eclipse无法识别“ PrintWriter”

Question

I have Eclipse(Kepler) IDE and when I write the below code.

PrintWriter pw=response.getWriter();

It displays an error message saying that PrintWriter cannot be resolved to type. The import statements that I have used are as follows,

import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.*;

Do I have to import some additional statements to get my PrintWriter to work? If yes then which are they?

Thanks in advance :)

Answer 1

You need to import java.io.PrintWriter .

Eclipse provides a useful shortcut to Organize Imports , Ctrl + Shift + O . By default this imports each class explicitly.

Answer 2

Er, yes, you need to import java.io.PrintWriter . Or java.io.* .

Answer 3

All you need is the following

   import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;