Jainja on Google Native Client (NaCl)

#Jainja Java Virtual Machine can now be used with Google NaCl but not yet with #PNaCl (LLVM/newlib) pic.twitter.com/nJOuBi82ZX
— Guillaume Legris (@glegr1s) 26 Avril 2014

HelenOS

#Jainja Java Virtual Machine is now working on #HelenOS pic.twitter.com/ip0gwP2j03
— Guillaume Legris (@glegr1s) 22 Avril 2014

This port was not too hard thanks to the POSIX compatibility layer of HelenOS. The lack of some math libraries was filled by fdlibm. A package for HelenOS is available here

Jainja 0.8 released

Jainja is a JVM (Java Virtual Machine) written in Java. Focus is set on portability, not on performance. Jainja supports Java 1.5 features.

This release adds support for Minix, Haiku and Dart.

So Jainja currently works on Linux, Windows, xBSD, Minix, Haiku, Java SE, Android, GWT, and Dart

More infos

 

Jainja JVM on top of the Dart VM

I'm currently working on a new "platform" target for Jainja: Dart

I got some preliminary results but only simple applications are working at this stage.

Jainja VM

Jainja VM is a new JVM written in Java.

The VM can run on top of multiple environments : Java SE, Java ME, Android, Javascript, and even natively in a near future.

You can see Jainja in action in your browser (no Java plugin required, only a HTML5 browser): demo

Sources will be released during FOSDEM 2012.

Android boot on top of OpenJDK

http://www.youtube.com/watch?v=xNPMR_udvAM

Android Activity

I succeeded to have a simple Activity working with pointer and keyboard events:

public class HelloAndroidActivity extends Activity {

    /** Called when the activity is first created. */

    public void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);               

        TextView tv = new EditText(this);

        tv.setText("This is an EditText view in an AWT Window: \n");

        setContentView(tv);

    }

   

} 

http://www.youtube.com/watch?v=89XL6uDJ-cw

I can't go further without the Binder IPC system. It's an important piece of software in Android because almost all the public application framework relies on it to find and use services (window manager, audio, input methods, ...)

There is a temporary hack to replace the IPC system (for the graphical part only):

The current start process is: