Many large scale mission critical enterprise applications developed by JEE however M$ .net is perfect to build rudimentary and trivial applications.
Largest enterprise applications with millions of transaction ported from mainframe to java like Saber holdings ,which is the largest booking system in the word that connects many travel agents around the word or Walmart store handle 7 million sessions and 106 million page views per day using Java!
Even governments such as Iran Brazil UK and China mandate using java for their development platform
On one hand we have a vast number of industry gurus and open source professionals and billion dollar companies like IBM, BEA Systems, Oracle, Hewlett-Packard JBoss etc supporting Java ,on the other hand we have bunch of Drag and drop ,copy paste dumb developers and a company called M$ which fighting in many fronts range from
game to music .
Moreover ,here is the J2ee mailing list not the battle ground for M$ .net and JEE.