My inner mathematician respects Java. The first step in any problem is defining your universe
You may find JML interesting. https://www.openjml.org/
Forgot the JVM eating the entire machine’s RAM for breakfast
JVM is like a gas. It expands to fit it’s container, however large that is.
Hello World
30 minutes of boilerplate
writing imports
$ cat <<EOF > Hello.java public class Hello { public static void main(String args[]) { System.out.println("Hello world!"); } } EOF $ java Hello.java Hello world!ok
Python:
print("Hello world!")C:
#include <stdio.h> int main() { printf("Hello World!"); return(0); }EDIT: POSIX-compatible shell:
echo "Hello World!"PHP:
Hello World!Rust:
Still fighting the burrito check fil er
Python2 is only one character longer:
print “Hello world!”
And you get proper data types too.
Shell is only meant for duct tape scripts, you know to tie two regular compiled programs together
Welcome to java, we have a couple unconventional ways of doing things, but overall I’m like every other mainstream oo language.
People: AHH! Scary!
Welcome to python. your knowledge of me wont help you elsewhere as my syntax is purposefully obtuse and unique. Forget about semicolons, one missed space and your code is as worthless as you after learning this language.
People: Hello based department
Oh my god I got fucked by a python script once because of a single space. It took forever to figure out what went wrong
I refuse to code in Python without a really good IDE and linting like PyCharm. When using PyCharm it’s very rare I have issues like this, because it catches them in one way or another, but I notice it catches those kinds of issues a lot when I’m coding soooooooo…
I have also setup the IDE to specifically color code comments like
’ # End If and ’ # Next
in the same style as their beginning statements as I find it much easier to visually scam through code when they are present.
**kwargs“No, I don’t use type annotations because they don’t actually do anything. In fact I purposefully give this parameter different types for different behaviors. How is that confusing?”
Python has its drawbacks but it also has a pretty useful standard library so as a language for small scripts, one can do much worse
It is possible to dislike both. For me SmallTalk-like languages are peak. Message passing for life!
This is getting a little better nowadays.
> cat Hello.java void main() { System.out.println("Hello, World!"); } > java --enable-preview Hello.java Hello, World!Things to notice:
- No compilation step.
- No class declaration.
- Main method is not
public static - No
String[] args.
This still uses preview features though. However, like you demonstrated already, compilation is no longer a required step for simplistic programs like this.
System.base.stuff.output.out.printfunctions.println
Or so it felt every time you wanted to dump something into the console…
Main method is not public static
It must be somewhere under the hood. Otherwise, it wont be callable and it would require an instance of an object to call. Unless the object here is the Java environment?
No String[] args
They are just optional I’m sure, like C and C++. You still need them to read command line arguments.
All in all, these syntax improvements are welcome. I already moved on to Kotlin for Android development though.
Main method is not public static
It must be somewhere under the hood. Otherwise, it wont be callable and it would require an instance of an object to call. Unless the object here is the Java environment?
No. From JEP-445:
If an unnamed class has an instance main method rather than a static main method then launching it is equivalent to the following, which employs the existing anonymous class declaration construct:
new Object() { // the unnamed class's body }.main();No String[] args
They are just optional I’m sure, like C and C++. You still need them to read command line arguments.
Without the preview feature enabled, it is not an optional part of the method signature. It specifically looks for a
main(String[])signature.I am not in the mood to read a technical document, but I don’t think the resulting binary/byte code should be different between the two “hello world” programs. But then again, why not?
Without the preview feature enabled, it is not an optional part of the method signature. It specifically looks for a main(String[]) signature.
Ah ha! So that’s what’s going on here. They almost got it right. They had the potential to make a lot of the boilerplate optional or implicit under relevant circumstances, but instead the language has two explicit switchable modes.
Can I write a Java application in “preview feature”?
I mentioned this uses preview features twice in the first comment regarding this, so I don’t know why you’re "ah ha"ing. Also you don’t need to read the technical document, I’ve quoted the entirety of the relevant text. I provided it as a citation.
You seem confused about preview features. It’s not a switchable mode to reduce boiler plate. I find the name very clear, but here is more information. From JEP-12
A preview feature is a new feature of the Java language, Java Virtual Machine, or Java SE API that is fully specified, fully implemented, and yet impermanent. It is available in a JDK feature release to provoke developer feedback based on real world use; this may lead to it becoming permanent in a future Java SE Platform.
As an example, JDK 17 added pattern matching for switch statements as a preview, and by JDK 21 it was added as a full fledged feature that doesn’t require usage of the enable preview flag. Presumably in some future release of Java this feature will not require the usage of a flag.
It is pretty late for me. Sorry. And thank you for your patience. Repeating it three times helped.
I will be interesting to find out if the resulting binary is the same or not and what’s possible once it matured.
Yes, because it’s genuinely not a static method. It’s an instance method. Also the signature is different. It’s not some sort of mere syntactic trick that translates
void main()topublic static void main(String[] args).
Microsoft Java is a one-liner these days.
> cat program.cs Console.WriteLine("Hello, World!"); > dotnet run Hello, World!
He types REALLY slow.
I got the impression they skipped the hello world cause it was too easy and they wanted to get right to writing their app, so they moved on to more advanced stuff without having a real grasp of the basics
Java is terrible and I hated it but I feel like this stuff is not why, this mostly just seems like stuff that most powerful object oriented languages do.
Java is amazing and I love it, and I agree that this is not really a good list of problems. (Not that I expect green texts to be well thought out, rational, real, fair, or anything other than hyperbolic rants lol.) There are good reasons to critique it and the ways people use it, but this isn’t it.
Particularly funny is the one about race conditions. That’s something you’d have to deal with in any sort of multi threaded environment.
Maybe they got confused and assumed it would run on a different cpu? Is there another language that does it that way? No, now I’m confusing myself.
Various languages have various features to make multi threading/concurrent programming easier. Without knowing what language the green text is fanboying for instead of Java it’s hard to know what their specific gripe is. Supporting true multi threading out of the box has always been a priority of Java so I don’t know what they’re complaining about. Generally languages that people praise over Java like Python and JavaScript do not feature true multi threading. (Although Python is getting closer or there now that the GIL is optional.)
I really enjoyed the text.
From the perspective of a python programmer it all seems valid.
A Java-Dev would probably write the same about an embedded engineer.
As embedded dev, the stack trace alone scares me. It would be funny to watch the Java runtime blow the 8 frame deep stack on a PIC18 tho
Honestly, I prefer C to Java, it’s incredibly simple without all the BS that Java throws at you:
- interfaces - compiler will fail if you provide the wrong types; w/ Java, figuring out what types to pass is an effort unto itself
- functions - everything needs to be in a class; even callback functions are wrapped in a class (behind the scenes if you use modern Java); in C, you just pass a function
- performance - Java uses a stop the world GC, which can cause issues if you have enough data churn; in C, you decide when/if you want to allocate or free memory, no surprises
There are certainly some bad parts, but all in all, when I run into an issue in C, I know it’s my fault, whereas in Java, there are a million reasons why my assumptions could be considered valid, and I have to dig around the docs to find that one sentence that tells me where I went wrong w/ the stuff I chose.
That said, I prefer Rust to both because:
- get fancy stack traces like I do in Java (I really miss stack traces in C)
- compiler catches most of my stupid mistakes, Java will just throw exceptions
- still no stupid interface hell, I just satisfy a specific trait and we’re good
- generally pretty concise for what it is; I can rarely point to a piece of syntax and say it’s unnecessary
I use:
- Python - scripting and small projects
- Rust - serious projects or things that need to be fast
- Go - relatively simple IO-heavy projects that need to be pretty fast
- C - embedded stuff where I don’t want to mess w/ the Rust toolchain
Java has been absent from my toolbox for well over a decade, and I actively avoid it to this day because it causes me to break out in hives.
Sorry, you had a small error in the spacings of your post; Therefore I cannot parse a thing you’re saying. Didn’t mean to scare you with a semicolon either. It’s just a tool in language’s to end a clause and begin a related, independent clause. That could be useful somewhere…
I still think Java is good for teaching newbies precisely because it will throw an error quickly if they are doing it wrong.
Rust over there like
Hey kid, tired of putting off your problems?
So will so many better languages, more so actually.
So will pretty much anything except JS.
Arguably there’s Typescript now, too.
Must be several years old - otherwise, javafx deserves quite a bit more ire.
Could be worse, could be programming Javascript (or Typescript).
An text file with a <script> block and nothing else, containing a console log, is all you need. You already have all the boilerplate to run it in any computer. No extra dependencies, no installing anything. Literally just a notes editor app. This is a valid HTML file:
<script> console.log("Hello World") </script>I think you forgot to pollyfill your console.log and now you have some error in some script in some callback
I love javascript. Shit. Just. Works.
Even if you, the programmer, are a complete fucking moron, by god javascript will try to make your program run as long as possible.
Javascript is a beautiful language where ‘3’ - 1 = 2 but ‘3’ + 1 = ‘31’.
Even if you, the programmer, are a complete fucking moron, by god javascript will try to make your program run as long as possible.
I mean it might not work as intended but it’ll run and not complain!
god damn right
I might have agreed a decade or two ago, when I knew no better. But today, I find the tribalism surrounding programming languages comical.
I don’t particularly like Java, but I use it because it pays the bills. Similarly, I use C++ (which I prefer) when my work requires it.
I don’t particularly like Java, but I use it because it pays the bills. Similarly, I use C++ (which I prefer) when my work requires it.
I mean, anon is not arguing against that. They’re saying the language is shit regardless of how much it is used in business. I don’t think they are entirely wrong.
Tell us more ancient one, your heroic tale of “giving up against the endless weight of capitalism” is fascinating.
“giving up against the endless weight of capitalism”
We just call it “having a job” nowadays
Lol I always forget how conservative software devs are, oop
Love the dramatics.
This ancient one has learned the art of pragmatism. A little time in the trenches of enterprise development can do that – turn passionate ideals into practical choices.
Some days it’s C++, some days it’s Java, Python and so on. In the end, the code compiles, and the ancient one get paid.
Dramatics are my main form of communication so thank you for your appreciation
I’m sure that’s Fireship, without clicking the link.
Nah it’s not you should check it out
You made me expect a Rickroll
All I hear is I brightened someone’s day ;)
My experience with Java over the last 2 decades or so. Shame Android gave it extra life, thankfully Kotlin exists now.
Yup, I swore off Android dev almost entirely because of Java, and then Kotlin came out and Android programming was tolerable again. Not fun, tolerable, lipstick can only make a pig so appealing…
If it took anon 30 minutes to write hello world in java, programming is not for anon.
We bow to your wisdom, wise gatekeeper
It’s like 5 lines of trivial code
Some of us try to understand what we’re doing, rather than just copy/paste. It’s easy to discount how difficult learning the basics of something is when you’re already past it.
And most IDEs will autogenerate it for you.
That said, I think it highlights everything I hate about Java:
public class MyClass {
Why does it need to be a class? I’m not constructing anything?
public static void main(String[] args) {
Why is this a method? It should be a top-level function. Also, in most cases, I don’t care about the arguments, so those should be left out.
System.out.println(“Hello world!”);
Excuse me, what? Where did System come from, and why does it have an “out” static member? Also, how would I format it if I felt so inclined? So many questions.
And here are examples from languages I prefer:
C:
#include “stdio.h”
Ok, makes sense, I start with nothing.
int main() {
Makes sense that we’d have an entrypoint.
printf(“Hello world”);
Again, pretty simple.
Python:
print(“Hello world”)
Ok, Python cheats.
Rust:
fn main() {
Ooh, entrypoint.
println!(“Hello world”);
I have to understand macros enough to realize this is special, but that’s it.
In C, Python, and Rust, complexity starts later, whereas Java shoves it down your throat.
Thank you. If you bothered to read a 5 minutes tutorial instead of posting to 4chan, you could also reach this level of knowledge.
Don’t be mad, you’re the one that commented lol. It’s like you’re choosing to be upset
I thanked you for your reply and suggested reading a tutorial. How does that make me mad and upset? You’re acting weird.
I also think Java is shit, but if you manage to get a NullPointerException while writing a hello world program, maybe anon is just not cut out for computers?
I always loved that Java has a NullPointerException but doesn’t have the concept of pointers in the language (only references).
That is because they planed to add pointers and then gave up.
I can’t tell if you are making a joke but I can believe it could happen if it’s Java
I mean… they have them. And
unsafe. You’re just not supposed to use them
C# has
NullReferenceExceptionand it actually makes sense.
C# masterrace and I’m tired of pretending it’s not
After close to two decades of programming, C# is still the best language I’ve used. While some of the newer features seem a bit weird, I’d say it’s one of the few languages that has never got in the way and has just let me write code that made sense. Even with all the improvements Java has made over the years it’s still nowhere near as good as what C# was like maybe 15 years ago.
The same goes for everyone’s other “fav” language, Python. Ruby has been a better beginner scripting language than Python for many years, and while Rails is definitely a ghetto, as a language Ruby is great at teaching great programming fundamentals.
C# is pretty good generally - I know it far better than any other and it pays my bills! - but it certainly has its weak points. Particularly around the newer features, a lot of them feel really rushed and just kind of shitty.
The one I hate the most is the whole “nullable” pattern. It’s a total mess. Having to mark up files as
nullable enable, having to mark methods with a bunch of attributes, and the way that it works differently if it’s a value type or a reference type, it’s just so half-baked.If you spend some time with a more modern language like Rust or Swift then you’ll quickly start to notice C#’s weaknesses.
I feel like you’re doing something wrong with the nullables… I’m pretty sure you don’t need to mark up files, you can just enable it on the whole project? I’m not sure about the attributes, you might have a point there, but it just makes sense for value vs reference types IMO, since value types are already implicitly different in terms of nullability.
But yeah, I can imagine it’s half-baked, since nullable reference types (that’s the name, previously reference types were just nullable by default with no extra features) are a more recent addition to the language, one that wasn’t built with them in mind.
If you create a new project from scratch, yes, you can enable it project-wide. If you have a project which has a bunch of code predates nullable reference types, and you enable it project wide, you’ll have a billion warnings about it. Also, they’re warnings and not errors by default, which just encourages developers to either ignore or suppress them.
So the reality is that you need to remember when you’re making new classes to add the attribute, and then deal with external stuff - which isn’t always clearly marked whether it’s nullable or not unless it’s using attributes, by the way… just such a total mess.
They should have just gone with something more like Rust’s “Option” type. Would have been clearer for codebases that have to deal with a mix. They also could have clearly and decisively deprecated non-nullable reference types and just told people they were going to remove support in some future version so we could all migrate to them properly like we’ve done for .NET Core/.NET 5+.
C# has had string interpolation for, what - nearly a decade, now? It arrived with C# v6, which was released in 2015.
Meanwhile Java just pulled their implementation out of the latest beta earlier this year because they couldn’t get it to work right.
Don’t know about you, but I think that Java is largely resting on its laurels as of late. That the only real reason to go for it is it’s third-party library system, and not much more.
C# is nicer Java, but I think it’s still fundamentally a poor language.
Rust master race:
fn main() { println!("Hello world!"); }Unfortunately, the time you save typing you’ll spend compiling, so there’s that…
Not using Eclipse helps. Using Scala helps even more
Really want to go to La Scala one day but I looked it up and the tickets are like 500 euros. An eclipse is much cheaper
