small refactorings

git-svn-id: http://highj.googlecode.com/svn@189 bdcd8b68-9dcc-aa74-f1b9-b4da3e61a8cc
added fromJavaMap/Set methods

git-svn-id: http://highj.googlecode.com/svn@190 bdcd8b68-9dcc-aa74-f1b9-b4da3e61a8cc