Specify the item that is to be returned in the query result. Replaces the previously specified selection(s), if any.

Note: Applications using the string-based API may need to specify the type of the select item when it results from a get or join operation and the query result type is specified.

     For example:

     CriteriaQuery
    
      q = cb.createQuery(String.class);
     Root
     
       order = q.from(Order.class); q.select(order.get("shippingAddress").
      
       get("state")); CriteriaQuery
       
         q2 = cb.createQuery(Product.class); q2.select(q2.from(Order.class) .join("items") .
        
         join("product"));