why use static method in creating gui

[amit sharma]

I am to new to swing.When i search tutorial for swing i see that most of them create gui in static method .What is the purpose of it .When i make gui in static method i am not able to add listener for it.Can anyone please tell me what is the preferred way of developing desktop application using swing.
Thanks

[Gregg Bolinger]

I assume you are talking about something like this:

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
 
/* FrameDemo.java requires no other files. */
public class FrameDemo {
    /**
     * Create the GUI and show it.  For thread safety,
     * this method should be invoked from the
     * event-dispatching thread.
     */
    private static void createAndShowGUI() {
        //Create and set up the window.
        JFrame frame = new JFrame("FrameDemo");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
 
        JLabel emptyLabel = new JLabel("");
        emptyLabel.setPreferredSize(new Dimension(175, 100));
        frame.getContentPane().add(emptyLabel, BorderLayout.CENTER);
 
        //Display the window.
        frame.pack();
        frame.setVisible(true);
    }
 
    public static void main(String[] args) {
        //Schedule a job for the event-dispatching thread:
        //creating and showing this application's GUI.
        javax.swing.SwingUtilities.invokeLater(new Runnable() {
            public void run() {
                createAndShowGUI();
            }
        });
    }
}

The reason that createAndShowGUI() is static is because it's being called from a static method, main(String[] args). You can not call non-static methods from a static method, so createAndShowGUI() has to be static.