Persistent Objects
Most programs have a common problem: they want to save part of their state, (i.e., part of their objects), in certain moments to make sure they survive the end of the program run. This process is called persisting. In another moment, and frequently in another program run, persistent objects should eventually be taken back from their exile to operative use.
There are many options to make data and objects “durable” in Java. Typical variants include:
Saving the object attributes to a file(e.g., in XML format).
Serialization of an object graph in a stream.
Saving the objects to a relational ...
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