java redirect 301

Question

I need to do a permanent directing via Servlet in java, with the code below:

Here it directs with the status 301

response.setStatus(HttpServletResponse.SC_MOVED_PERMANENTLY);
response.setHeader("Location", "https://google.com");

Here it directs with the status 200

response.setStatus(HttpServletResponse.SC_MOVED_PERMANENTLY);
response.setHeader("Location", "https://www.google.com");

Does anyone know why you don’t behave the same way? I’m having problems directing to other domains, where they always get status 200.