Snippet: Copy a File

private static void copyFile(File sourceFile, File destFile) throws IOException {
	if (sourceFile == null) {
		throw new IllegalArgumentException();
	}
	if (destFile == null) {
		throw new IllegalArgumentException();
	}

	if (!destFile.exists()) {
		destFile.createNewFile();
	}

	FileChannel in = new FileInputStream(sourceFile).getChannel();
	try {
		FileChannel out = new FileOutputStream(destFile).getChannel();
		try {
			out.transferFrom(in, 0, in.size());
		} finally {
			out.close();
		}
	} finally {
		in.close();
	}
}