Currently there is a poll on http://www.java.net

"What one feature would you most like to see in JDK 7"

Closures are one possible choice. Closures would be soooo niiiiiiiice. Here is why:

List cats = database.query( { Cat cat => cat.getName().equals("Wolke") } );

Can Native Queries be more beautiful?

 

This is a cry to the db4o community:

Please vote for closures!

 

Some further links on closures:

http://www.javac.info/closures-v04.html

http://www.bejug.org/confluenceBeJUG/display/PARLEYS/Closures+for+Java

http://gafter.blogspot.com/2006/12/closures-talk-and-spec-update.html