Recuperer le mot selectionné -Java-

package hacktrack;

import java.awt.BorderLayout;
import java.awt.Container;
import java.awt.Dimension;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;

import javax.swing.JFrame;
import javax.swing.JTextArea;
import javax.swing.JTextField;

public class TextSelectDemo extends JFrame implements MouseListener {

	private JTextArea textarea;
	private JTextField textfield;

	public TextSelectDemo() {
		super("HackTrack - Text selection demo - 17/05/2012");
		initialize();
	}

	private void initialize() {
		setDefaultCloseOperation(EXIT_ON_CLOSE);
		Container c = getContentPane();
		c.setLayout(new BorderLayout());

		textarea = new JTextArea(10, 8);
		textarea.setLineWrap(true);
		textarea.addMouseListener(this);
		textarea.setText("Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum");
		c.add(textarea, BorderLayout.CENTER);

		textfield = new JTextField();
		c.add(textfield, BorderLayout.SOUTH);
		
		setPreferredSize(new Dimension(640,480));
	}

	@Override
	public void mouseClicked(MouseEvent e) {
		// TODO Auto-generated method stub

	}

	@Override
	public void mousePressed(MouseEvent e) {

	}

	@Override
	public void mouseReleased(MouseEvent e) {
		JTextArea jta = (JTextArea) e.getSource();
		String selectedTxt = jta.getSelectedText();
		textfield.setText(selectedTxt);
	}

	@Override
	public void mouseEntered(MouseEvent e) {
		// TODO Auto-generated method stub

	}

	@Override
	public void mouseExited(MouseEvent e) {
		// TODO Auto-generated method stub

	}

	public static void main(String[] args) {
		TextSelectDemo demo = new TextSelectDemo();
		demo.pack();
		demo.setVisible(true);
	}
}