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    <p>Create shared between two threads <code>LinkedBlockingQueue</code>.</p> <p>From thread <code>CaptureScreenshots</code> put into this queue newly created <code>File</code> objects.</p> <p>From thread <code>RenameScreenShots</code> sequentially read from this queue prepared <code>File</code> objects and process them.</p> <p><strong>UPD:</strong> If you are afraid that billions of image file will eat a lot of memory by their <code>File</code> descriptor, you can apply such algorithm enhancing:</p> <ol> <li><p>Create subfolders in folder, which contains your image files and put image files into this subfolders.</p></li> <li><p>Name those subfolders and integer names: <code>1</code>, <code>2</code>, <code>3</code>, ... , <code>89</code>.</p></li> <li><p>Artificially limit number of files in each subfolder. When the number of files reaches limit just increase name-number of subfoler, create new and go on.</p></li> <li><p>Instead of putting <code>File</code> descriptor for each image file to <code>LinkedBlockingQueue</code>, put there <code>Integer</code> objects, where each will correspond to filled subfolder with same name.</p></li> <li><p>Inside <code>RenameScreenShots</code> take new element from <code>LinkedBlockingQueue</code>, consider this element as subfolder name and process all quietly files within this subfolder.</p></li> </ol> <p><strong>UPD-2</strong> The scheme introduced in my <code>UPD-1</code> could be more easily implemented using shared <code>synchornized</code> getter of some integer value, which will correspond to last number of processed subfolder.</p>
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    1. POHow to synchronize access to a folder using java?
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    1. POHow to synchronize access to a folder using java?
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    1. COIf LinkedBlockingQueue takes up space in memory then this wouldn't be a good solution as all the files would take up space in the main memory and if there are billions of images then this surely doesn't make sense
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    2. CO`File` object is just simple descriptor of some file (in a nutshell, consider it like wrapper, which contains just it name and path on the disk). It will not eat a lot of memory.
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    3. COWell the linked blocking queue will surely store the file descriptors as references so what good have I done if I am using a billion references there still will be a memory issue moreover the workaround you told of creating subfolders would complicate my job rather than easing it out.
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