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POWaiting function has logic error
 

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  1. POWaiting function has logic error
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    <p>I have created an program that automates certain functions at my place of business but I'm trying to dummy proof it so it cannot go wrong and I have encountered an error that should not be occurring. </p> <p>Basically what my method is doing is waiting until the spreadsheet has stopped being populated and auto formatted so I can do some other stuff with it. All this method has to do is take a screen shot, wait, take another screen shot and if they are the same then continue, if not wait some more. </p> <p>here are the methods. </p> <pre><code>private boolean WaitTillDone() { BufferedImage image1; BufferedImage image2; image1 = siri.createScreenCapture(new Rectangle(0,0,width,height-80)); wait(4000); image2 = siri.createScreenCapture(new Rectangle(0,0,width,height-80)); boolean same = bufferedImagesEqual(image1,image2); return same; } public boolean bufferedImagesEqual(BufferedImage img1, BufferedImage img2) { if (img1.getWidth() == img2.getWidth() &amp;&amp; img1.getHeight() == img2.getHeight() ) { for (int x = 0; x &lt; img1.getWidth(); x++) { for (int y = 0; y &lt; img1.getHeight(); y++) { if (img1.getRGB(x, y) != img2.getRGB(x, y) ) return false; } } } else { return false; } return true; } </code></pre> <p>Here is the loop that this is being called in.</p> <pre><code>do{ running = WaitTillDone(); wait(800); }while(running); </code></pre> <p>The program loops ok but sometimes when the images are not the same and it has to wait it will enter an "infinite" loop. I say "infinite" because without any user input it will not continue. However if I press any arrow button or enter just to move the selected box in excel so that the images will be different it will continue along with no problems. So i was wondering if there was anything that I was doing wrong (besides calling a wait (a Thread.sleep) in a loop) that would cause my program to have this logic error.</p> <p>EDIT: This problem is not occurring every time, only about 1/4th of the time. This problem is resolved, the mistake was the do-while condidtion. It was supposed to be </p> <pre><code>do{ running = WaitTillDone(); wait(800); }while(!running); </code></pre> <p>Thank you all for your help.</p>
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    1. USJoel Newman
    1. USJoel Newman
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    1. COwhat is the reason behind adding **wait(4000)** in function **WaitTillDone()** between **image1** and **image2** initialization?
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      1. USAbhimanyu Singh
    2. COto allow for the spreadsheet to continue being populated and formatted. If I did not have the wait there then it would take the images way too fast and give a false positive. Think of it this way, you are taking snapshots at a "regular" interval just to see when all the movement stops.
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      1. USJoel Newman
    3. COI think you need to debug the differences with the images. I doubt the error is in the logic above and more likely there is something going on with the images since only one pixel has to be different. You might consider a percentage threshold like 0.1% or 100 px. Is it possible that when Excel is in some waiting state it is editing the color of the cursor or something like that.
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      1. USJohn B
 

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