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Reusability is the main concept in any programming language. A JavaBean is a software component that has been designed to be reusable in a variety of environments. Let us dive into the topic and understand the horizons of concept in this ‘What is JavaBeans’ article.
Following pointers will be our topics of discussion:
Let’s begin!
JavaBeans is a portable, platform-independent model written in Java Programming Language. Its components are referred to as beans.
In simple terms, JavaBeans are classes which encapsulate several objects into a single object. It helps in accessing these object from multiple places. JavaBeans contains several elements like Constructors, Getter/Setter Methods and much more.
JavaBeans has several conventions that should be followed:
Now that you are familiar with basics, let’s learn in detail about the properties of JavaBeans.
A JavaBean property can be accessed by the user of the object. The feature can be of any Java data type, containing the classes that you define. It may be of the following mode: read, write, read-only, or write-only. JavaBean features are accessed through two methods:
1. getEmployeeName ()
For example, if the employee name is firstName, the method name would be getFirstName() to read that employee name. This method is known as an accessor. Properties of getter methods are as follows:
2.setEmployeeName ()
For example, if the employee name is firstName, the method name would be setFirstName() to write that employee name. This method is known as a mutator. Properties of setter methods:
Now that you have attained some theoretical knowledge about JavaBeans, let us move on and understand the implementation process.
The example program shown below demonstrates how to implement JavaBeans.
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; } }
Next program is written in order to access the JavaBean class that we created above:
public class Employee1 { public static void main(String args[]) { Employee s = new Employee(); s.setName("Chandler"); System.out.println(s.getName()); } }
Chandler
So, that’s how to implement a Java program which accesses the JavaBean class.
The following list enumerates some of the benefits of JavaBeans:
Portable
JavaBeans components are built purely in Java, hence are fully portable to any platform that supports the Java Run-Time Environment. All platform specifics, as well as support for JavaBeans, are implemented by the Java Virtual Machine.
Compact and Easy
JavaBeans components are simple to create and easy to use. This is an important focus sector of the JavaBeans architecture. It doesn’t take much effort to write a simple Bean. Also, a bean is lightweight, so, it doesn’t have to carry around a lot of inherited baggage to support the Beans environment.
Carries the Strengths of the Java Platform
JavaBeans is pretty compatible, there isn’t any new complicated mechanism for registering components with the run-time system.
Though all these sound good, using JavaBeans presents some disadvantages as well. Now, let’s check out what those would be.
With this, we have reached the end of this “What is JavaBeans” article. I hope that the contents explained discussed here added value to your Java knowledge. Well, keep exploring the Java world. Stay tuned!
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Got a question for us? Please mention it in the comments section of this “What is JavaBeans’’ blog and we will get back to you as soon as possible.
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