GUI Java program requiring action event button

I am making a simple java program representing the Microsoft Word menu bar. I add an exit button in the file menu... It does nothing

I need your help to tell me what to do to actually exit the exit button and close the program

This is my code:

public class MicrosoftWordMenu {
        public static void main(String [] args)
        {
        JPanel panel = new JPanel();
        JFrame frame = new JFrame("Microsoft Word");
        JMenuBar bar = new JMenuBar();
        JMenu menu = new JMenu("File");
        JMenu menu1 = new JMenu("Edit");
        JMenu menu2 = new JMenu("View");
        JMenu menu3 = new JMenu("Insert");
        JMenu menu4 = new JMenu("Format");
        JMenu menu5 = new JMenu("Tools");
        JMenu menu6 = new JMenu("Table");
        JMenu menu7 = new JMenu("Window");
        JMenu menu8 = new JMenu("Help");

        frame.add(bar,BorderLayout.NORTH);
        frame.add(panel);

        bar.add(menu);
        bar.add(menu1);
        bar.add(menu2);
        bar.add(menu3);
        bar.add(menu4);
        bar.add(menu5);
        bar.add(menu6);
        bar.add(menu7);
        bar.add(menu8);

        JMenuItem menuitem = new JMenuItem("New...");
        JMenuItem menuitem1 = new JMenuItem("Open...");
        JMenuItem menuitem2 = new JMenuItem("Close");
        JMenuItem menuitem3 = new JMenuItem("Save");
        JMenuItem menuitem4 = new JMenuItem("Save as...");
        JMenuItem menuitem5 = new JMenuItem("Save as web page...");
        JMenuItem menuitem6 = new JMenuItem("Web page preview ");
        JMenuItem menuitem7 = new JMenuItem("Print ");
        JMenuItem menuitem8 = new JMenuItem("Exit");

        menu.add(menuitem);
        menu.add(menuitem1);
        menu.add(menuitem2);
        menu.add(menuitem3);
        menu.add(menuitem4);
        menu.add(menuitem5);
        menu.add(menuitem6);
        menu.add(menuitem7);
        menu.add(menuitem8);

        frame.setSize(600,100);
        frame.setVisible(true);
        }

}

Solution

You can also consider using action to make components share functions, as shown here