[Advanced-java] Question regarding approach

[Murali Mani]

Folks,

I have a quick question regarding what is the best approach of doing
something..

I want to design an interface for drawing say ER diagrams.
what I need to do is:

(a) there should be a toolbar which allows me to select entity
types/relationship types, an icon for moving objects, an icon for
deleting objects.

(b) I need a workspace where I can place entity types etc, and then I can
change this object's properties such as name, where it is placed, or for a
relationship type, I can specify properties such as what entity types are
related, cardinalities etc

What do you think is the best Java tools I can use so that I can minimize
my coding.. :)

best regards,
murali.