Use buffer in JSP

Question

when I use buffer (use by default) in JSP
<@ page buffer="12kb" %>
Is I must use any method to manage buffer in my script. such as when i use out.println("test");
or it manage buffer automatic and I mustn't use any special method.

Answer 1

I see this code from JSP book
public static String filter(String input)
          StringBuffer temp = new StringBuffer(input.length());
          char c;
          for(int i=0; i<input.length(); i++)
               c=input.charAt(i);
               if(c=='<') temp.append("<");
               else if (c=='>') temp.append(">");
               else if (c=='\'') temp.append("&#039;");
               else if (c=='"') temp.append(""");
               else if (c=='&') temp.append("&");
               else temp.append(c);
          return (temp.toString());
     }So I don't know when I set buffer in page directive. Is I need to use StringBuffer and use append method or it automatic keep output in buffer?
Is StringBuffer and buffer directive is same thing?