Java JScrollBar handle adjustment event

import java.awt.FlowLayout;
import java.awt.event.AdjustmentEvent;

import javax.swing.JFrame;
import javax.swing.JScrollBar;

public class Main extends JFrame {

  public Main() {
    JScrollBar sb1 = new JScrollBar();

    getContentPane().setLayout(new FlowLayout());
    getContentPane().add(sb1);//from  w  ww  .  j  a  v a 2 s.com

    sb1.addAdjustmentListener((AdjustmentEvent e) -> {
      if (!e.getValueIsAdjusting()) {
        // The logic for value changed goes here
        System.out.println(e.getValue());
      }
    });

  }

  public static void main(String[] args) {
    Main gui = new Main();
    gui.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    gui.setSize(400, 250);
    gui.setVisible(true);
  }
}