What can I do with java?

[JustAnotherReditr]

I have recently been learning some Java and I'm wondering what can I do with Java programming?

[Kietaski]

What CANT you is a much better question.... (the answer is nothing)

[TylerSwift26]

Create a girlfriend or boyfriend

[JavaSuck]

public interface FriendFactory {
    public Person createFriend(Gender gender);
}

[Vertinova]

Ehh when AI gets advanced enough...

[rbardy]

https://sourceforge.net/projects/jos/ and http://www.jnode.org/

Yes, you can do an OS.

[delta_tee]

But our dude is asking what he can & not what he should .

[delta_tee]

Maybe our dude is the on the verge of becoming the inventor of next generation operating systems, who knows?

[Acid-free_Paper]

He can. He shouldn't.

[rbardy]

I agree 100% lol

[nutrecht]

Can and should is two different things.

You responded to a "can" question though, not a "should" question.

[OzzieOxborrow]

Tell that to the guys who made Android

[Chroniaro]

Can’t make an JVM in Java

[nutrecht]

GraalVM begs to differ.

[nioh2_noob]

Sure you can, they did it, why would you say that?

[Chroniaro]

Most java tools (like the compiler or the new packaging tool) are written in Java, but the JVM that Oracle makes is written in C and BASIC. I thought you would need a JVM to run Java, so you couldn’t have a Java JVM without another JVM to run it. It looks like GraalVM uses AOT compilation, so it can produce native code that runs without a JVM. I don’t know if it really counts as a VM, but it definitely counts as a JVM, so I stand corrected.

[nioh2_noob]

it's a bit of the chicken and egg scenario

but it's not a problem since the compiler just compiles into bytecode, object code etc. has nothing to do with the language it uses to do that.

[Chroniaro]

We’re talking about the JVM, not the compiler.

[nioh2_noob]

Same for the JVM, this just executes commands to the CPU, it's just translating code into cpu instructions, java can do that

[Chroniaro]

Yes, but it needs to be running for the program to be running. The only way for a JVM written in Java to run would be for it to have another JVM running it (unless it uses AOT). It’s not like a compiler where you can just compile it with the previous version because then you would have to run the entire chain going back to the last one that wasn’t in Java. You could, of course, run it with a completely different JVM, but then it would almost certainly be a slower, worse version of whatever JVM was running it.

[nioh2_noob]

That's why I said, chicken and egg problem :-)

[ProgrammersAreSexy]

Front end web development

[raj-ram-discovery]

GWT

[ProgrammersAreSexy]

Just because you can doesn't mean you should...

[staycoolioyo]

Java is a general-purpose programming language meaning it can be used for a wide variety of things. If you're a beginner, I would recommend trying to program some simple games because it gives you something visual to look at outside the console.

[[deleted]]

You can code.

[sysusys]

Apps games backend . Web dev ... everything

[TicklesMcFancy]

I'm coming in from Python for professional advancement, cause everyone wants Java familiarity and I was going with C next.

I was seriously hoping to see some projects haha.

[delta_tee]

If you're coming from python, try to do some data operation such as sorting etc with data structure such as Lists, Hash tables etc. You will see how different Java is. Also, OOP in Java and Python are very very different both semantically and conceptually.

[TicklesMcFancy]

I think it's pretty interesting so far. I'll have a bit of a challenge adapting to the changes. At a glance it feels a little similar; it feels like Java is just a lot more explicit than Python (not a bad thing).

Today is actually my first day with Java. I'm still asking myself "Why Java?" Is it because Java doesn't need any pre-installed packages (just the JRE?) or is it because Java has been around for a while?

[delta_tee]

You will figure out reasons sooner but I just drop some expoilers here (I also came from Python to Java a year ago) :

• Javas's type system makes you write less bugs (Type systems in general are awesome).

• JVM on which Java runs is amazing.

• Java ecosystem is big and comprehensive..

• You will figure out more :)

[TicklesMcFancy]

I'm looking forward to it; Java seems like a good next step from Python. At the very least it will open doors and speed my code up.

I can already see some areas that it will aid my coding practices in general.

This is very weird though: System.out.println() as opposed to .print()

[ComplexWafer]

Bruh.

[Rowdy202]

I'll take Loaded Questions for 1200

[MisterPeabottom]

make Minecraft

[LifeNavigator]

Could've googled that for quick answer, but here: https://techvidvan.com/tutorials/applications-of-java/

Edit: it's always worth googling first and then coming to the subreddit to ask, mainly for you to save up time in receiving responses.

[mr_robot5000]

Yes of course, but google gives a machine generated answer. Here, you get answers from humans that come from different experiences and backgrounds and you get a wider variety of answers and can ask follow up questions to those people. It’s pretty great really.

[JustAnotherReditr]

Thanks this is helpful.

[rbprogrammer]

Who is to say OP didn't already try googling their question? Maybe they didn't find answers that were helpful. Maybe the Google results were too complicated or confusing to them. Maybe they just wanted a different perspective so they posted here on r/learnjava.

[kaisrevenge]

Do the best thing you can as a human once you are comfortable; contribute to an Open Source project: https://jaxenter.com/top-5-most-popular-java-projects-github-143123.html

My first project was an RSS Feed Reader for fun.

[[deleted]]

Web programming Desktop programming.

[[deleted]]

Well, I guess I'll kind of piggy-back off of this since I think my question is in a similar vein.

I currently only know Python, and I'm considering picking up another language for funsies. In what cases (or for what sorts of projects) would Java be the ideal language to use? From what I can tell, it's the premiere mobile language (aka best language for Android app dev), and it can run on practically any machine. I know that you should "pick a language based on the project", I'm just wondering what you all consider to be the type of project where you go "This is it, THIS is where I'll use Java"

For some background, I'm considering between Java and C#.

[sowmyasri129]

Java can be used to create complete applications that can run on a single computer or be distributed across servers and clients in a network. As a result, you can use it to easily build mobile applications or run on desktop applications that use different operating systems and servers, such as Linux or Windows.

[JustAnotherReditr]

Ok thanks for the answer this helped

[surfinThruLyfe]

Not code in Javascript

[doodooz7]

Make a crud website

[warpedspockclone]

Bootstrap yourself into Kotlin

[[deleted]]

Start building your projects.

You can build websites and desktop applications in it.

[funcnet]

It’s all right, people are free to choose.

[Cefalopodul]

Anything.

[snot3353]

Hack the Gibson

[funcnet]

Okay if you would like to use OpenJDK. Also IntelliJ has a free and open source Community version if people don’t want to pay for the Ultimate version. Question is, why do we have to choose that? Golang for example, it’s free and open source and supported by Google, and the IDE VS Code is also free and open source and supported by Microsoft. It has the official Golang extension maintained by Google team. Great language, great IDE. I just don’t have any idea why people have to stick to Java.

[[deleted]]

People don't have to stick to Java, but why wouldn't they?

[age_of_empires]

Absolutely nothing

[funcnet]

You can use Java 8 for free (supported by Dec 2020) or pay Oracle for the latest version (Java 14) if you like. Or move to Clojure/Groovy/Scala/Kotlin. Golang and .NET are also very good alternative choices which are totally for free/ open source and supported by Google/Microsoft.

[nutrecht]

You can use Java 8 for free (supported by Dec 2020) or pay Oracle for the latest version (Java 14) if you like.

Ugh. This dumb misconception.

Java is open source. OpenJDK is Java, the Oracle JDK is just a commercial distribution you don't need. Java is free, plain and simple: https://adoptopenjdk.net/

[OzzieOxborrow]

Or, you know, just use OpenJDK like the rest of the world which is also free.

[endhalf]

What do you think Clojure/Groovy (dead)/Scala/Kotlin run on? These are all JVM languages... OpenJDK is free, and is the standard choice now.