Java SE (Java Platform, Standard Edition)

My application contains left pane where there are some buttons which are used to draw on the right side now I need to add scrollbars to right side......

code TreatModuleDraw

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
//import java.awt.Scrollbar.*;

import window.arrow.Arrow;

public class TreatModuleDraw extends JFrame implements ActionListener {

	
	private JButton start=new JButton("Start");
	private JButton stop=new JButton("Stop");		
	private JButton linear=new JButton("Linear");
	private JButton andsplit=new JButton("AND-Split");
	private JButton andmerge=new JButton("AND-Merge");
	private JButton orsplit=new JButton("OR-Split");
	private JButton ormerge=new JButton("OR-Merge");
//			ormerge.setSize(20,10);
	
final private int ELLIPSE = 1;
final private int RECT = 2;
private int shape=ELLIPSE;
private int x1=0,y1=70;

	private JPanel shapeSelectionPanel = new JPanel(new FlowLayout(FlowLayout.LEFT));

/**Constructor*/
    public TreatModuleDraw() {		shapeSelectionPanel.setBorder(BorderFactory.createLineBorder(Color.black));
        shapeSelectionPanel.setPreferredSize(new Dimension(100, 300));
		add(shapeSelectionPanel,BorderLayout.WEST);

/**adding buttons to the panel*/
		shapeSelectionPanel.add(start);
		shapeSelectionPanel.add(linear);
		shapeSelectionPanel.add(andsplit);
		shapeSelectionPanel.add(andmerge);
		shapeSelectionPanel.add(orsplit);
		shapeSelectionPanel.add(ormerge);
		shapeSelectionPanel.add(stop);
		
/**adding action listners to buttons*/
	  start.addActionListener(this);
	  linear.addActionListener(this);
	  	  andsplit.addActionListener(this);
		  	  andmerge.addActionListener(this);
			  	  orsplit.addActionListener(this);
				  	  ormerge.addActionListener(this);
					  	  stop.addActionListener(this);

					
    setSize(1024,400);


System.out.println("scroll bar aded");

		add(new DrawingPanel());
	}

	public static void main(final String args[]) {
		  TreatModuleDraw obj=new TreatModuleDraw();

		  obj.setVisible(true);
			  obj.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		}

//painting starts here

public void actionPerformed(final ActionEvent e) 
	{
		System.out.print("x="+x1);
		System.out.println("y="+y1);
		x1=x1+150;
        shape = ELLIPSE;
System.out.println("source"+e.getSource());
System.out.println(shape);

        if(e.getSource() == linear) shape = RECT;
    }

class DrawingPanel extends JPanel{// implements AdjustmentListener{

        private Image img;
        private Graphics2D g2;
        Scrollbar sb;

public DrawingPanel(){

JPanel jp=new JPanel();
int v=ScrollPaneConstants.VERTICAL_SCROLLBAR_ALWAYS;
int h=ScrollPaneConstants.HORIZONTAL_SCROLLBAR_ALWAYS;
JScrollPane jsp=new JScrollPane(jp,v,h);
getContentPane().add(jsp,BorderLayout.SOUTH);


           addMouseListener(new MouseAdapter() {
                public void mousePressed(MouseEvent e) {
                    drawShape(x1,y1);
                }
            });
      }//end of constructor       		
			
		public void paintComponent(final Graphics g){
            if(img == null){
                img = createImage(getWidth(), getHeight());
                g2 = (Graphics2D)img.getGraphics();
            }
            g.drawImage(img,0,0,null);
        }

        private void drawShape(final int x, final int y) {
			System.out.println(shape);

            switch (shape){
                case RECT: g2.drawRect(x,y,100,50);
				 Arrow.drawHorizArrow(g2, Color.red,    x1-50,  95,  50,  Arrow.RIGHT);
				System.out.println("rect");
				break;

                case ELLIPSE: g2.drawOval(x,y,100,50);
			 Arrow.drawHorizArrow(g2, Color.red,    x1-50,  95,  50,  Arrow.RIGHT);
								System.out.println("ellipse");
            }
            repaint();
        }
    }//drawing class close
}//end of TreatModuleDraw

This is Arrow Class Code

package window.arrow;

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

public class Arrow
{
  //  static Font font = new Font("lucida sans demibold", Font.PLAIN, 18);
    public static final int
        UP    = 0,
        LEFT  = 1,
        DOWN  = 2,
        RIGHT = 3;
 
    /**
     * (x,y) is the left end of the arrow
     */
    public static void drawHorizArrow(Graphics2D g2, Color color, int x, int y,
                                     int length, int orientation)
    {
        Color origColor = g2.getColor();
        g2.setPaint(color);
        g2.draw(new Line2D.Double(x, y, x + length, y));
        if(orientation == LEFT)
        {
            g2.draw(new Line2D.Double(x, y, x + 8, y - 8));
            g2.draw(new Line2D.Double(x, y, x + 8, y + 8));
        }
        else
        {
            g2.draw(new Line2D.Double(x + length, y, x + length - 8, y - 8));
            g2.draw(new Line2D.Double(x + length, y, x + length - 8, y + 8));
        }       
    }     
    /**
     * (x,y) is the top of the arrow
     */
    public static void drawVertArrow(Graphics2D g2, Color color, int x, int y,
                                     int length,  int orientation)
    {
        Color origColor = g2.getColor();
        g2.setPaint(color);
        g2.draw(new Line2D.Double(x, y, x, y + length));
        if(orientation == UP)
        {
            g2.draw(new Line2D.Double(x, y, x - 8, y + 8));
            g2.draw(new Line2D.Double(x, y, x + 8, y + 8));
        }
        else
        {
            g2.draw(new Line2D.Double(x, y + length, x - 8, y + length - 8));
            g2.draw(new Line2D.Double(x, y + length, x + 8, y + length - 8));
        }
       
    }
}

Please Help me in adding the scrollbars to the right pane

Thanx in Advance