Java - zjisteni hodnoty JScrollBar

import java.awt.BorderLayout;
import java.awt.EventQueue;
import java.awt.event.AdjustmentEvent;
import java.awt.event.AdjustmentListener;

import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JScrollBar;
import javax.swing.border.EmptyBorder;

@SuppressWarnings("serial")
public class Posuvnik extends JFrame {

    private JPanel contentPane;
    private JLabel text;
    private JScrollBar posuvnik;

    public static void main(String[] args) {
        EventQueue.invokeLater(new Runnable() {
            public void run() {
                try {
                    Posuvnik frame = new Posuvnik();
                    frame.setVisible(true);
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
        });
    }

    public Posuvnik() {
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setBounds(100, 100, 450, 300);
        contentPane = new JPanel();
        contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
        contentPane.setLayout(new BorderLayout(0, 0));
        setContentPane(contentPane);

        posuvnik = new JScrollBar();
/* ------------------------------------------------------------------------------------- */
        posuvnik.addAdjustmentListener(new AdjustmentListener() {
            public void adjustmentValueChanged(AdjustmentEvent arg0) {
                text.setText( String.valueOf( posuvnik.getValue() ) );
            }
        });
/* ------------------------------------------------------------------------------------- */
        posuvnik.setOrientation(JScrollBar.HORIZONTAL);
        contentPane.add(posuvnik, BorderLayout.NORTH);

        text = new JLabel("New label");
        contentPane.add(text, BorderLayout.SOUTH);
    }

}