import javax.swing.*;
import java.awt.*;
import java.awt.event.*;

public class LabelCopy extends JPanel implements ActionListener
{
   JLabel sourceLabel = new JLabel ("Origen");
   JLabel targetLabel = new JLabel ("Destino");
   JButton button = new JButton("Copiar");

   LabelCopy ()
   {
      setLayout(new GridLayout(3, 0));
      add(sourceLabel);
      add(targetLabel);
      button.addActionListener (this);
      add(button);
   }

   public static void main(String[] args) 
   {
      JFrame frame = new JFrame ("Ejercicio 2");
      LabelCopy pane = new LabelCopy();
      frame.getContentPane().add(pane, BorderLayout.CENTER);
      frame.addWindowListener (new WindowAdapter() {
        public void windowClosing (WindowEvent e)
        {
           System.exit(0);
        }
      } );
      
      frame.pack();
      frame.setVisible(true);
   }

   public void actionPerformed (ActionEvent e)
   {
      targetLabel.setText (sourceLabel.getText());
   }
}