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POJavax ImageIO IIOException for apparently no reason
 

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  1. POJavax ImageIO IIOException for apparently no reason
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    <p>Hey all, I have a Java problem. For my senior research class, I'm pretty much finished but I just have to analyze some data in images I generated. I don't want to tag this as homework because it's not part of any required assignment...it's something I came up with on my own to collect results. I wrote a program that compares two images pixel by pixel. It does this for all .bmp files in two directories. Now, my program reads the filenames into a String array and I checked the values of all the filenames, so I know the directories and filenames are being accessed fine initially. Here's the problematic code:</p> <pre><code> public static void main(String[]args) throws IOException { File actualDir = new File("C:\\Users\\Rowe\\Desktop\\testExpect"); String actualFiles[] = actualDir.list(); File expectedDir = new File("C:\\Users\\Rowe\\Desktop\\testExpect2"); String expectedFiles[] = expectedDir.list(); int[][] stats = new int[actualFiles.length][6]; // Holds all info //Columns, Rows, Total, redMatches, shouldaBeenRed, badRed for(int i = 0; i &lt; actualFiles.length; i++) { BufferedImage actualImage = null; System.out.println(actualFiles[i]); //THIS PRINTS PROPERLY System.out.println(System.getProperty("user.dir")); //FOR TESTING actualImage = ImageIO.read(new File("C:\\Users\\Rowe\\Desktop\\testExpect\\"+actualFiles[i])); //ERROR HERE BufferedImage expectedImage = null; expectedImage = ImageIO.read(new File("C:\\Users\\Rowe\\Desktop\\testExpect2\\"+expectedFiles[i])); //THIS IMAGE WORKS </code></pre> <p><code>...rest of code</code></p> <p>Now, when I change the directories to be the same, the program runs, and detects all pixels to be 100% alike (as it should, so I know the program does what I want it to do). Here's the error:</p> <p><code>Exception in thread "main" javax.imageio.IIOException: Can't read input file! at javax.imageio.ImageIO.read(Unknown Source) at PixelCompare.main(PixelCompare.java:22)</code></p> <p>I've tried different directories to no avail. Could it be something about the .bmp files? What could make one set of BMPs read just fine and another set not work? I can open all the required files in other programs, so they're not corrupted. All properties appear to be the same. One directory was hand-made in Gimp (these read fine), and another was generated by a Java-based program. These can be read in Gimp, Paint, Photoshop, etc, but they won't read in my code.</p> <p>Any help is greatly appreciated, thanks!</p> <p>Edit: Forgot to use reverted code...I screwed with it then posted some bad version. Revised to show original problem with what is otherwise functional code. To further describe the problem: if you changed both directories to look in testExpect2 folder for the file list in expectedFiles[], it would run successfully. Also, the <code>System.out.println(actualFiles[i]</code> prints the correct filename before the error occurs, so I know the correct file is being read into the String array. </p>
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    1. COI'm confused - I don't think that code would work in any case because it doesn't seem to be putting a backslash between the directory name and the filename, as it should.
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      1. POJavax ImageIO IIOException for apparently no reason
      1. USRobin Green
    2. COOther note: you're using `expectedFiles[i]` twice, and `actualFiles[i]` only for debug output. This is fishy.
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    3. COare you sure expectedFiles[] contains relative paths?
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      1. USandijcr
 

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