Java Virtual Machine in pure Node.js • Hacker News Board

Re: Java Virtual Machine in pure Node.js

#21

Post by MrBuddyCasino » Wed, Oct 30, 2013, 4:38 PM UTC

bronxbomber92 wrote: post #13

ilaksh wrote: post #5

Would be interested in seeing a JVM written in Go.

Why? I must be missing the connection between Node and Go.

For 15 minutes of fame on HN, of course.

Re: Java Virtual Machine in pure Node.js

#22

Post by jmpe » Wed, Oct 30, 2013, 4:46 PM UTC

With GWT you can translate the Java application to standalone JavaScript files ... and with this implementation you can run Java in a Javascript environment.

Which one would perform best?

Re: Java Virtual Machine in pure Node.js

#23

Post by derleth » Wed, Oct 30, 2013, 4:52 PM UTC

dlsym wrote: post #12

18ms for calculating Fibonacci numbers from 1 to 10. This is definitily bringing JAVA back to the good old days of enterprise execution speeds. :-) Really cool proof of concept! I would really enjoy seeing more projects like this!

> JAVA

Why did you spell it in all-caps here?

Re: Java Virtual Machine in pure Node.js

#24

Post by bsg75 » Wed, Oct 30, 2013, 4:55 PM UTC

stevekinney wrote: post #2

Atwood's Law: any application that can be written in JavaScript, will eventually be written in JavaScript.

JS.js

Re: Java Virtual Machine in pure Node.js

#25

Post by big_lou » Wed, Oct 30, 2013, 4:55 PM UTC

This is the worst thing that ever happened

Re: Java Virtual Machine in pure Node.js

#26

Post by szatkus » Wed, Oct 30, 2013, 4:56 PM UTC

I created something similar some time ago.

https://github.com/szatkus/js2me

Although I targeted only J2ME subset. Also I found few similar projects:

https://github.com/nurv/BicaVM

http://plasma-umass.github.io/doppio/about.html

Re: Java Virtual Machine in pure Node.js

#27

Post by CmonDev » Wed, Oct 30, 2013, 4:58 PM UTC

So now I can use one of those Java libraries that implement a JavaScript engine and finally have JavaScript running on node.js?

Re: Java Virtual Machine in pure Node.js

#28

Post by duiker101 » Wed, Oct 30, 2013, 4:59 PM UTC

Now you just need to run Rhino(https://developer.mozilla.org/en/docs/Rhino) on it and you will be totally meta.

Re: Java Virtual Machine in pure Node.js

#29

Post by drtse4 » Wed, Oct 30, 2013, 5:02 PM UTC

mooreds wrote: post #8

drtse4 wrote: post #4

Just a toy implementation[1], if someone is wondering. [1]The basic .class file attribute parsers are located in libs/classfile, while a simple bytecode interpreter can be found in jvm.js. It doesn't load a real runtime library (classpath, apache harmony,openjdk,etc...) but it partially implements a few java.* classes in pure javascript under libs/java.

What version of java does it handle? Does it support java.lang.*? What other standard libraries?

It's too early to talk about java versions, but i suppose he used the latest jvm specification to implement his classfile parser. Only a few methods of some classes of java.lang and java.io (screen output and some basic stuff like String methods,etc..).

Re: Java Virtual Machine in pure Node.js

#30

Post by jvilk » Wed, Oct 30, 2013, 5:04 PM UTC

duiker101 wrote: post #28

Now you just need to run Rhino( https://developer.mozilla.org/en/docs/Rhino ) on it and you will be totally meta.

My current research project, Doppio, can already run Rhino in the browser using JavaScript. :)

Demo: http://doppiojvm.org/

Code:https://github.com/int3/doppio