Error reading image from InputStream (I/O and Streams forum at Coderanch)

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i am getting NegativeArraySizeException in line
img = ImageIO.read(is);

InputStream is = sock.getInputStream(); //sock is the Socket
BufferedImage img = null;
	img = ImageIO.read(is);
catch(IOException ioe){ System.out.println("Error reading image from client"); }
catch(IllegalArgumentException iae){ System.out.println("IllegalArgumentException caught"); }
catch(Exception e) { System.out.println("Exception caught" + e); }
<p>Preparing SCJP 1.6</p>
<div class="clear"/><div class="postText ">Welcome to the JavaRanch.
<br/> The only thing I can think of is that the data you are reading is not an image file.  Try just writing the data to disk and opening it with an image viewer.  Do you have control of the other side of the socket?  How is the image written?</div><div class="clinks">
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				<cite>Joe Ess wrote:</cite>The only thing I can think of is that the data you are reading is not an image file.</p>
		</blockquote>
<br/> Then ImageIO.read should return null, not throw an exception.
<br/> 
<br/> Anil, can you show us the complete stack trace?</div><div class="clinks">
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<div class="clear"/><div class="postText ">Friends, its solved
<br/> i have control over other side of the socket.
<br/> 
<br/> i have changed the image type while i write it to OutputStream
<br/> 
<br/> from this
<br/>      ImageIO.write(image, "jpeg", os);
<br/>      // os is the OutputStream
<br/> to this
<br/>      ImageIO.write(image, "BMP", os);
<br/> 
<br/> now it runs perfectly
<br/> 
<br/> thanks for your advice.</div><div class="clinks">
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