import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
 
public class JMileage {
	
    private static void createAndShowGUI() {
        JFrame.setDefaultLookAndFeelDecorated(true);
	JFrame frame = new JFrame();
	frame.setLocationRelativeTo(null);
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
 
		JMenuBar menuBar = new JMenuBar();
    		setJMenuBar(menuBar);
		
        //Add Panel 
		JPanel topPanel = new JPanel();
		   frame.getContentPane().add(topPanel);
	//Display the window
		frame.setSize(500,400);
		frame.setVisible(true);
    }
 
    public static void main(String[] args) {
	        SwingUtilities.invokeLater(new Runnable() {
        	    public void run() {
                	createAndShowGUI();
            	    }
        	});
    }
}