ServletOutputStream is used to generate output for the client (who calls the Servlet). In the example below, response is instance of HttpServletResponse.
ServletOutputStream out = response.getOutputStream();
out.println("<html>");
out.println("<head>");
out.println("<title>Hello World</title>");
out.println("</head>");
out.println("<body>");
out.println("<b>Hello World</b>");
out.println("</body>");
out.println("</html>");
out.close();
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