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copied!<p>I am trying to track down the problem. Here is what I already have:</p> <p>There is <code>Exists.java</code>:</p> <pre><code>import java.io.*; public class Exists { public static void main(String[] args) { new File("aaa").exists(); new File("aaa\u00E4").exists(); new File("aaa\u00C3\u00A4").exists(); } } </code></pre> <p>And there is <code>java -version</code>:</p> <pre><code>java version "1.6.0_20" Java(TM) SE Runtime Environment (build 1.6.0_20-b02) Java HotSpot(TM) 64-Bit Server VM (build 16.3-b01, mixed mode) </code></pre> <p>Now to the interesting part:</p> <pre><code>$ strace -f -o strace.out java Exists && grep 'stat("aaa' strace.out 31942 stat("aaa", 0x41464950) = -1 ENOENT (No such file or directory) 31942 stat("aaa\303\244", 0x41464950) = -1 ENOENT (No such file or directory) 31942 stat("aaa\303\203\302\244", 0x41464950) = -1 ENOENT (No such file or directory) </code></pre> <p>The nice thing is that <code>strace</code> works on byte-level, not character-level like Java. So everything is ok in this case. I have the environment variable <code>LANG</code> set to <code>en_US.UTF-8</code>, all of the <code>LC_*</code> variables are unset.</p> <p>Now tracking down the problem to a minimal working example:</p> <pre><code>$ strace -f -o strace.out env - LC_ALL=en_US.UTF-8 /home/roland/bin/java Exists && grep 'stat("aaa' strace.out 31968 stat("aaa", 0x41a75950) = -1 ENOENT (No such file or directory) 31968 stat("aaa\303\244", 0x41a75950) = -1 ENOENT (No such file or directory) 31968 stat("aaa\303\203\302\244", 0x41a75950) = -1 ENOENT (No such file or directory) </code></pre> <p>That still works. So let's try another encoding:</p> <pre><code>$ strace -f -o strace.out env - LANG=en_US.ISO-8859-1 /home/roland/bin/java Exists && grep 'stat("aaa' strace.out 32070 stat("aaa", 0x407a3950) = -1 ENOENT (No such file or directory) 32070 stat("aaa?", 0x407a3950) = -1 ENOENT (No such file or directory) 32070 stat("aaa??", 0x407a3950) = -1 ENOENT (No such file or directory) </code></pre> <p>So this doesn't work. One possible reason might be that I selected a locale that is not in the list printed by <code>locale -a</code>. But this shouldn't be the reason for Java to convert the letters to question marks.</p> <p>As soon as LANG points to a non-existing locale, the setting of the <code>sun.jnu.encoding</code> property doesn't have any effect anymore. So I'm out of ideas now.</p>

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