Displays/Screens using Java on iSeries?

Been thinking about this, is their anyway we can use FULL JAVA to write an 
iSeries App. V5R4

Basic Database App I think needs following:
(a) Tables, Indexes < No java here:-)
(b) Stored Procedures < I can do with SQL>
(c) Reports < Creating Spool Files can be done via the 
com.ibm.as400.access.* classes >
(d) Screens ???
(e) Run iSeries Native Commands ... think again most can be done via the 
ibm.as400.* classes including authentication among other things.

Question is specifically can one create Screens also none as DISPLAYS ? So 
this way user can use the standard iSeries Client Access to view/run the 
applications.

:-) ... please somebody say yes to above ... as writing in Java Swing then 
deploying the application is a super pain ... if we use Web based 
JSP/Servlet then the stuff is too difficult to work with as its not easy (or 
atleast users who are used to Green Screens) will think so ...