首页 / JAVA / [Java123] JavaBean

[Java123] JavaBean

内容导读

互联网集市收集整理的这篇技术教程文章主要介绍了[Java123] JavaBean，小编现在分享给大家，供广大互联网技能从业者学习和参考。文章包含1364字，纯文字阅读大概需要2分钟。

内容图文

 

https://stackoverflow.com/questions/3295496/what-is-a-javabean-exactly

A JavaBean is just a standard

  1. All properties private (use getters/setters)
  2. A public no-argument constructor
  3. Implements Serializable.

That's it. It's just a convention. Lots of libraries depend on it though.

With respect to Serializable, from the API documentation:

Serializability of a class is enabled by the class implementing the java.io.Serializable interface. Classes that do not implement this interface will not have any of their state serialized or deserialized. All subtypes of a serializable class are themselves serializable. The serialization interface has no methods or fields and serves only to identify the semantics of being serializable.

In other words, serializable objects can be written to streams, and hence files, object databases, anything really.

Also, there is no syntactic difference between a JavaBean and another class -- a class is a JavaBean if it follows the standards.

There is a term for it because the standard allows libraries to programmatically do things with class instances you define in a predefined way. For example, if a library wants to stream any object you pass into it, it knows it can because your object is serializable (assuming the lib requires your objects be proper JavaBeans).

 

https://stackoverflow.com/questions/1973073/what-is-a-java-bean

 

内容总结

以上是互联网集市为您收集整理的[Java123] JavaBean全部内容，希望文章能够帮你解决[Java123] JavaBean所遇到的程序开发问题。 如果觉得互联网集市技术教程内容还不错，欢迎将互联网集市网站推荐给程序员好友。

内容备注

版权声明：本文内容由互联网用户自发贡献，该文观点与技术仅代表作者本人。本站仅提供信息存储空间服务，不拥有所有权，不承担相关法律责任。如发现本站有涉嫌侵权/违法违规的内容， 请发送邮件至 gblab@vip.qq.com 举报，一经查实，本站将立刻删除。

内容手机端

扫描二维码推送至手机访问。

本文链接：https://qyyshop.com/info/832865.html

来源：【匿名】