JScroll Bar Problem

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

public class AddScrollBarToJFrame {
  public static void main(String args[]) {
    JScrollBar bar1 = new JScrollBar(JScrollBar.HORIZONTAL);
    JScrollBar bar2 = new JScrollBar(JScrollBar.VERTICAL);
    JFrame frame = new JFrame();
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    Container contentPane = frame.getContentPane();
    contentPane.add(bar1, BorderLayout.SOUTH);
    contentPane.add(bar2, BorderLayout.EAST);
    frame.setSize(300, 150);
    frame.setVisible(true);
  }
}