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Editorial Team
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Asked: 2026-05-20T22:37:22+00:00

I am writing remote desktop application. So I am transferring Images from one machine

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I am writing remote desktop application. So I am transferring Images from one machine to another machine as byte array through socket. After receiving byte array I convert it into image and draw on a panel. Code looks approximately like below

imageBytes = //read from socket.
InputStream in = new ByteArrayInputStream(imageBytes);
BufferedImage bufferedImage = ImageIO.read(in);
Image image = Toolkit.getDefaultToolkit().createImage(bufferedImage.getSource());
Image scaledImage = image.getScaledInstance(rmdPanel.getWidth(),rmdPanel.getHeight() ,Image.SCALE_FAST);
Graphics graphics = rmdPanel.getGraphics();
graphics.drawImage(scaledImage, 0, 0, rmdPanel.getWidth(),rmdPanel.getHeight(),rmdPanel);

I also store imagebytes till next image comes(for comparison). Now I am getting java out of memory exception in this code(while receiving byte array). I have heap size of 128 mb-512 mb. Image bytes sent are maximum 3mb.

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1 Answer

  1. Editorial Team

    (you don’t show the communication code, so i’m just guessing) if you are using ObjectInputStream/ObjectOutputStream over the socket streams, you need to be aware that they cache objects sent over the wire (to avoid resending the same data). sometimes, this is a nice feature, but it can cause problems if objects are held too long. you need to periodically call reset() on the ObjectOutputStream to clear this cache (in your case, possibly after every image send).

    of course, the surest way to solve this problem is to attach a memory profiler and see what’s using all the memory (or analyze a heap dump).

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