Add JMenu to JFrame in Java

//from w  w w . j a v  a 2s  . c  om
import javax.swing.JFrame;
import javax.swing.JMenu;
import javax.swing.JMenuBar;

public class Main extends JFrame {
  private JMenuBar menuBar = new JMenuBar(); // Window menu bar
  public Main (String title) {
    setTitle(title);
    setDefaultCloseOperation(EXIT_ON_CLOSE);
    setJMenuBar(menuBar); // Add the menu bar to the window
    JMenu fileMenu = new JMenu("File"); // Create File menu
    JMenu elementMenu = new JMenu("Elements"); // Create Elements menu
    menuBar.add(fileMenu); // Add the file menu
    menuBar.add(elementMenu); // Add the element menu
  }
  public static void main(String[] args) {
    Main window = new Main("Sketcher"); 
    window.setBounds(30, 30, 300, 300);
    window.setVisible(true);
  }
}