Java Bean

A Java Bean is a java class that should follow following conventions:

It should have a no-arg constructor.
It should be Serializable.
It should provide methods to set and get the values of the properties, known as getter and setter methods.

Why use Java Bean?

According to Java white paper, it is a reusable software component. A bean encapsulates many objects into one object, so we can access this object from multiple places. Moreover, it provides the easy maintenance.

Simple example of java bean class

//Employee.java

package mypack;
public class Employee implements java.io.Serializable{
private int id;
private String name;

public Employee(){}

public void setId(int id){this.id=id;}

public int getId(){return id;}

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

public String getName(){return name;}

}

How to access the java bean class?

To access the java bean class, we should use getter and setter methods.

package mypack;
public class Test{
public static void main(String args[]){

Employee e=new Employee();//object is created

e.setName("Arjun");//setting value to the object

System.out.println(e.getName());

}}

Note: There are two ways to provide values to the object, one way is by constructor and second is by setter method.

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JSP Tutorial

Java Bean

Why use Java Bean?

Simple example of java bean class

How to access the java bean class?

Note: There are two ways to provide values to the object, one way is by constructor and second is by setter method.