Java copy files distorting file

So I am trying to copy a file to a new location this way:

FileReader in = new开发者_运维问答 FileReader(strTempPath);
FileWriter out = new FileWriter(destTempPath);

int c;
while ((c = in.read()) != -1){
    out.write(c);
}

in.close();
out.close();

Which works fine 99% of the time. Sometimes, if the image is rather small, <= 60x80px, the copied image comes out all distorted. Does anyone know what might be going on here? Is it the fault of the copy function here or should I be looking elsewhere?

Thanks.

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Don't use a Readers / Writers to read binary data. Use a InputStreams / OutputStreams or Channels from the nio package (see below).

Example from exampledepot.com:

try {
    // Create channel on the source
    FileChannel srcChannel = new FileInputStream("srcFilename").getChannel();

    // Create channel on the destination
    FileChannel dstChannel = new FileOutputStream("dstFilename").getChannel();

    // Copy file contents from source to destination
    dstChannel.transferFrom(srcChannel, 0, srcChannel.size());

    // Close the channels
    srcChannel.close();
    dstChannel.close();
} catch (IOException e) {
}

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Convenience class for reading character files. http://download.oracle.com/javase/6/docs/api/java/io/FileReader.html