I understood, I deliberation, that a "Legume" is a Java-people with properties and getters/setters.
Arsenic overmuch arsenic I realize, it is the equal of a C struct. Is that actual?
Besides, is location a existent syntactic quality betwixt a JavaBean and a daily class?
Is location immoderate particular explanation oregon an Interface?
Fundamentally, wherefore is location a word for this?
Besides what does the Serializable interface average?
A JavaBean is conscionable a modular. It is a daily Java class, but it follows definite conventions:
- Each properties are backstage (usage getters/setters)
- A national nary-statement constructor
- Implements
Serializable.
That's it. It's conscionable a normal. Tons of libraries be connected it although.
With regard to Serializable, from the API documentation:
Serializability of a people is enabled by the people implementing thejava.io.Serializable interface. Courses that bash not instrumentality thisinterface volition not person immoderate of their government serialized oregon deserialized.Each subtypes of a serializable people are themselves serializable. Theserialization interface has nary strategies oregon fields and serves lone toidentify the semantics of being serializable.
Successful another phrases, serializable objects tin beryllium written to streams, and therefore information, entity databases, thing truly.
Besides, location is nary syntactic quality betwixt a JavaBean and different people -- a people is a JavaBean if it follows the requirements.
Location is a word for it, due to the fact that the modular permits libraries to programmatically bash issues with people situations you specify successful a predefined manner. For illustration, if a room desires to watercourse immoderate entity you walk into it, it is aware of it tin due to the fact that your entity is serializable (assuming the room requires your objects beryllium appropriate JavaBeans).
Location's a word for it to brand it dependable particular. The world is obscurity close truthful mysterious.
Fundamentally, a "Legume":
- is a serializable entity (that is, it implements
java.io.Serializable, and does truthful appropriately), that - has "properties" whose getters and setters are conscionable strategies with definite names (similar, opportunity,
getFoo()is the getter for the "Foo" place), and - has a national zero-statement constructor (truthful it tin beryllium created astatine volition and configured by mounting its properties).
Arsenic for Serializable: That is thing however a "marker interface" (an interface that doesn't state immoderate features) that tells Java that the implementing people consents to (and implies that it is susceptible of) "serialization" -- a procedure that converts an case into a watercourse of bytes. These bytes tin beryllium saved successful records-data, dispatched complete a web transportation, and so forth., and person adequate accusation to let a JVM (astatine slightest, 1 that is aware of astir the entity's kind) to reconstruct the entity future -- perchance successful a antithetic case of the exertion, oregon equal connected a entire another device!
Of class, successful command to bash that, the people has to abide by definite limitations. Main amongst them is that each case fields essential beryllium both primitive varieties (int, bool, and so forth.), situations of any people that is besides serializable, oregon marked arsenic transient truthful that Java gained't attempt to see them. (This of class means that transient fields volition not last the journey complete a watercourse. A people that has transient fields ought to beryllium ready to reinitialize them if essential.)
A people that tin not abide by these limitations ought to not instrumentality Serializable (and, IIRC, the Java compiler gained't equal fto it bash truthful.)
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What is a JavaBean exactly?
What is a JavaBean exactly? from Youtube.com