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Thread: ServletExample code problem - beginner

  1. #1
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    Default 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


  2. #2
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    Default Re: ServletExample code problem - beginner

    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>");

  3. #3
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    Default Re: ServletExample code problem - beginner

    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

  4. #4
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    Default Re: ServletExample code problem - beginner

    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

  5. #5
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    Default Re: ServletExample code problem - beginner

    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

  6. #6
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    Default Re: ServletExample code problem - beginner

    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.

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