In a new posting from PHP Magazine:

Sandro Zic's presentation on PHP 5 Enterprise Edition at OSCOM 4 is now available online. The discussion following the session suggested a growing interest on both sides (Java and PHP). Sandro writes, "The PHP devs want to learn more about Java approaches to the enterprise market, like J2EE. On the other side, Java-devs are curious about this rapid development scripting language called PHP."

They also include two of the major points that the presentation says: The PHP and Java world still reside on two different planets, there's yet only little, but growing contact between both dev communities and PHP and Java form two different paradigms of problem solving, mainly coming down to "getting things done" (PHP) and "doing things right" (Java)

While I'm not involved in the Java community, I'm not one-hundred percent sure that that last part is an accurate statement.