i keep getting that error on line 139. i need help please -
* RegLoginServletHW3.java
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*
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* Created on October 17, 2007, 10:29 PM
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*/
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package ITIS5166;
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import java.io.*;
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import java.net.*;
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import javax.servlet.*;
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import javax.servlet.http.*;
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import java.util.*;
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import java.util.regex.*;
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/**
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*
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* @author Administrator
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* @version
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*/
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public class RegLoginServletHW3 extends HttpServlet {
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private Hashtable users;//Info = new Hashtable();
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protected void doGet(HttpServletRequest request,
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HttpServletResponse response)
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throws ServletException, IOException {
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String username = "";
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String password = "";
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String passwordConfirm = "";
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String usernameError = "";
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String passwordError = "";
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String passwordConfError = "";
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if (users == null) {
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users = new Hashtable();
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}
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HttpSession session = request.getSession();
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String sessionUser = (String) session.getAttribute("user");
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if (sessionUser != null){
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session.invalidate();
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} else {
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username = (String) request.getParameter("user");
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password = (String) request.getParameter("password");
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passwordConfirm = (String) request.getParameter("confpass");
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if (username == null && password == null && passwordConfirm == null) {
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//the first time the page has been display
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}
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else if ( username == null || username.length() == 0) {
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usernameError = "<tr class=\"content error\"><td colspan=\"2\"> Error: Please Enter a username</td></tr>\n";
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} else if (password == null || password.length() ==0) {
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passwordError = "<tr class><td colspan=2> Error: Please enter a password</td></tr>\n";
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} else {
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username = HTMLFilter(username);
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if (users.containsKey(username)) {
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String storedPassword = (String) users.get(username);
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if (storedPassword.equals(password)) {
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session.setAttribute("user", username);
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response.sendRedirect("CatSerlvetHW3");
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} else {
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if (passwordConfirm !=null && passwordConfirm.length() > 0) {
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usernameError = "<tr><td colspan=\"2\">Error: username already in use</td></tr>\n";
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} else {
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passwordError = "<tr><td colspan=\"2\">Error: Incorrect password</td></tr>\n";
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}
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}
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} else {
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if (passwordConfirm == null || ! password.equals(passwordConfirm)) {
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passwordConfError = "<tr><td colspan=\"2\">Error: Passwords do not match</td></tr>\n";
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} else {
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session.setAttribute("user", username);
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users.put(username,password);
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response.sendRedirect("CatServletHW3");
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}
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}
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}
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}
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if (username == null) {username = "";}
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response.setContentType("text/html; charset=UTF-8");
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PrintWriter out = response.getWriter();
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String title = "Login/Register";
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String docType =
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"<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.0 " +
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"Transitional//EN\">\n";
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out.println(docType +
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"<HTML>\n" +
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"<HEAD><TITLE>" + title + "</TITLE></HEAD>\n" +
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"<BODY BGCOLOR=\"#FDF5E6\">\n" +
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"<form action= \"\" method=\"post\">\n" +
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"<table border=\"1\">\n" +
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"<tr><td colspan=\"2\"> Login/Register\n" +
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"Account Information</td></tr>\n" +
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usernameError +
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"<tr><td> Request Username:</td>\n" +
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"<td><input type=\"text\"\n" +
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"name=\"user\" value=\"" + username + "\"/> </td></tr>\n"+
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passwordError+
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"<tr><td> Password:</td>\n" +
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"<td><input type =\"password\"\n"+
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"name=\"pass\" /></td></tr> \n" +
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"<tr><td colspan\"2\"> For New Account ,\n" +
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"Confirm Password</td><tr>\n" +
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"passwordConfError +" +
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"<tr><td>Password:</td>\n" +
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"name=\"confpass\" /> </td></tr>\n" +
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"<tr><td=\"2\">\n" +
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"<input type=\"submit\"\n" +
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"value=\"Submit\" />\n" +
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"<input type=\"reset\"\n" +
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"value=\"Reset\" /></td></tr>\n" +
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"</table>\n" +
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"</form> \n " +
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"</body> \n" +
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"</html> \n");
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}
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protected void doPost(HttpServletRequest request,
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HttpServletResponse response)
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throws ServletException, IOException {
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doGet(request, response);
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}
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public static String HTMLFilter(String input){
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String regex[] = {"&","<",">","\""};
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String replace[] = {"&", "<", ">", """};
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Matcher m;
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String newString = "";
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String s = input;
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for (int i = 0; 1 < 4; i++) {
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m = Pattern.compile(regex[i]).matcher(s);
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newString = (m.find() ? m.replaceAll(replace[i]) : s);
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s = newString;
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}
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return newString;
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//} else {
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// return input;
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//}
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}
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}
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2  6694 
Hi.
Because you have commented these line of code.
Just remove the // and see how it works now...
i keep getting that error on line 139. i need help please
You really should fix your indentation; it is a mess now. I removed everything
except for the offending method: -
public static String HTMLFilter(String input){
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String regex[] = {"&","<",">","\""};
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String replace[] = {"&", "<", ">", """};
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Matcher m;
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String newString = "";
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String s = input;
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for (int i = 0; 1 < 4; i++) {
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m = Pattern.compile(regex[i]).matcher(s);
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newString = (m.find() ? m.replaceAll(replace[i]) : s);
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s = newString;
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}
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return newString;
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//} else { // <--- this was line 139
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// return input;
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//}
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}
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Even if you uncomment those lines the compiler never would've complained
about "unreachable code" because it would be a simple syntax error.
Please clean up your code and try to ask your question again.
kind regards,
Jos
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