Copy and pasting

import java.awt.*;
import java.awt.event.*;
import java.awt.datatransfer.*;
import java.io.*;
import java.util.*;
import javax.swing.*;
import javax.swing.text.*;
import javax.swing.table.*;

public class TCPopupEventQueue extends EventQueue {
public JPopupMenu popup;
JTable table;
public BasicAction cut, copy, paste, selectAll;

public TCPopupEventQueue() {
//createPopupMenu();
}

public void createPopupMenu(JTextComponent text){
cut = new CutAction("Cut",null);
copy = new CopyAction("Copy", null);
paste = new PasteAction("Paste",null);
selectAll = new SelectAllAction("Select All",null);
cut.setTextComponent(text);
copy.setTextComponent(text);
paste.setTextComponent(text);
selectAll.setTextComponent(text);

popup = new JPopupMenu();
popup.add( cut );
popup.add( copy );
popup.add( paste );
popup.addSeparator();
popup.add( selectAll );
}

public void showPopup(Component parent, MouseEvent me){
popup.validate();
popup.show(parent, me.getX(), me.getY());
}

protected void dispatchEvent(AWTEvent event){
super.dispatchEvent(event);
if(!(event instanceof MouseEvent)){
return;
}
MouseEvent me = (MouseEvent)event;
if(!me.isPopupTrigger()) {
return;
}
if( !(me.getSource() instanceof Component) ) {
return;
}
Component comp = SwingUtilities.getDeepestComponentAt((Component)me.getSource(),me.getX(), me.getY());
if( !(comp instanceof JTextComponent)){
return;
}
if(MenuSelectionManager.defaultManager().getSelectedPath().length > 0){
return;
}
createPopupMenu((JTextComponent)comp);
showPopup((Component)me.getSource(), me);
}
public abstract class BasicAction extends AbstractAction{
JTextComponent comp;

public BasicAction(String text, Icon icon) {
super(text, icon);
putValue(Action.SHORT_DESCRIPTION, text);
}
public void setTextComponent(JTextComponent comp){
this.comp = comp;
}
public abstract void actionPerformed(ActionEvent e);
}
public class CutAction extends BasicAction {
public CutAction(String text, Icon icon) {
super(text, icon);
putValue(Action.ACCELERATOR_KEY, KeyStroke.getKeyStroke("ctrl X"));
}
public void actionPerformed(ActionEvent e){
comp.cut();
}
public boolean isEnabled(){
return comp != null && comp.isEditable() && comp.getSelectedText() != null;
}
}
public class CopyAction extends BasicAction{
public CopyAction(String text, Icon icon){
super(text,icon);
putValue(Action.ACCELERATOR_KEY, KeyStroke.getKeyStroke("ctrl C"));
}
public void actionPerformed(ActionEvent e) {
comp.copy();
}
public boolean isEnabled() {
return comp != null && comp.getSelectedText() != null;
}
}
public class PasteAction extends BasicAction{
public PasteAction(String text, Icon icon){
super(text,icon);
putValue(Action.ACCELERATOR_KEY, KeyStroke.getKeyStroke("ctrl V"));
}
public void actionPerformed(ActionEvent e) {
comp.paste();
}
public boolean isEnabled() {
Transferable content = Toolkit.getDefaultToolkit().getSystemClipboard().getContents(null);
return comp != null && comp.isEnabled() && comp.isEditable()
&& content.isDataFlavorSupported(DataFlavor.stringFlavor);
}
}

public class SelectAllAction extends BasicAction{
public SelectAllAction(String text, Icon icon){
super(text,icon);
putValue(Action.ACCELERATOR_KEY, KeyStroke.getKeyStroke("ctrl A"));
}
public void actionPerformed(ActionEvent e){
comp.selectAll();
}
public boolean isEnabled() {
return comp != null && comp.isEnabled() && comp.getText().length() > 0
&& (comp.getSelectedText() == null ||
comp.getSelectedText().length() < comp.getText().length());
}
}
public static void main(String[] args) {
Toolkit.getDefaultToolkit().getSystemEventQueue().push( new TCPopupEventQueue());
JTextField field = new JTextField(20);
JTextField field1 = new JTextField(20);
JPanel center = new JPanel( new FlowLayout(FlowLayout.LEFT) );


center.add(new JLabel("cell1:"));
center.add(field);
center.add(new JLabel("cell2:"));
center.add(field1);
JPanel content = new JPanel( new FlowLayout(FlowLayout.LEFT) );
content.add( center, BorderLayout.SOUTH );
JFrame frame = new JFrame("cell copy past program");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setContentPane(content);
frame.setSize(550,100);
frame.setVisible(true);
}
}