Convert Contents Of A ByteArrayInputStream To String

Question

I read this post but I am not following. I have seen this but have not seen a proper example of converting a ByteArrayInputStream to String using

Answer 1

Why nobody mentioned org.apache.commons.io.IOUtils?

import java.nio.charset.StandardCharsets;
import org.apache.commons.io.IOUtils;

String result = IOUtils.toString(in, StandardCharsets.UTF_8);

Just one line of code.