Like it or not, data is an integral part of any application, even cool object-oriented ones. Everything stops at the persistence layer, where Java developers traditionally have had to write complex ...
The Jakarta Persistence API (JPA) is a Java specification that bridges the gap between relational databases and object-oriented programming. This two-part tutorial introduces JPA and explains how Java ...
The Perst open-source project is available as a free download, though a licence must be purchased for commercial or closed-source products. The object-oriented database comes in Java and C# versions.
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