What is javaBean

JavaBean is a reusable component (software model) written in JAVA language. It is a special Java class that has a certain function or processes a certain function by encapsulating properties and methods. Business objects (beans).

Characteristics of javabean

Since javabean is based on java language, javabean does not depend on the platform and has the following characteristics:

1. Code reuse can be achieved

2. Easy to write, easy to maintain, easy to use

3. It can be used on any platform with a Java runtime environment installed without recompiling.

JavaBeans can be divided into two types:

1. JavaBeans with user interface (UI, User Interface);

2. Without user interface , a JavaBean that is mainly responsible for processing transactions (such as data operations and database manipulation). JSP usually accesses this kind of JavaBean.

Requirements for JavaBean

● Properties must be private (private String username)

● Private properties must provide get or set methods

● Must provide an empty constructor (manually provide a constructor with parameters, then the empty constructor must be provided manually)

● Implement the Serializable interface (optional)

Recommended related video tutorials: "JAVA Tutorial"

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