What is bean in java

Bean in Java is a reusable component that encapsulates data and operation methods to facilitate communication between objects. Its characteristics include: serializable, persistent, has properties and accessor methods, and follows JavaBeans conventions. Beans are commonly used for inter-object communication, persistence, remote calling and configuration. To create a bean, you inherit the Serializable interface, define properties, and create accessor methods, while following naming conventions.

Bean in Java

Bean in Java is a reusable software component that encapsulates data and methods for manipulating data so that communication between objects can be facilitated.

Characteristics

Bean has the following characteristics:

• Serializable: Bean can be converted to bytes Stream for transmission over a network or file system.
• Persistible: Beans can be stored in a database or other persistent storage.
• Have properties: Beans contain state information called properties.
• Have accessor methods: Accessor methods are used to get and set the property value of the Bean.
• Follow JavaBeans conventions: Beans must follow specific naming conventions, including property naming rules and accessor method naming rules.

Purpose

Bean is usually used in the following scenarios:

• For communication between objects, such as in GUI components and business Pass data between logic.
• is used for persistence, storing objects in a database or file for later use.
• Used for remote calls to communicate with objects in other programs through the network.
• is used for configuration and storage of application settings.

Create Bean

To create a Bean, you can follow these steps:

1. Create a class and make it inherit fromjava.io.SerializableInterface.
2. Define Bean properties (fields).
3. Create a pair of accessor methods for each property, one to get the value and one to set the value.
4. Make sure to follow the JavaBeans naming convention.

Example

The following is a simple Bean example:

<code class="java">public class PersonBean implements Serializable {

    private String name;
    private int age;

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public int getAge() {
        return age;
    }

    public void setAge(int age) {
        this.age = age;
    }
}</code>

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