JavaScript jvm implementation

Question

Is there any JavaScript jvm implementations?
If no, can you give me some reasons why it hasn\'t realized already? (not possible probably?) I\'m trying to understa

Answer 1

You may have a look at the bck2brwsr (aka java.net HTML)

• it is a VM that transforms java byte code into JavaScript (Bck2Brwsr Virtual Machine)
• provides a Java based wrapper to HTML (HTML via Java APIs)

The scope of the project is not to execute any existing java library. (see http://wiki.apidesign.org/wiki/Bck2Brwsr)

There are two nice examples on the web:

• a calculator, that gives good technical insight (http://xelfi.cz/bck2brwsr/)
• a nice space invader demo as a proof of concept (JAYDAY 2013 java summit page)

To get started with a working example (needs Maven and JDK7):

Step 1: load archetype

mvn archetype:generate -DarchetypeGroupId=org.apidesign.bck2brwsr \
 -DarchetypeArtifactId=bck2brwsr-archetype-html-sample -DarchetypeVersion=0.7.2 \
 -DarchetypeRepository=https://maven.java.net/content/repositories/releases/

Step 2: build HTML page and dependencies and pack as ZIP file

mvn install
# produces bck-1.0-SNAPSHOT-bck2brwsr.zip

Step 3: unpack ZIP

cd target; unzip bck-1.0-SNAPSHOT-bck2brwsr.zip
  creating: public_html/
  creating: public_html/lib/
  extracting: public_html/lib/emul-0.7.2-rt.jar  
  extracting: public_html/lib/javaquery.api-0.7.2.jar  
  inflating: public_html/bck2brwsr.js  
  extracting: public_html/bck-1.0-SNAPSHOT.jar  
  inflating: public_html/index.html 

Step 4: open index.html with your browser