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copied!<p>Isn't the C API creator willing to take step back and reimplement with <strong>UTF-8</strong>? :) Your work would essentialy disappear, needing only <code>GetStringUTFChars</code>/<code>NewStringUTF</code>. </p> <p><code>jchar</code> is typedefed to <code>unsigned short</code> and is equivalent to JVM <code>char</code> which is <strong>UTF-16</strong>. So on Windows where <code>wchar_t</code> is 2 bytes <strong>UTF-16</strong> too, you can do away with the code you presented. Just copy the raw bytes around, allocate accordingly. Don't forget to free after you're finished with the C API call. Complement with <code>NewString</code> for conversion back to jstring.</p> <p>The only other <code>wchar_t</code> size i am aware of is 4 bytes (most prominently Linux) being <strong>UTF-32</strong>. And here comes the problem: <em>UTF-32 is not just UTF-16 somehow padded to 4 bytes.</em> Allocating double the amount of memory is just a beginning. There is a substantial conversion to do, <a href="http://gears.googlecode.com/svn/trunk/third_party/convert_utf/ConvertUTF.c" rel="nofollow">like this one which seems to be sufficiently free</a>. </p> <p>But if you are not after performance that much and are willing to give up the plain memory copying on Windows, i suggest going <code>jstring</code> to UTF-8 (which is what JNI provides natively with documented functionality) and then UTF-8 to UTF-16 or UTF-32 depending on <code>sizeof(wchar_t)</code>. There won't be any assumptions about what byte order and UTF encoding each platform gives. You seem to care about it, i see that you are checking <code>sizeof(jchar)</code> which is 2 for the most of the visible universe :)</p>

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