making drag and drop and connect in swing java

Hi all,
I am working on a project which is based on flow diagram like this,
Attachment 31283

I know that I can drag and drop objects by DnD API but how can I connect them ?

I wish that each object(component part) should have desired connectors placing mouse on a connector and then dragging draws a wire and clicking on another connector joins the two.

Please help me to build such type of operation/feature.

I am in a great need please help me
thanks in advance.

I think you can do this sort of thing with JGraph which is freely available.

Oh thank you yery much,
can i make/define my own custom shapes and number of connection points to each block/component.
Please tell me more ........

You're best bet is to look at the JGraph website.

hi I am unable to understand how to use jgraph please give me a demo with small code please please