Thread: Problem in reading image file

i am getting following errors when trying to read an image files pixel:

HTML Code:

F:\tm\final>java pixelcheck
1
2
no. of row is:-1
no. of col is:-1
Exception in thread "main" java.lang.NegativeArraySizeException
        at get3dimagepixelobj.get3ddata(get3dimagepixelobj.java:33)
        at pixelcheck.main(pixelcheck.java:15)

my image file is in f:\tm\final .
class file and image file is in same folder.

import java.awt.*;
import java.awt.event.*;
import java.awt.image.*;
 
class pixelcheck
{
  public static void main(String args[])
   {
 
	 get3dimagepixelobj j1=new get3dimagepixelobj();
 
 
	 int[][][] datareturned = new int[400][][];//size of image file is           //400X299
	 String fname="f2.jpeg";
	 datareturned=j1.get3ddata(fname);
      for (int i=0;i<4 ;i++ )
      {
      System.out.println(datareturned[0][0][i]);
 
	  }
 
   }
}

The other class get3dimagepixel obj is (few lines as it is very large):

import java.awt.*;
import java.awt.event.*;
import java.awt.image.*;
 
class pixeldetails
{
	int alpha;
	int red;
	int green;
	int blue;
	int area;
}
class get3dimagepixelobj extends pixeldetails
  {
    public int[][][] get3ddata(String imagefile)
	  {
	     //String imagefile;
         //Image rawimage=getImage(imagefile);
		 System.out.println("1");//to check the error
		 Image rawimage=Toolkit.getDefaultToolkit().getImage(imagefile);
	     		 System.out.println("2");//to check the error
		 int imagerows=rawimage.getHeight(null);
	               System.out.println("no. of row is:"+imagerows);//to check //the error
		 int imagecols=rawimage.getWidth(null);
				 System.out.println("no. of col is:"+imagecols);
		 // int imagecols=rawimage.getWidth(java.awt.image.ImageObserver);
	     int[] onedpix=new int[imagerows*imagecols];
         int[][][] threedpix=new int[imagerows][imagecols][4];
		 		 System.out.println("3.1");