Java AdjustmentListener .adjustmentValueChanged (AdjustmentEvent e)

void adjustmentValueChanged(AdjustmentEvent e)

import java.awt.event.AdjustmentEvent;
import java.awt.event.AdjustmentListener;
// ww  w .  j  a  v  a 2 s. c o  m
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollBar;
import javax.swing.SwingConstants;

public class Main extends JPanel  implements AdjustmentListener {
  JScrollBar bar = new JScrollBar(SwingConstants.HORIZONTAL, 50, 10, 0, 100);
  
  public Main() {
    super();
    bar.addAdjustmentListener(this);

    add(bar);
    
  }
  public void adjustmentValueChanged(AdjustmentEvent evt) {

    int newValue = bar.getValue();
    System.out.println(newValue);
    repaint();
  }
  public static void main(String[] args) {
    JFrame frame = new JFrame();
    frame.add(new Main());
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    frame.setBounds(20,20, 500,500);
    frame.setVisible(true);
  }
}