this post was submitted on 13 Nov 2024
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Anon tries programming in Java (lemmy.world)
submitted 2 days ago by LiamTheBox@lemmy.world to c/greentext@sh.itjust.works
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[–] lurklurk@lemmy.world 28 points 1 day ago (25 children)

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

[–] JackbyDev@programming.dev 7 points 1 day ago (9 children)

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:

  1. No compilation step.
  2. No class declaration.
  3. Main method is not public static
  4. 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.

[–] cashew@lemmy.world 3 points 1 day ago* (last edited 1 day ago) (1 children)

Microsoft Java is a one-liner these days.

> cat program.cs
Console.WriteLine("Hello, World!");
> dotnet run
Hello, World!
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