Submit Statment inside Loop - Problem in display O/P

Hi All,
Iam Using Submit statment inside the Loop with Return , when the first line in the loop completes the O/P gets display and the Second line is not processed and get in O/P.Can any one let me know why this problem occurs?...
Regards,
Veera

when You submit for a report it starts a parallel process and it is O/P then if you are doign it in loop it may be over writing the existing O/P that may be the reason you are not seeing the out put properly as it is written across different internalk sessions

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          response.setContentType("image/jpeg");
          response.addHeader("Content-Disposition","filename=42.jpeg");
                ServletOutputStream ostr=response.getOutputStream();
               InputStream istr=blob.getBinaryStream(1L);
                int size=blob.getBufferSize();
          int len=-1;
                byte[] buff = new byte[size];
                     while ((len=istr.read( buff ))!=-1 ) {
               ostr.write(buff,0,len);
         response.flushBuffer();
         ostr.close(); and my JSP page code :
<img src="/ImageServlet" border="0" > If you could just tell me what i'm doing wrong here , or if you could show me your own solutions to that problem , i would be very greatful ,cos i'm realy stuck here , and i'm rather pressed for time too. Hope someone can help.

I turns out that it wasn't that big of a problem after all. All i had to do was to take the above code and place it into another JSP page instead of into a servlet like i did before. Then i just used that page as a source for my IMG tag in my first JSP. It works perfectly well. Why this doesn't work for servlets i still don't know, but it's not a problem form me anymore . Ofcourse if someone knows the answer , go ahead and write. I would still appriceatte it.
here's the magic tag : <img src="ImageJSP.jsp" border="0" > enjoy : )

Problem with display of JScrollPane

I have made a small GUI.
It has a JFrame and four JPanels are added to the frame.
The placement is done by program and hence layout manager is set to null.
Two of the panels contain JScrollPane.
One scroll pane is associated with a JList.
Another scroll pane is associated with a JTextArea.
I am creating panel components in their respective paintComponent() method.
Now my problem is whenever I run the code, the behaviour of the display of the GUI is erratic. Sometimes it appears perfectly fine other times the JList contents and JTextArea along with their scroll bars don't appear. I have tried running the code on different platforms and different systems. On some systems it works perfectly fine, on some it behaves erratically.
Moreover my experience is that it is giving problem on somewhat lower configuration systems (low RAM and CPU) and running fine on higher configuration systems.
I ran it on my laptop with 512MB RAM and centrino duo processor. (Both on windows and ubuntu it gave the same problem, random display behavior)
I ran it on a desktop with 1GB RAM and higher processor (Both on windows and ubuntu it displayed fine)
Does this problem relate to insufficient painting time or something of this sort? Why is this problem is coming and what's the solution?
Thanks in advance.
Also if anybody has encountered similar problem please do share so that I could at least say this is not a unique one.

The placement is done by program and hence layout manager is set to null.That is (probably) your first problem. Learn to use use LayoutMangers, they save time in the long run.
Sometimes it appears perfectly fine other times the JList contents and JTextArea along with their scroll bars don't appearProbably because preferred sizes are not set correctly. Since you are not using a layout manager that is your responsibility. Easy solution is to use a proper combination of layout managers.
I am creating panel components in their respective paintComponent() method.That is (probably) your second problem. paintComponent() is for doing custom painting, not creating new components dynamically.
I suggest you start by reading the Swing tutorial for example programs.

Submit Statment inside Loop - Problem in display O/P

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