How to write an Action Listener in Java?

[Beter 2 Burn Out]

Hi friends,
I have started doing Java before a month ago. I have done some basic coding into that. Now I want to implement an event handlers. I think to start with the action listener because it is very easy (read in my java book). So though that posting here would help me. Please explain me how to write an Action Listener in Java.?? It would be better for me to understand, if you provide some coding along with that.!!

[Praetor]

Even I think that the action listeners are the easiest event handlers to implement. Also you have to use this handler for many cases, so it is also used a lot. I think that before starting with the code you should know more about the action listeners. When you want to define what should be done when an user performs certain operation, then you will have to implement an action listener. Like when the user clicks a button, the result is that an actionPerformed message is sent to all action listeners. But before that you would have register on the relevant component.

[opaper]

You can follow the steps that I have mentioned below for writing an action listener :

1. The important and initial step is to declare an event handler class and along with that you must specify that whether the class either implements an ActionListener interface or extends a class that implements an ActionListener interface.
2. Then once declare, you must register an instance of the event handler class as a listener on one or more components.
3. The last step is to include the code that you have written which must implements the methods in listener interface.

[Viensterrr]

I think that you will find bit difficult to understand the steps mentioned by the 'opaper' because you might not have an idea of all that things mentioned over there. So I thought to help you by providing some useful samples of examples for that steps :
You can declare an event handler class like in the following way :

 public class MyClass implements ActionListener {

Then you can register an instance of the event handler class in this way :

someComponent.addActionListener(instanceOfMyClass);

Lastly include the code in the following method :

public void actionPerformed(ActionEvent e) { 
              ...//code that reacts to the action... 
          }

[Warner]

I am providing you with an example of the writing an Action Listener in Java Here is the coding for the same :

import java.awt.*;
import java.awt.event.*;

public class actlis extends Frame implements WindowListener,ActionListener {
	TextField text = new TextField(25);
	Button b;
	private int numClicks = 0;

	public static void main(String[] args) {
		actlis myWindow = new actlis("This is demo");
		myWindow.setSize(410,110);
		myWindow.setVisible(true);
	}

	public actlis(String title) {

		super(title);
		setLayout(new FlowLayout());
		addWindowListener(this);
		b = new Button("Click on Me");
		add(b);
		add(text);
		b.addActionListener(this);
	}

	public void actionPerformed(ActionEvent e) {
		numClicks++;
		text.setText("Button Clicked " + numClicks + " times");
	}

	public void windowClosing(WindowEvent e) {
		dispose();
		System.exit(0);
	}

	public void windowOpened(WindowEvent e) {}
	public void windowActivated(WindowEvent e) {}
	public void windowIconified(WindowEvent e) {}
	public void windowDeiconified(WindowEvent e) {}
	public void windowDeactivated(WindowEvent e) {}
	public void windowClosed(WindowEvent e) {}

}

[kyosang]

The following is the action event handling code from an applet named Handler :

public class Handler ...  implements ActionListener {

    ...

    //where initialization occurs:

        button.addActionListener(this);

    ...

    public void actionPerformed(ActionEvent e) {

        Toolkit.getDefaultToolkit().beep();

    }

}