Java Database Connectivity (JDBC)

Hi All

I need to construct a tree in java objects out of a table that has a nested set ( Joe Celko ) .
I have the table
Products
ProductID number primary key
Left number
Right number

A wanted to construct a tree base on the following
class Product {
Integer ProductID;
Product left;
Product right;
.....
}

Does anyone know of a example/tutorial that explains this


thanks