Simple Util-class which adds the edit jmenuitem to your jmenubar

JEditMenuBar.java

import javax.swing.*;
import javax.swing.text.DefaultEditorKit;
import java.awt.event.KeyEvent;

/**
 * @author 6dc
 *
 * This simple util class is used to have copy, paste, cut menubar + shortcuts (based on windows defaults)
 */

public class JEditMenuBar extends JMenuBar{

    public JEditMenuBar(){
        addEditMenu(this);
    }

    /**
     * @param menuBar your current MenuBar which has to be added with the Edit dialog
     * @return MenuBar with the added Edit-MenuItem
     */
    public static JMenuBar addEditMenu(JMenuBar menuBar){
        JMenu editMenu = new JMenu("Edit");
        editMenu.add(MenuItem.COPY.getMenuItem());
        editMenu.add(MenuItem.PASTE.getMenuItem());
        editMenu.add(MenuItem.CUT.getMenuItem());
        menuBar.add(editMenu);
        return menuBar;
    }

    enum MenuItem{
         CUT(KeyEvent.VK_X),COPY(KeyEvent.VK_C),PASTE(KeyEvent.VK_V);/*Add more if you want (undo,redo etc)*/

        int keys;

        MenuItem(int vk) {
            this.keys=vk;
        }

        JMenuItem getMenuItem(){
            JMenuItem menuItem = new JMenuItem();
            switch (keys){
                case KeyEvent.VK_X:
                    menuItem = new JMenuItem(new DefaultEditorKit.CutAction());
                    break;
                case KeyEvent.VK_V:
                    menuItem = new JMenuItem(new DefaultEditorKit.PasteAction());
                    break;
                case KeyEvent.VK_C:
                    menuItem = new JMenuItem(new DefaultEditorKit.CopyAction());
                    break;
            }
            return menuItem;
        }
    }
}