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What are JavaBeans?

by Bhumika

JavaBeans is a portable, platform-agnostic model written in the Java programming language. The components that make it up are beans.

To put it another way, JavaBeans are classes that encapsulate several objects into a single object. It allows users to access these items from a number of locations. JavaBeans include constructors, getter/setter methods, and other functionality.

There are a couple of JavaBeans conventions to follow:

  • A default constructor should be available for beans (no arguments).
  • Beans should include getter and setter methods.
  • A getter method is use to read the value of a readable property.
  • To update the value, a setter method should be use.

Because it allows you to save, store, and restore the state of the JavaBean you’re working with, JavaBeans should implement java.io.serializable.

A JavaBean is a Java class that must meet the rules below:

  • It needs a function Object() { [native code] } that doesn’t take any arguments.
  • This must be serializable.
  • It should have getter and setter methods for changing and retrieving property values.

Advantages of JavaBeans 

The following are some of the advantages of Java Beans:-

  • Portable: JavaBeans are portable because they are totally written in Java and can execute on any platform that supports the Java Run-Time Environment. All platform-specific functionality, as well as JavaBeans support, are implemented by the Java Virtual Machine.
  • Compact and Easy: Components created with JavaBeans are small and simple to design and utilize. Furthermore, This is emphasized heavily in the JavaBeans architecture. It is not difficult to write a basic Bean. A bean also does not need to carry a lot of inherited baggage to sustain its habitat because it is light.
  • Contains the Java Platform’s Strengths: In JavaBeans, there is no new complex process for registering components with the run-time system, hence it is quite compatible.
  • The JavaBean attributes and methods can be access through another programme.
  • It makes it a lot easier to reuse software components.


A JavaBean property is a named feature of an object that may be access through the object’s user. Any Java data type can be used as a feature, but it must include the classes you specify.

A JavaBean property can be read-only, read-write, or write-only. JavaBean features are access via two methods in the implementation class of the JavaBean:

  • getPropertyName ()

For example, if the property is called firstName, the method to read it is called getFirstName(). The accessor is the name for this procedure.

  • setPropertyName ()

For example, if the property name is firstName, the method to write that value is setFirstName(). The mutator is the name of this approach.

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