Thread: ServletExample code problem - beginner

Hello Friends

I tried compiling this code

Servlet Example, Java Servlet Example, Servlet source code (WelcomeServlet.java file)

in my linux system and I am getting the following error and I can't see the problem for I copied and paste. I am a newbie and learning servlet



james@ubuntu:/usr/local/tomcat/MyProjects/Servlet-Example$ javac WelcomeServlet.java
WelcomeServlet.java:41: ')' expected
out.println("<a href="/Servlet-Example/form.html">"+"Click here to go back to input page "+"</a>");
^
WelcomeServlet.java:41: not a statement
out.println("<a href="/Servlet-Example/form.html">"+"Click here to go back to input page "+"</a>");
^
WelcomeServlet.java:41: ';' expected
out.println("<a href="/Servlet-Example/form.html">"+"Click here to go back to input page "+"</a>");
^
3 errors


I suspect I am using Linux instead of windows.

Thanks
Sawubona

Hi Sawubona,
You need to escape the double quotes (") in your code. Replace the following line

out.println("<a href="/servletexample/pages/form.html">"+"Click here to go back to input page
"+"</a>");

with

out.println("<a href=\"/servletexample/pages/form.html\">"+"Click here to go back to input page "+"</a>");

Thanks java_13 . I might have made progress and now it is complaining about this


WelcomeServlet.java:6: package javax.servlet does not exist
import javax.servlet.ServletConfig;
^
WelcomeServlet.java:7: package javax.servlet does not exist
import javax.servlet.ServletException;
^
WelcomeServlet.java:8: package javax.servlet.http does not exist
import javax.servlet.http.HttpServlet;
^
WelcomeServlet.java:9: package javax.servlet.http does not exist
import javax.servlet.http.HttpServletRequest;
^
WelcomeServlet.java:10: package javax.servlet.http does not exist
import javax.servlet.http.HttpServletResponse;
^
WelcomeServlet.java:12: cannot find symbol
symbol: class HttpServlet
public class WelcomeServlet extends HttpServlet {
^
WelcomeServlet.java:15: cannot find symbol
symbol : class ServletConfig
location: class jsptube.tutorials.servletexample.WelcomeServlet
public void init(ServletConfig config) throws ServletException {
^
WelcomeServlet.java:15: cannot find symbol
symbol : class ServletException
location: class jsptube.tutorials.servletexample.WelcomeServlet
public void init(ServletConfig config) throws ServletException {
^
WelcomeServlet.java:20: cannot find symbol
symbol : class HttpServletRequest
location: class jsptube.tutorials.servletexample.WelcomeServlet
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
^
WelcomeServlet.java:20: cannot find symbol
symbol : class HttpServletResponse
location: class jsptube.tutorials.servletexample.WelcomeServlet
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
^
WelcomeServlet.java:20: cannot find symbol
symbol : class ServletException
location: class jsptube.tutorials.servletexample.WelcomeServlet
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
^
WelcomeServlet.java:16: cannot find symbol
symbol : variable super
location: class jsptube.tutorials.servletexample.WelcomeServlet
super.init(config);
^
WelcomeServlet.java:14: method does not override or implement a method from a supertype
@Override
^
13 errors


I suspect this:

package jsptube.tutorials.servletexample;

was I supposed to import this package?

Thanks

You code is correct. Do you have "servlet-api.jar" in your java class-path? This is the jar file that have all the packages and classes that compiler is complaining about.
-> If you are using an IDE, like eclipse, you can configure build path and add this jar.
-> If you are compiling it from command prompt, you can use -classpath option and put jars under class-path. Here is the command :

javac -classpath "C:\Program Files\Apache Software Foundation\Tomcat 6.0\lib\servlet-api.jar" WelcomeServlet.java

Hi Java_13

I tried compiling using the classpath and I am still getting the same errors. I think it can t find the packages . I used the command prompt in Linux (Ubuntu) and verified the servlet-api was in the lib directory - javac -classpath "/usr/local/Tomcat/lib/servlet-api.jar" WelcomeServlet.java

See, if you can provide me your sample code. I will try compiling it and see if anything is wrong there. Because, i have used that command several times to compile Servlet code. don't know whats wrong with it.