java code for Servlet: URL redirect

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class UrlRedirect extends HttpServlet {

public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, java.io.IOException {
String contextPath= "http://www.java2s.com";
response.sendRedirect(response.encodeRedirectURL(contextPath + "/maps"));
}
}