Help for code

Question

I am unable to recognize the problem in the following code. My paint() in defined in a class ImagePanel and I am unable to access paint() from outside.
Please Help!
import javax.swing.*;
import javax.swing.event.*;
import java.io.*;
import javax.media.*;
import javax.media.format.*;
import javax.media.util.*;
import javax.media.control.*;
import javax.media.protocol.*;
import java.util.*;
import java.awt.*;
import java.awt.image.*;
import java.awt.event.*;
import com.sun.image.codec.jpeg.*;
import javax.media.*;
import javax.media.protocol.*;
import javax.media.control.*;
import javax.media.format.*;
import javax.media.util.BufferToImage;
import java.io.IOException;
import java.net.*;
import java.awt.*;
////////////////////FROM GESTURE
import java.io.*;
import java.awt.*;
import java.awt.image.*;
import java.applet.*;
import java.util.*;
import java.lang.*;
//import Gesture.class;
import com.sun.image.codec.jpeg.*;
import sun.awt.image.BufferedImageGraphics2D;
public class SwingCapture extends Panel implements ActionListener, Runnable { 
public static Player player = null; 
public CaptureDeviceInfo di = null; 
public MediaLocator ml = null; 
public JButton capture = null; 
public Buffer buf = null; 
public Image img = null; 
//public VideoFormat vf=null
public BufferToImage btoi = null; 
public ImagePanel imgpanel = null;   
Thread thr;
String str1=new String();
//from gesture
int xcentre, ycentre,ij;
     static int iw = 320;
     static int ih = 240;
     static int  attenH = 400;
     static int attenW = 200;
     static int PIXCOUNTBB=5;
     static int IMIN=40;   //approximate location of hand
    static int IMAX=239;
    static int JMIN=5;
    static int JMAX=300;
     Image imgprocess;
     Image im;
     int xmin,xmax,ymin,ymax;
int pix_fill[][]= new int [320][240];
int pixel2[] = new int[76800];
int pixel3[] = new int[76800];
int pixel4[] = new int[76800];
int pixel5[] = new int[76800];
int pixel6[] = new int[attenH * attenW];
double arr[][] = new double[21][2];
int flag = 0;
int ixmean = 0;
int iymean = 0;
//MyThread thread ;
int threadflag = 1;
public SwingCapture()   {
     setLayout(new BorderLayout());   
//setSize(320,550);
//setSize(320,550);      
imgpanel = new ImagePanel();   
capture = new JButton("Capture");   
capture.addActionListener(this);       
//String str1 = "vfw:Philips USB PC-Camera:0";   
//String str2 = "vfw:Microsoft WDM Image Capture:2"; 
//String str3 = "vfw:Video Blaster WebCam Go (VFW):0";  
  String str3 = "vfw:Video Blaster WebCam 3/WebCam Plus (VFW):1";  
System.out.println("sur");
  String str2= "vfw:Microsoft WDM Image Capture (Win32):0";
di =(CaptureDeviceInfo) CaptureDeviceManager.getDevice(str3);
System.out.println("sur" + di);
ml = di.getLocator();       
try     {     
player = Manager.createRealizedPlayer(ml);     
player.start();     
Component comp;           
if ((comp = player.getVisualComponent()) != null)                   
      {add(comp,BorderLayout.NORTH);     
add(capture,BorderLayout.CENTER);     
add(imgpanel,BorderLayout.SOUTH);}   
catch (Exception e)    
          e.printStackTrace();   
thr = new Thread(this);
public static void main(String[] args)   {   
Frame f = new Frame("SwingCapture");   
SwingCapture cf = new SwingCapture();       
f.addWindowListener(new WindowAdapter() {      //overriding windowClosing
                                         public void windowClosing(WindowEvent e) {     
                                         playerclose();     
                                         System.exit(0); }       
f.add("Center",cf);   
f.pack();   
f.setSize(new Dimension(320,550));   
f.setVisible(true);
/*for(int i=0;i<=10;i++)
     FrameGrabbingControl fgc = (FrameGrabbingControl)  player.getControl("javax.media.control.FrameGrabbingControl");     
buf = fgc.grabFrame();           
// Convert it to an image     
btoi = new BufferToImage((VideoFormat)buf.getFormat());     
img = btoi.createImage(buf);           
// show the image     
imgpanel.setImage(img);
Gesture(img);
imgprocess.flush();
img.flush();
try{
     Thread.sleep(10000);}
     catch(Exception e1){};
public static void playerclose()   {   
player.close();   
player.deallocate(); 
public synchronized void actionPerformed(ActionEvent e)   {   
JComponent c = (JComponent) e.getSource();       
if (c == capture)     {
     //thread started
     thr.start();
     while(ij<=7)
       if(threadflag ==1)
           try{
          System.out.println("Waiting");
                 wait();
                 System.out.println("Finished Waiting");
            catch(Exception e3)
            threadflag =0;
            System.out.println("Back");
            imgpanel.callPaint("<");
            threadflag=1;
            notify();
public synchronized void run()
       ij = 0;
       while(ij<=7)
     if(threadflag ==1)
          //for( ij = 0; ij<=20;ij++)
// Grab a frame   
//this.imgpanel=imgpanel;
System.out.println("ij : " + ij);
FrameGrabbingControl fgc = (FrameGrabbingControl)  player.getControl("javax.media.control.FrameGrabbingControl");     
System.out.println("After buf1 " + fgc);
buf = fgc.grabFrame();
System.out.println("After buf " + buf);
// Convert it to an image     
btoi = new BufferToImage((VideoFormat)buf.getFormat());     
System.out.println("After btoi "+ btoi);
img = btoi.createImage(buf);
System.out.println("After img "+ img);
//imgpanel.callpaint(">");
// show the image     
//System.out.println("rhododendron");
//imgpanel.setImage(imgprocess);
//System.out.println("cacatua");
//pixel2=Gesture(img);
Gesture(img);
//imgpanel.repaint();
//repaint();
System.out.println("After Gesture");
//String str = new String("C:\\test");
               //str = str + ij + ".jpg";
//System.out.println("After ");               
          //     SaveImage(str,imgprocess);
//imgprocess=createImage(new MemoryImageSource(iw,ih,pixel2,0,iw));
//repaint();
/*try{
     Thread.sleep(10000);}
     catch(Exception e1){};*/
//imgprocess.flush();
//img.flush();
ij++;
System.out.println("ij: " + ij);
threadflag = 0;
notify();
//System.out.println("After Notify");
if(threadflag==0)
     try{
     wait();
//     notify();
//repaint();
     catch(Exception e2)
//System.out.flush();
/*flag =1;
     int cntleft=0;
     int cntright=0;
for(int i=1;i<=7;i++)
    if(arr[i-1][0]<arr[0])
     cntright++;
else
          cntleft++;
if(cntleft>5)
     str1 = "Moving right";
     System.out.println("Moving right");
     imgpanel.callPaint(str1);
     else
if(cntright>5)
     str1 = "Moving left";
          System.out.println("Moving left");
     imgpanel.callPaint(str1);
else
     str1 = "No Movement";
          System.out.println("No Movement");
     imgpanel.callPaint(str1);
/*class MyThread extends Thread
MyThread()
     if(threadflag ==1)
          wait();
     else
          threadflag =0;
          imgpanel.callPaint();
          threadflag=1;
          notify();
class ImagePanel extends Panel {   
public Image myimg = null;
String str2 = new String();
public ImagePanel() {     
setLayout(null);
setSize(320,240);
public void setImage(Image img) {     
//System.out.println("cacatua");
//this.myimg = img;
//repaint();
public void callPaint(String st)
     //this.str2 = st;
     System.out.println("in callPaint");
     System.out.println("xmean: "+ixmean);
     imgpanel.repaint();
     System.out.println("in out callPaint");
public void paint(Graphics g) {     
//if (myimg != null) {  
//g.drawImage(imgprocess, 0, 0, null);
     System.out.println("xmean: "+ixmean);
     //System.out.println("in Paint of imgpanel");
//g.drawImage(imgprocess,0,0,null);
//if(flag==1)
//g.drawString(str2, 20,20);
//     else
          //repaint();
          g.drawString(">",ixmean,iymean);
          //repaint();
//g.drawImage(imgprocess,0,0,null);
//class Gesture //extends Applet
     /*int xcentre, ycentre;
     static int iw = 320;
     static int ih = 240;
     static int attenH = 400;
     static int attenW = 200;
     static int PIXCOUNTBB=5;
     static int IMIN=40; //approximate location of hand
static int IMAX=239;
static int JMIN=5;
static int JMAX=300;
     Image imgprocess;
     Image im;
     int xmin,xmax,ymin,ymax;
int pix_fill[][]= new int [320][240];
int pixel2[] = new int[76800];
int pixel3[] = new int[76800];
int pixel4[] = new int[76800];
int pixel5[] = new int[76800];
int pixel6[] = new int[attenH * attenW];
     //public int intensity(int pix[][], int x, int y)*/
     public int intensity(int pix[][], int x, int y)
     int p, r, g, b, inten;
          //p=pix[x][y];
p=pix[x][y];
          r = 0xff & p>>16 ;
          g = 0xff & p>>8;
          b = 0xff & p;
          //inten = (int)(0.33 * r + 0.56 g + 0.11b);
          inten = (int)(0 * r + 0 g + 0.11b);
          //inten = (int)( 0.11*b);
          return(int)(inten);
public int min(int x, int y)
     if(x<y)
               return(x);
          else
               return(y);
     //public void init()
     public void Gesture(Image im)
          //int pixel3[] = new int[80000];
          //int pixel2[] = new int[76800];
     int whitepix=0;
          int coord[][] = new int[2][256];
          //int ymin, xmax,ymax,xmin;
          int no_elem_comp[] = new int[76800];
          int count = 0;
          float pskin[][] = new float[241][241];
          float pnoskin[][] = new float[241][241];
          int num = 0;
          String imname;
          //Image im;
          for(int i=0;i<2;i++)
               for(int j=0;j<256;j++)
               coord[i][j] = 0;
          //imname = getParameter("img");
          //im = getImage(getDocumentBase(),imname);
          int pixels[] = new int [iw * ih];
          int pix[][] = new int[iw][ih]; //changed iw and ih
          FileReader fr;
          BufferedReader br ;
          String s = new String();
          int l;
          int total;
          PixelGrabber pg = new PixelGrabber(im,0,0,iw,ih,pixels,0,iw);
          try
               pg.grabPixels();
          catch(InterruptedException e) {}
          int size = iw * ih;
          for(int m=240; m<480;m++)
               //System.out.println(m + " : " + pixels[m] );
               int p = pixels[m];
               int r = 0xff & (p>>16);
               int g = 0xff & (p>>8);
               int b = 0xff & (p);
               //System.out.println("r : " + r + " g : " + g + " b : " + b);
          //imgprocess=createImage(new MemoryImageSource(iw,ih,pixels,0,iw));
          //repaint();
          ///////controller
          float C[][] = new float[16][size];
          for(int i=0;i<16;i++)
               for ( int j=0;j<size;j++ )
               C[i][j]=0;
          //System.out.println("End Controller");
////////fingerinit
          try{
          fr = new FileReader("skin");
          br = new BufferedReader(fr);
          //String s;
          s=br.readLine();
          l = Integer.parseInt(s);
          System.out.println("l : " + l);
          s=br.readLine();
          total = Integer.parseInt(s);
          System.out.println("total : " + total);
String val = new String();
          for(int i=0; i<241; i++)
for(int j=0; j<241; j++)
     s=br.readLine();
     int intval = Integer.parseInt(s);
          //pskin[i][j] = ((float)intval)/total;
     pskin[i][j] = (float)intval;
          fr.close();
          catch(Exception e)
          {System.out.println("Hello");
try{
     fr = new FileReader("noskin");
     br = new BufferedReader(fr);
          s=br.readLine();
     l = Integer.parseInt(s);
          s=br.readLine();
     total = Integer.parseInt(s);
          for(int i=0; i<241; i++)
for(int j=0; j<241; j++)
     s=br.readLine();
     int intval = Integer.parseInt(s);
          //pskin[i][j] = ((float)intval)/total;
     pnoskin[i][j] = (float)intval;
          fr.close();
          catch(Exception e)
               System.out.println("Here:");
System.out.println("after noskin");
          float A[][] = new float[size+1][20];
          try{
System.out.println("in try");
          fr = new FileReader("svdnewdata");
          if(fr==null)
               System.out.println("Could not open svdnewdata ");
               System.exit(0);
          br = new BufferedReader(fr);
          for(int i1=0;i1<size;i1++)
               s=br.readLine();
               StringTokenizer st =new StringTokenizer(s,"\t");
               //System.out.println("svd :" + s);
               for(int j1=0;j1<20;j1++)
                         String val = st.nextToken();
               //          System.out.println("val : " + val);
                         int intval=Integer.parseInt(val);
                         A[i1][j1]=intval;
          fr.close();
          catch(Exception e)
               System.out.println("surbhi");
System.out.println("after svdnewdata");
          ////////Process
          int points[][] = new int[2][size];
          int colors[][] = new int[3][size];
          int data[][] = new int[2][size];
          float prob[] = new float[size];
          ////////fingerpoint
          for(int i=0;i<size;i++)
               int p = pixels[i];
               int r=0xff & (p>>16);
               int g=0xff & (p>>8);
               int b=0xff & (p);
               colors[0][i] = r;
colors[1][i] = g;
               colors[2][i] = b;
               data[0][i] = (int)(i/iw)-1;
               data[1][i] = (int)(i%iw)-1;
float Cb_f = (float)(((-4818.0*r - 9527.0*g + 14345.0*b)/32768.0)+128.5);
               float Cr_f = (float)(((14345.0*r - 12045.0*g - 2300.0*b)/32768.0)+128.5);
               int Cb = (int)Cb_f;
               int Cr = (int)Cr_f;
                              //System.out.println("Cb :" + Cb);
                              //System.out.println("Cr :" + Cr);
               if(pnoskin[Cb][Cr] ==0)
//System.out.println("sur :" );
                    prob[i]=1;
               else
                    prob[i]=pskin[Cb][Cr]/pnoskin[Cb][Cr];
          //System.out.println("anui");
for(int a=0;a<size ;a++)
     if( prob[a]>0.05)
     //     { System.out.println("Ishsani"); 
          pixel2[a]=0xff000000 | 0x000000ff;//}
     else
     //     {System.out.println("Ishsani11");
          pixel2[a]=0xff000000 | 0x00ff0000;
               int k=0;
               int buffer[] = new int[3];
               //int pix[][] = new int[ih][iw];
               for(int i=0;i<ih;i++)
                    for(int j=0;j<iw;j++)
                    pix[j][i]= pixel2[k++];
//System.out.println("out k:" + k);
               for(int i=1;i<ih-1;i++)
               for(int j=1;j<iw-1;j++)
                    whitepix = 0;
                    for(int i1=i-1;i1<=i+1;i1++)
                         for(int j1=j-1;j1<j+1;j1++)
                    buffer[0]= 0x000000ff & (pix[j1][i1]>>16);
                    buffer[1]= 0x000000ff & (pix[j1][i1]>>8);
                         buffer[2]= 0x000000ff & (pix[j1][i1]);
                         //if(((buffer[0]==-1)&&(buffer[1]==-1))||((buffer[2]==-1)&&(buffer[1]==-1))||((buffer[0]==-1)&&(buffer[2]==-1)))
                         if(buffer[2]==255)
                              whitepix++;
                    if(whitepix>=3)
                         //pix[j][i] = (255<<24) | (255 << 16) | (255<<8) | (255);
                         pix[j][i] = 0xff000000 | 0x000000ff;
          //               System.out.println("if : " + pix[j][i]);
                    else
                         //pix[j][i] = 0xff|(0<<16)|(0<<8)|0;
                         pix[j][i] = 0xff000000 | 0x00ff0000;
          //               System.out.println("else : " + pix[j][i]);
               }//end for
     int b=0;
               for(int i=0;i<ih;i++)
               for(int j=0;j<iw;j++)
                    pixel2[b++] = pix[j][i];
//imgprocess=createImage(new MemoryImageSource(iw,ih,pixel3,0,iw));
//repaint();
          IdenOutline(pix);
          IdenOutline(pix_fill);
          IdenOutline(pix_fill);
          IdenOutline(pix_fill);
          IdenOutline(pix_fill);
          IdenOutline(pix_fill);
          //IdenOutline(pix_fill);
calcBoundary();
          System.out.println("xmax : " + xmax + " xmin : " + xmin);
System.out.println("ymax : " + ymax + " ymin : " + ymin);
          BBox();
          CalcMvt();
          b=0;
               for(int i=0;i<ih;i++)
               for(int j=0;j<iw;j++)
                    pixel2[b++] = pix_fill[j][i];
//imgpanel.callPaint(">");
//imgpanel.repaint();
// imgprocess.flush();
//imgprocess=createImage(new MemoryImageSource(iw,ih,pixel2,0,iw));
//repaint();
//thread.start();
//try{
//wait();
//catch(Exception e)
//imgpanel.callPaint(">");
//repaint();
//imgprocess.flush();
/*          public void run()
               imgpanel.callPaint(">");
               notify();
/*public void paint(Graphics g)
     g.drawString(str1, 310,300);
     System.out.println("Came in paint");
//g.drawString("Coordinates of the Centroid is "+ xcentre + " , " + ycentre , 10,40);
//g.drawImage(imgprocess,0,0,null);
     //System.out.println("Came in paint out");
//g.drawImage(im,0,0,this);
//if(imgprocess==null){
          System.out.println("ishani1");
          //imgprocess=createImage(new MemoryImageSource(iw,ih,pixel2,0,iw));
          //repaint();
     System.out.println("ishani2");
//g.drawImage(imgprocess,0,0,null);
//g.drawImage(imgprocess,0,400,null);
System.out.println("ishani3");
//repaint();
void BBox()
for(int i=xmin ; i<=xmax;i++)
     pix_fill[i][ymax] = 0xff0000ff;
     pix_fill[i][ymin] = 0xff0000ff;
     System.out.println("Came here");
     for(int j=ymin;j<=ymax;j++)
          pix_fill[xmax][j] = 0xff0000ff;
pix_fill[xmin][j] = 0xff0000ff;
     System.out.println("Came here2");
void calcBoundary()
int minrow,maxrow,mincol,maxcol,flag=0;
     minrow=maxrow=mincol=maxcol=0;
     for(int i=0;i<ih;i++)
     for(int j=0;j<iw;j++)
     if(pix_fill[j][i] == 0xff0000ff)
          flag = 1;
          minrow = i;
          break;
     if(flag==1)
     break;
     flag=0;
for(int i=(ih-1);i>=0;i--)
     for(int j=0;j<iw;j++)
          if(pix_fill[j][i] == 0xff0000ff)
               flag =1;
               maxrow=i;
               break;
          if(flag==1)
          break;
     flag =0;
for(int j=0;j<iw;j++)
     for(int i=0;i<ih;i++)
          if(pix_fill[j][i] == 0xff0000ff)
               flag=1;
               mincol = j;
               //System.out.println("row : " + i + " Col : " + mincol);
               break;
          if(flag==1)
               break;
     flag =0;
for(int j=(iw-1);j>=0;j--)
     for(int i=0;i<ih;i++)
          if(pix_fill[j][i] == 0xff0000ff)
               flag =1;
               maxcol = j;
               System.out.println("row : " + i + " Col : " + maxcol);
               break;
          if(flag==1)
break;
xmax = maxcol;
xmin = mincol;
ymax = maxrow;
ymin = minrow;
return;
void IdenOutline(int pix_temp[][])
     int n,k,l,i,j;
     for(i=0;i<ih;i++)
          for(j=0;j<iw;j++)
     if(pix_temp[j][i]==0xffff0000)
                    continue;
               else
                    for(k=1;(j+k)<320;k++)
                    if(pix_temp[j+k][i]!=0xffff0000)
                    continue;
                    else
                         break;
                         for(l=1;(i-l)>0;l++)
                    if(pix_temp[j][i-l]!=0xffff0000)
                              continue;
                         else
                                        break;
                                   /*for(m=1;j-m>0;m++)
                                        if(pix_fill[j-m][i])!=0xff0000ff)
                                        continue;
                                   else*/
                                             for(n=1;(i+n)<240;n++)
                    if(pix_temp[j][i+n]!=0xffff0000)
                                             continue;
                                             else
break;
                                                  if((k<15)&&(n<20)&&(l<20))
                                                       pix_temp[j][i]=0xffff0000;
                                                  else
                                                                 if((k<15)&&(l<10)&&(n>10))
pix_temp[j][i]=0xff0000ff;
                                                            else
                                                                      if((n<10)&&(k<15)&&(l>10))
                                                                      pix_temp[j][i]=0xff0000ff;
                                                                 else
                                                                      if((n<10)&&(l<10)&&(k>15))
                                                                      pix_temp[j][i]=0xff0000ff;
int b1=0;
                    for(int a=0;a<ih;a++)
                    for(int d=0;d<iw;d++)
                    pixel2[b1++] = pix_temp[d][a];
                    pix_fill[d][a] = pix_temp[d][a];
//imgprocess=createImage(new MemoryImageSource(iw,ih,pixel4,0,iw));
          //repaint();
public void SaveImage(String s,Image im)
     System.out.println("i m here" + im);
     /* try{
          Thread.sleep(1000);
     catch(Exception e)
     //BufferedImage bi = new BufferedImage(im.getWidth(null, im.getHeight(null), BufferedImage.TYPE_INT_RGB);
BufferedImage bi = new BufferedImage(320, 240, BufferedImage.TYPE_INT_RGB);
     System.out.println("i m here" + bi);
     Graphics2D g2 = bi.createGraphics();
     g2.drawImage(im, null, null);
     System.out.println("i m here" + g2);
     FileOutputStream out = null;
     try {      
          out = new FileOutputStream(s);
     catch (java.io.FileNotFoundException io)
          System.out.println("File Not Found");
JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(out);
     JPEGEncodeParam param = encoder.getDefaultJPEGEncodeParam(bi);
     param.setQuality(0.5f,false);
     encoder.setJPEGEncodeParam(param);
     try
          encoder.encode(bi);
          out.close();
     catch (java.io.IOException io)
          System.out.println("IOException");
     public void CalcMvt()
          double xmean=(xmax+xmin)/2;
          double ymean=(ymax+ymin)/2;
          ixmean = (int) xmean;
          iymean = (int)ymean;
          arr[ij][0]= xmean;
          arr[ij][1]=ymean;
     }//end of class
/*public class SCapture
public static void main(String[] args) {   
Frame f = new Frame("SwingCapture");
SwingCapture cf = new SwingCapture();
f.addWindowListener(new WindowAdapter() {      //overriding windowClosing
public void windowClosing(WindowEvent e) {     
playerclose();
System.exit(0); }
f.add("Center",cf);
f.pack();
f.setSize(new Dimension(320,550));
f.setVisible(true);*/
/*for(int i=0;i<=10;i++)
     FrameGrabbingControl fgc = (FrameGrabbingControl) player.getControl("javax.media.control.FrameGrabbingControl");
buf = fgc.grabFrame();
// Convert it to an image
btoi = new BufferToImage((VideoFormat)buf.getFormat());
img = btoi.createImage(buf);
// show the image
imgpanel.setImage(img);
Gesture(img);
imgprocess.flush();
img.flush();
try{
     Thread.sleep(10000);}
     catch(Exception e1){};

Answer 1

Not sure exactly what you mean...
Here, try this sample, use your ImagePanel with a standard frame. Just add the panel to the frame, make the frame visible, shrink and restore it a few time, see if your paint method gets called...
If it works correctly, good, you know the ImagePanel is fine, and yout problem is with your other class. If it doesn't work, then concentrate on your ImagePanel and explain exactly HOW it doesn't work... (like any errors, what gets shown/printed to the command line, exactly how it misbehaves...
public void ImagePanelTest extends Frame {
  public ImagePanelTest (String title) {
    super(title);
  public void main(String[] args) {
    ImagePanel ip = new ImagePanel();
    ImagePanelTest ipt = new ImagePanelTest("ImagePanel Test");
      ipt.add(ip);
      ipt.setSize(new Dimension(300,300));
      ipt.addWindowListener(new WindowAdapter() {
        public void windowClosing(windowEvent we) {
          dispose();
          System.exit(0);
      ipt.show();
  }