Is oracle effectively developing 3 different JVMs (OpenJDK, Oracle JDK, GraalVM)? Or is there some sort of convergence plan? From what I understand, graal has made a lot of headway with language interop, as well as a handful of specific memory optimizations and native compilation, but overall is lagging in pure throughput/latency performance behind hotspot.…

Well the relationship between OpenJDK and Oracle JDK is that OpenJDK is the FOSS base and Oracle JDK is the proprietary structure built on top, kinda like Chromium and Chrome As for GraalVM, I don't think it's meant to be mixed in with those 2 at all. From their website ( https://www.graalvm.org/ ), it sounds to me as if it's a completely different project that shares none of the goals the other 2 JDKs have: > GraalV…

Notably, Graal has been used extensively by TruffleRuby for a while now. It's not oficially ready for prime time but definitely promising.

Re: Java 12

#228

Post by throwawayEntDev »

iGoog wrote: post #168
wongarsu wrote: post #60

Earlier quoted context omitted.

All of those points are also true for C#, which imho fixes a lot of Java's problems and is a much nicer language. With .Net Core maturing you even get the "runs everywhere" factor (at least everywhere you care about, i.e. Win+Linux+Mac), and Microsoft is a much better vendor than Oracle.

I gotta ask what in particular "problems" C# solves over Java, and I'm not talking about J2SE 1.4. Having dipped into C#, it feels like the designers resented OOP and reusable code. C# is not the new kid on the block and is almost 20 years old now.

Over that 20 years, C# has been continuously improved with language features added at a faster rate than Java. Some examples: * properties * LINQ * async/await * dynamic types * better generics * inferred typing - `var` * null conditional operators * custom iterators - `yield` * pattern matching

Also, .net is more of a “pit of success” language — Java with all its legacy baggage requires a lot more knowledge to avoid mistakes.

Re: Java 12

#229

Post by spricket »

geophile wrote: post #15

Are they ever going to release value types?

I share your frustration but this new GC should drastically reduce the issues with creating tons of garbage. There's still the infamous "allocation wall" but value types wouldn't solve that either. But they would make it a lot better

Re: Java 12

#230

Post by jacques_chester »

spricket wrote: post #226
jacques_chester wrote: post #225

Earlier quoted context omitted.

The .parallel() method in Java Streams is basically one of my favourite magic spells ever.

Ah yes, parallel stream(), for when you need to filter a list of 13000 entries for.... Reasons. Bad reasons. Use it all the time :)

I tried it once on a simple monte carlo thingy and legitimately said "wow!" out loud when it just worked.

God, all the fussing with threads and fork-joins and mapreduces and god knows what everyone else wanted me to do: gone. Gone!

Post reply on HN