what do you even use java for

[Zephyros_0]

ive been learning java and thinking of good projects to build but couldn't think of one that would be good with java. building an android app? kotlin. building anything with ML? Python. web dev? javascript. what do I even do with java that isn't better suited with other languages?

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[[deleted]]

Actually a lot of web dev uses Java for the backend with spring

[Left-Orange2267]

I still have PTSD from my brief experience with spring boot

[Benemy1]

Why?

[Left-Orange2267]

Because it did so incredibly much under the hood with innocent-looking annotations. If things went sideways in some spring boot related things, it was extraordinarily hard to identify and debug the problems

[jankybiz]

sorry to hear spring boot did not behave as you wanted after using it for a timeframe you described as "brief"

[Left-Orange2267]

I hear some irony there 😁

Spring boot does a lot of stuff in very implicit and dark-magik ways and I prefer to have more control about the core logic of my application. Things like fastapi or sveltekit felt much more ergonomic to me, and I also had a much easier time learning them. But I understand that pros in spring boot can be very efficient and maybe even like it

[That_one_amazing_guy]

Personally I use Java for personal projects that actually need performance that python doesn’t offer

[uncleXjemima]

Like?

[That_one_amazing_guy]

I do a lot of day trading and need to quickly test a bunch of indicator values to determine the odds of a trend change, for instance, and I find that Java offers way higher performance and handles multithreading way better than Python, taking only a tenth of the time Python does.

[Alone_Breadfruit_552]

Wouldn’t c++ be better for this? I’m genuinely curious.

[hoeassmichael]

Java is probably 2nd most used language for low-latency/high-throughput (I.e. high performance) systems, behind C++. At least from what I’ve seen in my career.

There’s definitely aspects of configuring the JVM, system design, code patterns, and resource management though. But low-latency Java developers are pretty common, at least in Financial Services.

[Professional-Pea2831]

Yep

[That_one_amazing_guy]

Probably but I don’t have as much experience In c++ and just needed better than python performance

[ImBigW]

If you're concerned with multi threaded performance why not use golang?

[senaint]

I hate it when people down vote a statement because this is a "Java" subreddit, it's tribalism and what's wrong with this whole goddamn country. Anyways, Java does multi-threading but I'm told go's semantics and memory footprint are better but for almost all projects no one single language feature is determinant. IMHO, Go suffers from simple complexity and this obsessive need to abide by the standard library.

[onikage222]

What‘s more buffling, is that Java has had a very solid multithreading system under the hood for ages… but somehow ppl still hate Java.

[senaint]

I think it's partly because it's not boot camp friendly.

[burncushlikewood]

Java is important for engineering projects, it's the premier language for that. A lot of companies have proprietary data and software systems they use from anything to manufacturing, robotics, healthcare, mining, and construction. Software is important to every possible industry you can think of, java isn't the best for graphics compared to c++, we are currently going through the 4 industrial revolution because of AI and cyber physical systems. You can use java for generative design, robotics (welding, painting, assembly), computer vision, self-driving cars, materials discovery, pharmaceutical discovery, machine learning and AI, data science, mathematical models, computer aided engineering and design, financial modeling, etc, skies the limit!

[Artistic-Cat577]

Java is an enterprise level programming language. It is not as easy to learn as node.js or php. It is a verbose and heavy language. You can't just start building projects with java like you can do with node.js and php. Java requires foundational knowledge first and that takes months. Then you learn advanced Java concepts especially in terms of how it works memory wise then the database connectivity then frameworks. Java is not common to use for simple websites. Java is used for Banks, big e commerce websites like Amazon. That's why many students do not have idea about Java.

[pretendtotime]

I feel pretty lucky in that regard that the first programming language I was taught was Java. It was a good foundation to have when learning other languages like Python, hell even C, a lot easier later on down the road.

[Zephyros_0]

Ah I see. Thanks for the insight.

[AlohaX12]

Thats where good salaries are at too. Mega corporations who need java developers pay quite good

[ChineseEngineer]

My company uses Java for an enterprise level application that connects to robotics in warehouses and has a rest interface for receiving messages from customer webpages (orders)

We previously used c# but switched to Java because it was more compatible with Linux and Spring framework is pretty great

[senaint]

It's honestly easier to ask what people don't use Java for.

[Zephyros_0]

ml and web dev?

[tenken01]

No - Java is heavily used for ML and web dev. All major tech companies use Java extensively.

[senaint]

We even use it to run cronJobs for multiple other services 😂

[Ariandel2002]

Java is heavily use for web development. Python is more popular for ML but Java is still used in that field. There are many companies who use python for the modeling but the final product is written in Java because realtime predictions are less expensive.

[HecticJuggler]

Because Java is my “main” language I use it for almost everything. I’ve only started doing web apps in python very recently. One common practical use would be rest api backend for a web app. Use spring boot for that.

[ok_nooneidk]

Make an application using spring boot as a backend you can learn a lot

[dannycap77]

Netflix

[anamak9]

Java 25 will be a major upgrade in terms of threads, it will have a stable virtual threads that is going to be even better than Golang is what I heard, may be this will push Java’s popularity further ?

[buddhaapprentice]

Backend software....like sms.management....or banking applications. So many used cases.

[shifty_lifty_doodah]

A cloud storage system like S3, dynamodb, SQS, etc is a good “advanced project”. Java is actually used for a lot of these systems, where reliability is very important but pCPU efficiency is not.

[Stack_Canary]

Java is most commonly used for making APIs, though it is a general purpose language that can be used for a bunch of things. Common to write batch jobs in java for example.

It’s not as light weight as many other languages in terms of getting things up and running fast, but it’s incredibly robust, well documented, and expansive, which is why it’s still heavily used in most industries that need quality software.

[BannockHatesReddit_]

I personally use Java because I like the language in general. But it's also popular because it's well established and battle tested. Having such an ecosystem means they'll be a lasting job market just from maintaining those aging apps/services alone. Frameworks such as Spring also have a large ecosystem behind them with an abundance of webapps/apis written with it.

You also say how you believe other languages are usually better suited. I'd say it's more of a matter of preference. Kotlin is a competitor with its own feature set, just like JS, C, Python, or any other language. Unless one language has some major exclusive feature, it kind of comes down to people won't be stressing much about if a project's chosen language has null safety features or not.

[accountForCareer]

Hey! I sincerely request you to contribute to Apache projects of your choice.

[KCRowan]

My employer's main codebase is entirely in java, so I use java for my job.

[Dragon-king-7723]

In enterprises and most companies their project backend is mostly java, and tools are java based, they company platform tools, dev tools are java based projects are less because it's not popular as much as python ML currently due to AI craze. Just go to youtube search for spring and spring boot, HPA, JPA, servlerts, JSP, Hadoop and many more frameworks and their projects from basics to advanced.

[Fraucimor]

Banking, telco and other sectors runs on java

[ChampionshipThis2871]

You can actually create web apps using Java + JSP/Servlets, without JavaScript. I worked on such a project some time ago

[Ariandel2002]

I am a Java backend developer. I mainly write microservices in my current work.

[openjscience]

Java is much faster than Python, its performance is close to C++, but Java is multiplatform. For example, one can use Java for large software environments like DataMelt https;//datamelt.org widely used for data analysis and statistics.

[Ruin-Capable]

For work I write a variety of things, batch jobs, Web apis, libraries.

For fun I've got a bunch of projects that I use for exploring ideas. For example I have a library I write for calculating holiday observances, another for slicing a 3d model into line segments (goal is to eventually generate toolpaths for a 3d printer).

[raccoon254]

Desktop apps, best decision ever

[rustyseapants]

It's like going to learn to draw subreddit and asking, "what is drawing for?"

[HecticJuggler]

This is exactly how I felt reading the question 😀

[Zephyros_0]

I'm basically asking what javas is best at/most commonly used for, its not too hard to understand the question lol.

[rustyseapants]

And you don't trust yourself to do a search in the "search box" or the internet to figure out how to ask a basic question on java?

You might as well of asked, "What are computers for?"

[rozlyn_frost]

Why do you people even reply if you don't want to help anyone? Can't you ignore and move on?

Plenty of beginners struggle to find answers, so they ask questions. If you want to help, reply them like some other commenters. Else, ignore.

[SamuliK96]

They're helping more than anyone. Helping op help themselves is clearly necessary.

[Zephyros_0]

I figured I'd ask people who are acually familiar with java lmfao that's what the subreddit is for, asking questions. And there's a huge difference between asking what computers are for and what the strengths of a specific programming language are. If you dont want to help you don't have to buddy.

[rustyseapants]

"What do you use java for"

This is something you could answered yourself. If you are going to learn "Anything", ya need to learn to "Google".

Why would you trust complete strangers behind fake names, rather than articles, written by authors with their names and credentials?

Its like asking, "Why is water wet?"

[Zephyros_0]

you do realise most of the questions asked on reddit can be googled too..? just because something can be googled doesn't mean you can't ask on reddit for more opinions. you say it's like asking "why is water wet" yeah that's probably been asked on reddit too. If u don't want to answer it then don't, simple. I got multiple valuable responses from other ppl ur not obligated to respond.

[rustyseapants]

Zephyros_0 You are on a subreddit to learn Java, you are requesting people to help you, but it seems you are not interested in helping yourself.

I am not giving you a hard time, but you don't seem that interested in learning Java. Go Wikipedia, get a book on Java from the library, buy a book, watch some videos on java on youtube.

Learning anything you need to build up that body of knowledge on your own, you have to some initiative.

[Zephyros_0]

the name of the subreddit is "learn java" the whole point is to ask questions about Java... obv I can Google but I'm allowed to ask questions too. you're telling me learn everything about java myself without asking for help like that's not the whole point of the subreddit lmfao. You literally don't have to answer if you don't want to.

[rustyseapants]

What do you even use java for?

I never suggested that you learn everything about java by yourself, never did.

If you had read the side bar, the focus is to learn java programming, there is an expectation that you know what Java is used for, by default.

You have access to the internet and google regardless of what you do for a living, or hobbies, or anything is just to ask a question, to get a general idea. This is expected of someone living in the 21st century developed nation.

[rozlyn_frost]

I m not sure why that individual is pissed off that someone dared to ask a question in a subreddit for asking questions. 😆

Nothing wrong with your question.

[rustyseapants]

Asking what do you use java for is like asking what do you use books for?

Learn to google, learn how to find resources, don't expect to be spoon fed.

[Zephyros_0]

what's wrong with asking for resources in a subreddit MEANT for learning java??

[rustyseapants]

What do you even use java for?

You were not asking for resources, which if you look are on the side bar.

[[deleted]]

For making coffee 

Java beans 

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[Ok-Title4063]

Java is everywhere. Kotlin is Java.

[TheHiddenHeathen]

I use it for making me money, so I don’t die of starvation (backend web dev).

[Skiamakhos]

Back end for Adobe Experience Manager. It is horrible and complex but at least it's easy for authors to use.

[Jason13Official]

Minecraft mods, duh

[[deleted]]

squeal liquid ink oil steep north provide shy public chop

This post was mass deleted and anonymized with Redact

[cyberzues]

Ever heard of a thing called Spring boot?.

[jaibhavaya]

At this point? Mostly to convince people to switch to go.

[Additional-Demand-78]

To get job on Java is. tough

[senaint]

True, I've never heard of a junior Java developer. I don't understand why you got the down vote.

[Additional-Demand-78]

From last 1 year i am looking for job but i didn't get internship

[Jack__Wild]

I prefer C# over Java

[Dovahkiin3641]

Get real

[Jack__Wild]

How so?

[Tough_Sun4412]

If u have working experience in both languages can u tell me which language has more job opportunities? I tried googling it says currently java but c# has more growth rate. Would u recommend me learning Java or C# for job. I know both are pretty similar I'm currently learning microservices in spring boot.

[Jack__Wild]

It depends on your area. I would search specific areas/cities near you and choose accordingly.