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  1. PO
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    <p>There is no problem with MyComputer because it appears in the list with or without the null condition. Please check how <code>FileFilter</code> works <a href="http://docs.oracle.com/javase/6/docs/api/javax/swing/filechooser/FileFilter.html" rel="nofollow" title="FileFilter documentation">here</a> .</p> <p>As stated in the documentation: </p> <blockquote> <p>"A <code>FileFilter</code> can be set on a <code>JFileChooser</code> to keep unwanted files from appearing in the directory listing".</p> </blockquote> <p>So if <code>accept()</code> method returns <code>true</code>, means that the passed in <code>File</code> will appear in the list, false otherwise.</p> <p>The application hangs because what MyComputer may contain. Put a log like below: </p> <pre><code>public boolean accept(File f) { System.out.println("File is : " + f); if(f.isDirectory()) return true;..... </code></pre> <p>Rerun the application without the null condition, in order to reproduce the issue, and update your question with the output you see. The answer will be there.</p> <p><strong>Edit:</strong> I simulated the behaviour you have and I get below output, please update your question with similar output, at least the last 10 lines:</p> <pre><code>File is : Computer File is : Network File is : Libraries File is : Homegroup File is : C:\ File is : E:\ File is : F:\ Exception in thread "Basic L&amp;F File Loading Thread" java.lang.NullPointerException: at Main$1.accept(Main.java:17) at javax.swing.JFileChooser.accept(JFileChooser.java:1617) at javax.swing.plaf.basic.BasicDirectoryModel$LoadFilesThread.run0(BasicDirectoryModel.java:252) at javax.swing.plaf.basic.BasicDirectoryModel$LoadFilesThread.run(BasicDirectoryModel.java:228) </code></pre> <p>I hope this helps.</p> <p>P.S.: an easier way to do the filtering is to use <code>FileNameExtensionFilter</code> </p>
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    1. POJFileChooser's anomaly with MyComputer in Windows
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    1. USGyuri Majercsik
    1. USGyuri Majercsik
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    1. COI have edited the question, plz have a look! I will definitely try `FileNameExtensionFilter` after this one is resolved.
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      1. USSurender Thakran
    2. COOne more important detail: which JDK are you using ?
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      1. USGyuri Majercsik
    3. COI edit my answer. Please update the question accordingly. I'm just thinking if you have any device(s) connected to your PC and are present in My Computer if you open it in Explorer, other than your HDD partitions.
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      1. USGyuri Majercsik
 

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