it's not unusual to aggregate content published on live sites. As such, it's a good idea to develop a level of familiarity with one of the popular Java screen scraper libraries. In this step-by-step ...

Get started modeling entities and relationships for Java data persistence ... and how objects relate. Two examples are encapsulation and inheritance: Association, aggregation, composition ...

An essential property of an aggregation relationship is that the whole or parent (i.e. the owner) can exist without the part or child and vice versa. As an example, an employee may belong to one ...