My scrollbars are not displaying

[shalini gnana]

Why my scrollbars are not getting displayed..Where do i gone wrong?

    
 
package javaapplication5;
 

import java.awt.event.MouseListener;
import java.awt.geom.Ellipse2D;
import java.awt.geom.Line2D;
import java.awt.geom.Point2D;
import java.text.DateFormat;
import java.util.ArrayList;
import java.util.Calendar;
import java.util.Date;
import javax.swing.*;
import java.awt.*;
import java.awt.BorderLayout;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import javax.swing.BorderFactory; 
import javax.swing.border.Border; 
 
public class Main  extends JApplet 
{        
    String s= "aswedfrtyhgqwsadrftlopqasnhfgrchildnode1";    
    int width = s.length();    JScrollPane scroll ;      
    int border = 2;    int margin = 10;    
    int rectx = margin+border,recty =margin+border+63;    
    int rectwidth = 8, rectheight = 6;    
    int imgborder = 10;    
    int imgline1 = 300;   
    int labellocx = rectx+imgborder+13;   
    int labellocy = recty+imgborder-1;    
    int circlex = rectx+rectwidth; 
    int circley = recty+rectheight;   
    int x =rectx+rectwidth+10;   
    int y = recty+rectheight+10; 
    int x1 = x+17;  
    int y1 = y+20;   
    int titlebarx= 300;
    int titlebary = 40;   
    boolean title = true; 
    String date[] = {"0","4","8","12","16","20","24"};  
    String day[] = {"Mon","Tue","Wed","Thu","Fri","Sat"};
    int width1 = 180;
//    int f2= x+168;
    int n =180;
//    int dayx = 385;
    long From,To;
    double Difference;
    long days;
    ArrayList dateList;
    Calendar calendar;
    Imagepanel image;
    
 
    public void init()      
    {               
        Container cont = getContentPane();    
        // to see the scrollpane, the scrollpane has to be smaller         
        // then the component held within its viewport              
        setPreferredSize(new Dimension(300, 300));          
        
                     
//        getContentPane().add(scroll, BorderLayout.CENTER);    
       image = new Imagepanel();
        add(image);        
    }      
    private class Imagepanel extends JPanel implements MouseListener  
    {              
        JLabel label;             
        //JScrollPane scroll = new JScrollPane();       
        Rectangle rect = new Rectangle(rectx,recty,rectwidth,rectheight);        
        Ellipse2D.Double circle = new Ellipse2D.Double(x,y,4,4);    
        Ellipse2D.Double circle1 = new Ellipse2D.Double(x+10,y+10,4,4);     
        boolean selected = false;   
        boolean selected1 = false;      
        int w ;      
    Imagepanel()        
    {               
        // setting the component to be largenr than the scrollpane            
        // just so we'll see scrollbars. 
        dateList = new ArrayList();
        setPreferredSize(new Dimension(32710,32710));       
        scroll = new JScrollPane();      
        scroll.getViewport().add(this);
//        add(scroll);              
        addMouseListener(this);        
        label = new JLabel();      
        label.setFont(new Font(" Verdana",Font.PLAIN,10));// 
        scroll.add(label);      
        add(label);        label.getPreferredSize();       
        label.setLocation(labellocx,labellocy);       
        setBorder(BorderFactory.createLineBorder(Color.BLACK, border));           
        From = new java.util.GregorianCalendar(2007,01,01).getTime().getTime();
        To = new java.util.GregorianCalendar(2007,06,30).getTime().getTime();
            Difference = To-From;
            days = Math.round((Difference/(1000*60*60*24)));
            int noday = (int)days;
            System.out.println(noday);
            for(int i =0;i<dateList.size();i++)
            {
                System.out.println(dateList.get(i));
            }
    }             
    protected void paintComponent(Graphics g)          
    {         
        int x = 300;
        int x1=300;
        int x2=x;
        int daydx=(width1/2);
        int dayx =daydx +x;
        int f2= x+168;
        
        super.paintComponent(g);             
        Graphics2D g2 = (Graphics2D) g;              
        g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING,RenderingHints.VALUE_ANTIALIAS_ON);        
        
        Font font = new Font("Ariel",Font.PLAIN,11);  
        Font font1 = new Font("Ariel",Font.PLAIN,9);
        
        g2.setBackground(Color.GRAY);
        
        //drawing the tilte bar      
        g2.setBackground(Color.WHITE);   
        g2.drawLine(imgline1,0,imgline1,getHeight());  
        g2.setPaint(new Color(0,128,192));
        g2.fillRect(imgborder,imgborder,290,45);
        //g2.setPaint(Color.GRAY);
        //g2.setStroke(new BasicStroke(2));              
         
        //g2.setPaint();m
        //g2.drawLine(margin,margin,titlebarx,titlebary);               
        //drawing the root node and labeling       
        g2.draw(rect); 
        g2.setPaint(Color.WHITE);
        g2.drawLine(margin,margin,titlebarx,titlebary);  
        g2.drawString("RESOURCE",40,40);        
        g2.drawString("TIME",200,25);
        
        
        rect.setLocation(rectx,recty);       
        rect.setSize(rectwidth,rectheight); 
        g2.setPaint(Color.BLACK);
        g2.drawString(" aswedfrtyhgqwsadrftlopqasnhfgrchildnode1",rectx+rectwidth+05,recty+rectheight);                
        for (int i = 0;i<180;i++)
        {
            for (int j=0;j<6;j++)
            {   
 
                g2.setFont(font1);
                g2.drawLine(x1,40,x1,35);
                g2.drawString(date[j],x1,35);
//                g2.drawString(day[j],dayx,20);
                g2.drawString("24",f2,35);
                f2+=width1;
                x1+=30;
//                dayx=+170;
                   
        
            }
            g2.drawRect(x,10,width1,30);
            x+=width1;
        }
        
        for(int k=0;k<n;k++)
        {
            for(int l=0;l<6;l++)
            {
            g2.drawString(day[l],dayx,20);
            dayx+=180;
            }
            
            
        }
        
        
      
        //dividing the drawing panel       
        //drawing for the click event        
        if(selected)        
        {                 
            Color color = Color.orange;  
            g2.fill(circle);
            g2.draw(circle);           
            //              g2.drawRoundRect(x+30,y+15,200,12,5,5);         
            g2.drawString("aswedfrtyhgqwsadrftlopqasnhfgrchildnode1",x+15,y+5);      
            g2.drawRect(300,y,100,15);       
        }       
        if(selected1)       
       {           
            g2.setFont(new Font("Arial",Font.PLAIN,12));  
            g2.fill(circle1);
            g2.draw(circle1);            
            g2.drawString(" aswedfrtyhgqwsadrftlopqmasnhfgrchildnode1",x1+15,y1+5);   
        }                                 
}  
public  ArrayList getDatesBetween(Date fromDate, Date toDate) 
{
Calendar calendar = Calendar.getInstance();
dateList = new ArrayList();
fromDate =  new Date(2007/01/01);
toDate = new Date(2007/01/10);
if (fromDate.before(toDate)) 
{
Date dateCounter = fromDate;
dateList.add(fromDate);
while (dateCounter.before(toDate)) 
{
calendar.setTime(dateCounter);
int nextDate = calendar.get(Calendar.DATE) + 1;
 
calendar.set(Calendar.DATE,nextDate);
dateCounter = calendar.getTime();
DateFormat df= DateFormat.getInstance();
String date = df.format(dateCounter);
dateList.add(dateCounter);
}
}else if(!fromDate.before(toDate) && !fromDate.after(toDate)){
dateList.add(fromDate);
}
return dateList;
} 
 
    public void update(Graphics g)     
    {         
        paint(g);    
    }    
    public void mouseClicked(MouseEvent e)           
    {                       
        //imagePaneMouseClicked(e);               
    }                   
    private void imagePaneMouseClicked(MouseEvent e)         
    {                    
        Point p = e.getPoint();          
        if (rect.contains(p))                   
        {                        
            if (!selected)               
            {                            
                selected = true;         
                repaint();                
            }                    
        }        
        if(circle.contains(p))      
        {     
            if(!selected1)            
            {                
                selected1 = true;     
                repaint();            
            }      
         }        
        if(rect.contains(p))  
        {       
            if(e.getClickCount() == 2)     
            {           
                selected = false;   
                repaint();       
            }       
        }        
    }              
    public void mousePressed(MouseEvent e)         
    {            
    imagePaneMouseClicked(e);             
    }                
    public void mouseReleased(MouseEvent e) {        }                
    public void mouseEntered(MouseEvent e) {        }           
    public void mouseExited(MouseEvent e) {        }        
}
}

[Ulf Dittmer]

"scroll" is null at the time you're adding it to the content pane. It needs to be initialized at that time (and you should definitely not do that in the ImagePanel class, but in the init method of the applet).