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Question: What exactly is a JavaBean?

In my opinion, a “Bean” is a Java class with properties and getters/Setters. As far as I know, it’s equivalent to the C structure. Is it true?

Also, is there a real syntax difference between beans and regular classes? Are there any special definitions or interfaces?

Basically, why is there a term?

What is Serializable interface?

Answer:


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JavaBean is just a standard

All attributes are private (using getters/setters). A public no-argument constructor implements Serializable.Copy the code

That’s it. It’s just a convention. Although many libraries rely on it.

About Serializable, from the API documentation:

Serializable classes can be enabled by classes that implement the Java.io.Serializable interface. Classes that do not implement this interface will not serialize or deserialize their state. All subtypes of a serializable class are themselves serializable. The serialization interface has no methods or fields and is used only to identify serializable semantics.

In other words, serializable objects can be written to streams, and therefore to files, object databases, or anything else.

Moreover, there is no syntactic difference between a JavaBean and another class – if a class complies with standards, that class is a JavaBean.

It has a term because the standard allows libraries to programmatically operate on class instances that you define in a predefined way. For example, if a library wants to stream any objects you pass to it, it knows it can because your objects are serializable (assuming the library requires your objects to be correct JavaBeans).

The article translated from am2dgbqfb6mk75jcyanzabc67y ac4c6men2g7xr2a – stackoverflow – com. Translate. Goog/questions / 3…

Nothing special, the authors suggest. Serializable, has properties, has constructors

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