How to prevent displaying outer rectangle of JscrollPane

Question

HI All,
I want prevent the displaying JSrollPane outer rectanlge means no outer rectangle formed JSrollPane should be displayed
below is the code, if the code is run then Rectagle will appear which is title fitted to JScrollPane.
import java.awt.Color;
import java.awt.Dimension;
import java.awt.Rectangle;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
public class Sample extends JFrame
     private static final long serialVersionUID = 1L;
     public Sample()
          Dimension size = new Dimension(
               150, 150);
          Dimension FRAME_SIZE = new Dimension(
               700, 500);
          setLocation(size.width, size.height);
          setSize(FRAME_SIZE);
          setBackground(Color.WHITE);
          setTitle("JFrame ");
          setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
          JPanel panel = new JPanel();
          JScrollPane sp = new JScrollPane(
               panel, JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED,
               JScrollPane.HORIZONTAL_SCROLLBAR_NEVER);
          sp.setBounds(new Rectangle(
               10, 10, 400, 400));
          this.setLayout(null);
          super.getContentPane().add(sp);
     public static void main(String[] args)
          JFrame frame = new Sample();
          frame.setVisible(true);
}any helps arround this will deeply appreciated.
Thanks
Dorairaj M

Answer 1

Yes I realized about the solution
by setting empty border (BorderFactory.createEmptyBorder())
Thanks
Dorairaj M