Developing Google Maps Application by Java (not Java Script)

I have developed Google Maps GUI Component for Java.
We can use AJAX & java in the right positions like this.

http://mapswidgets.sourceforge.jp/

It is created on eclipse 3.1 SWT Browser component which run java
script by java code.

It enables us to develop

http://www.google.com/apis/maps/documentation/#Creating_Icons

by this java code

http://cvs.sourceforge.jp/cgi-bin/viewcvs.cgi/mapswidgets/mapswidgets/src/jp/sf/mapswidgets/sample/CreatingIcons.java?view=markup