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JUniversal vs DoneJS: What are the differences?

Developers describe JUniversal as "A new, Java-based approach to cross-platform mobile apps (used by Google Inbox and Google Spreadsheets)". The vision of JUniversal came from some guys at Nokia who possess considerable expertise both in Java and in building cross-platform apps. They built this tool to provide an elegant way to translate source code and make it useful across multiple platforms. JUniversal offers you the freedom to write your shared code in Java and then translate it to C# (available now) or to C++/Objective C++ (coming soon). You can also combine JUniversal with Google’s j2objc translator to translate Java to Objective-C for iOS. On the other hand, DoneJS is detailed as "An open source JavaScript framework for building real-time applications". It is an open source JavaScript framework that makes it easy to build high performance, real time web and mobile applications. It is used to make beautiful, real-time user interfaces that can be exported to run on every platform.

JUniversal and DoneJS can be categorized as "Cross-Platform Mobile Development" tools.

Some of the features offered by JUniversal are:

  • OAuth (based on Scribe)
  • JSON
  • Unit testing (JUnit)

On the other hand, DoneJS provides the following key features:

  • Supports All Browsers
  • Server Side Rendered (Isomorphic)
  • Progressive Loading

JUniversal is an open source tool with 132 GitHub stars and 22 GitHub forks. Here's a link to JUniversal's open source repository on GitHub.

- No public GitHub repository available -

What is DoneJS?

It is an open source JavaScript framework that makes it easy to build high performance, real time web and mobile applications. It is used to make beautiful, real-time user interfaces that can be exported to run on every platform.

What is JUniversal?

The vision of JUniversal came from some guys at Nokia who possess considerable expertise both in Java and in building cross-platform apps. They built this tool to provide an elegant way to translate source code and make it useful across multiple platforms. JUniversal offers you the freedom to write your shared code in Java and then translate it to C# (available now) or to C++/Objective C++ (coming soon). You can also combine JUniversal with Google’s j2objc translator to translate Java to Objective-C for iOS.
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          What are some alternatives to DoneJS and JUniversal?
          React
          Lots of people use React as the V in MVC. Since React makes no assumptions about the rest of your technology stack, it's easy to try it out on a small feature in an existing project.
          Meteor
          A Meteor application is a mix of JavaScript that runs inside a client web browser, JavaScript that runs on the Meteor server inside a Node.js container, and all the supporting HTML fragments, CSS rules, and static assets.
          CanJS
          CanJS is an evolving and improving set of client-side JavaScript architectural libraries that balances innovation and stability. It targets experienced developers building complex applications with long futures ahead of them.
          AngularJS
          AngularJS lets you write client-side web applications as if you had a smarter browser. It lets you use good old HTML (or HAML, Jade and friends!) as your template language and lets you extend HTML’s syntax to express your application’s components clearly and succinctly. It automatically synchronizes data from your UI (view) with your JavaScript objects (model) through 2-way data binding.
          Vue.js
          It is a library for building interactive web interfaces. It provides data-reactive components with a simple and flexible API.
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          Avatar of Google
          Google uses JUniversalJUniversal

          Comment from HackerNews (https://news.ycombinator.com/item?id=8998736)

          This is how Google Inbox and Google Spreadsheets works. See the slides from my recently produced GWT Create Session (http://t.co/ZvoaHxCoZT). J2ObjC slide deck here (https://docs.google.com/presentation/d/1mW_Plm5jAygELf7qjVK7...) Videos of the conference will be online soon.

          Prior to that, some 20% Googlers also produced the PlayN library (https://github.com/threerings/playn) This was taken over by Michael Bayne who added an iOS backend by Bytecode -> IKVM -> Mono conversion. I beleive j2objc and RoboVM backends exist now as well.

          The major benefit of the j2objc approach is the avoidance of GC in favor of ARC, the conversion of message-sends into C-method calls when possible, and integration with existing iOS toolchain.

          When we started, it seemed like an iffy idea, but after developing a product delivered to millions of users on a high volume site (gmail) that has 70% code sharing, and being able to simultaneously develop, test, and deploy across the platforms reasonably efficiently, a lot of skeptics have become converts to the concept.

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