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PODealing with memory making Swing animations
 

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    <p>It's my first time writting there but after reading and searching a lot about the subject I'm going to explain, I didn't found anything useful for me (I've checked a post of a guy explaining something similar about an iphone app, but without a final solution). Sorry for my english I'll try to do my best hehe :).</p> <p>Ok, I'm starting: I have java application that shows a set of animations at the same time on a JPanel. These animations are java objects from <strong>Animation</strong> (inheritates from JLabel), a class of my own <em>that stores an array of ImageIcon</em> (representing the frames of animation) and an integer pointer, showing actual frame to paint (index). That class has overriden the method setPaint() in that way:</p> <pre><code>@Override public void paintComponent(Graphics g) { g.drawImage(getImageAt(getCurrentIndex()).getImage(), getX2(), getY2(), getW(), getH(), null); //getImage at retrieves the frame at a "index" position from frame array. if (getCurrentIndex() &lt; getTotal() - 1) { incrementIndex();//increments frame by 1 (next frame) } else { resetIndex();//set index to 0 (frame 0) } } </code></pre> <p>On the other hand, we have <strong>Display</strong>, which inheritates from JPanel and is responsible for repainting the panel (it uses I javax.swing.Timer object and <strong>repaints every 50 ms</strong>).</p> <p>All the images from every Animation object have the same size 768x576 and png format with transparencies (thus I can paint many animations at a time).</p> <p>The problem is that when I load an animation it occupies too much memory because it creates I don't know why either how 200 MB of "int" objects apart of the 2MB that really occupies. When I load more animations the heap's space of the JVM rockets (up to <strong>1.7 GB</strong>... I didn't want to try anymore xD). For example, <strong>6 animations may be 405 frames</strong> (90 in average). I've collected this data with JProfiler, but I can't post the capture so this what I get: Memory usage of my app by JProfiler:</p> <ul> <li><p>java.awtRectangle 3351 KB</p></li> <li><p>sun.java2d.SunGraphics2D 16.510 KB (I think this is the size of all the animations and sounds logical).</p></li> <li><p>java.lang.String 669KB</p></li> <li><p>int[] 1337 MB ...</p></li> </ul> <hr> <p>In display, the loading images process is in this way:</p> <pre><code>add(new Animation (loadImageSet(Constants.DIR_CINTA_EJE,"all"), Constants.A_CINTA_EJE, 75,-200,768,576));//1 </code></pre> <p>Where DIR_CINTA_EJE is the directory where all the frames of that animation are and the value "all" means that I want to load all the frames.</p> <p>There is a way to avoid that memory used grows linearly with the number of animations? Why those ​​"int" values occupies so much? Are they the pixels of each image?</p> <p>And yes, I have Increased my heap space up to 2GB and it's working, but at a high cost. Thank you very much for all the help you can provide. I love this forum, really.</p> <p>Regards.</p>
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    1. COthe int[] which is the real concern, is the Raster data (the image bitmap data). The other memory you list is insignificant.
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    2. COSo the only solution is to recreate the animations to a lower resolution? For now, I'll try that, thanksss!
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    3. COCan you post `getImage()` code?
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