Java Copy Paste

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

public class PopupMenu {

    private JMenu jMenu;
    JPopupMenu popupMenu = new JPopupMenu();

    public PopupMenu() {
        init();
    }

    private void init() {
        jMenu = new JMenu("Edit");
        addAction(new DefaultEditorKit.CopyAction(), KeyEvent.VK_A, "Select All");
        addAction(new DefaultEditorKit.CopyAction(), KeyEvent.VK_C, "Copy");
        addAction(new DefaultEditorKit.CutAction(), KeyEvent.VK_X, "Cut");   
        addAction(new DefaultEditorKit.PasteAction(), KeyEvent.VK_V, "Paste");
    }

    private void addAction(TextAction action, int key, String text) {
        action.putValue(AbstractAction.ACCELERATOR_KEY,
                KeyStroke.getKeyStroke(key, InputEvent.CTRL_DOWN_MASK));
        action.putValue(AbstractAction.NAME, text);
        jMenu.add(new JMenuItem(action));
        popupMenu.add(new JMenuItem(action));
    }

    public void setPopup(JTextComponent... components) {
        if (components == null) {
            return;
        }
        for (JTextComponent tc : components) {
            tc.setComponentPopupMenu(popupMenu);
        }
    }

    public JMenu getMenu() {
        return jMenu;
    }
}

The way to use:

PopupMenu popupmenu = new PopupMenu();
popupmenu.setPopup(txtTextField);