Concept of java beans

[Jabeen]

Hi All,

I am beginner in the java programmer. I am getting difficulties in understanding the concept of the "Java beans". Java beans concept is very complicated. I have gone through different java book but id doesn't works.

I need your help to understand the "Java beans" concept. I will appreciate you help if are able to explain it with suitable example.

[Praetor]

Hi,

The classes of the java programming which follows the particular conventions of coding is referred as "Java beans".

Following are the some example of the conventions of coding:

1. Providing constructor with no argument

2. Providing setter & getter methods to take access over it's properties

3.Implementing interface "java.io.Serializable"accessing it's properties

[Katty]

Please study below program of the "Java beans" careful. Which will demonstrate you how to use java beans.
Copy the below code and execute on your computer:

package com.stardeveloper.bean.test;

public class BeanDemo implements java.io.Serializable {



private String nm = null; // Properties
private int age1 = 0;


public BeanDemo() {}


public String getName() {
return nm;
}

public void setName(String s) {
nm = s;
}

public int getAge() {
return age1;
}

public void setAge1(int a) {
age1 =a;
}
}

[kelfro]

Reusable component of the software which is manipulated visually within builder tools is known as " Java Bean".

Following are the some well-known features of the Java Beans:

1. Java Beans has support over "customization" which enable user to change the behavior as well as appearance.

2. Java Beans has support to "Introspection " which enable builder tool for analyzing working of the beans.

3. Java Beans has support to "event" which enables a user to fire different events.

[Zecho]

Below is the simple bean program, which changes the Background color to "GREEN ",foreground color to "BLUE ". and also changes the alignment.
Below java bean program code is running successfully on my machine:

import javax.swing.JLabel;
import java.awt.Color;
import java.io.Serializable;
import java.beans.XMLDecoder;


public class BeanDM extends JLabel
implements Serializable {

public BeanDM() {

setText( "Hi all!" );

setOpaque( true );

setBackground( Color.GREEN );

setForeground( Color.BLUE );

setVerticalAlignment( RIGHT );

setHorizontalAlignment( RIGHT );

}
}