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Show HN: CheerpJ JavaFiddle – Run Java in the browser

javafiddle.leaningtech.com

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Re: Show HN: CheerpJ JavaFiddle – Run Java in the browser

#14

Post by benjismith »

Awesome! I'm very excited about this...

As the primary developer of a large sophisticated Javascript app (https://shaxpir.com), working with Javascript is an ongoing nuisance, and I'd love to switch the majority of my development to a type-safe language.

I've been considering a switch to TypeScript, but with 17 years of experience as a back-end Java developer, my natural first-choice of language is Java.

But this is a modern webapp, so I'm not really interested in seeing Console/Swing/AWT demos. I'm much more interested in seeing demos that integrate Java code with native Javascript dependencies, especially around DOM manipulation and browser event handling.

I want to rewrite all my own business logic in Java, while continuing to integrate with my existing dependencies in the browser (JQuery, Bootstrap, Quill, etc).

A demo like that would be very compelling to me!

Re: Show HN: CheerpJ JavaFiddle – Run Java in the browser

#16

Post by multimillion »

benjismith wrote: post #14

Awesome! I'm very excited about this... As the primary developer of a large sophisticated Javascript app ( https://shaxpir.com ), working with Javascript is an ongoing nuisance, and I'd love to switch the majority of my development to a type-safe language. I've been considering a switch to TypeScript, but with 17 years of experience as a back-end Java developer, my natural first-choice of language is Java. But this i…

Hello Benji!

Please get in touch with us, your project is very exciting and would be a great use case for CheerpJ. Just drop us a line at http://leaningtech.com/cheerpj/#early.

CheerpJ has full DOM access and interoperability with JavaScript. Demos of these case study will be coming soon.

Cheers - LT

Re: Show HN: CheerpJ JavaFiddle – Run Java in the browser

#19

Post by jay-anderson »

Seems to work pretty well. I like this approach over things like GWT. Though creating a syntax error caused a bad exception:

  public class JavaFiddle
  {
      public static void main(String[] args)
      {
          x = 0;
      }
  }
Results in

  An exception has occurred in the compiler (1.8.0_131). 
  Please file a bug against the Java compiler via the Java bug reporting page (http://bugreport.java.com) after checking the Bug Database (http://bugs.java.com) for duplicates. Include your program and the following diagnostic in your report. Thank you.
  java.lang.NullPointerException
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