AW: Errors Compiling a JSP
There should be more information available in one of the logs. Some background: The JSP is compiled to a servlet. With %! % you define members or methods for the class or instance. With % % you fill the body of a method, all implicit variables (like request) are local to this method. Have a look at the generated code in the work directory to get a better idea what happens with your code. -Ursprüngliche Nachricht- Von: Sharples, Brian [mailto:[EMAIL PROTECTED]] Gesendet: Donnerstag, 15. August 2002 17:21 An: 'Tomcat Users List' Betreff: RE: Errors Compiling a JSP That didn't work. Removing the ! gave me the error: Status 500 The server encountered an internal error that prevented it from fulfilling this request. Thanks Brian -Original Message- From: Capr1ce [mailto:[EMAIL PROTECTED]] Sent: Thursday, August 15, 2002 11:19 AM To: Tomcat Users List Subject: Re: Errors Compiling a JSP Try it like this: % String[] colorValues = request.getParameterValues(colors); % At 11:14 AM 15/08/2002 -0400, you wrote: Hi, I am learning JSP with the SAMS bookTeach Yourself JSP in 24 Hours. One of the sample JSPs keeps getting a compiler error. The code is: Parameters * Country = %= request.getParameter(country) % * Colors: %! String[] colorValues = request.getParameterValues(colors); % * Color 1 = %= colorValues[0]% * Color 2 = %= colorValues[1]% * Color 3 = %= colorValues[2]% The error is a status 500 - Internal Server Error: Undefined variable or class name: request String[] colorValues = request.getParameterValues(colors); If I remove the colorValues variable declaration and just put % request.getParameterValues(colors) %, I get past that line. Of course, the next line then shows colorValues as undefined. I don't understand why this is occurring. I am using Tomcat 4.0.4 and j2sdk 1.4.0_01. Thanks for your help. Brian Sharples -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED] -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED] -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED] -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED]
Re: AW: Errors Compiling a JSP
If that is all the code you have, I assume you have a NullPointerException, which means that one of the variables you are trying to use is null. ie. probably never set. If that code you gave was in a file called 'test.jsp', add parameters onto the end of it when you call it in your browser like this: http://localhost:8080/yourWebapp/test.jsp?country=ukcolors=redcolors=bluecolors=pink with this code: Parameters * Country = %= request.getParameter(country) % * Colors: % String[] colorValues = request.getParameterValues(colors); % * Color 1 = %= colorValues[0]% * Color 2 = %= colorValues[1]% * Color 3 = %= colorValues[2]% and it will work. At 05:34 PM 15/08/2002 +0200, you wrote: There should be more information available in one of the logs. Some background: The JSP is compiled to a servlet. With %! % you define members or methods for the class or instance. With % % you fill the body of a method, all implicit variables (like request) are local to this method. Have a look at the generated code in the work directory to get a better idea what happens with your code. -Ursprüngliche Nachricht- Von: Sharples, Brian [mailto:[EMAIL PROTECTED]] Gesendet: Donnerstag, 15. August 2002 17:21 An: 'Tomcat Users List' Betreff: RE: Errors Compiling a JSP That didn't work. Removing the ! gave me the error: Status 500 The server encountered an internal error that prevented it from fulfilling this request. Thanks Brian -Original Message- From: Capr1ce [mailto:[EMAIL PROTECTED]] Sent: Thursday, August 15, 2002 11:19 AM To: Tomcat Users List Subject: Re: Errors Compiling a JSP Try it like this: % String[] colorValues = request.getParameterValues(colors); % At 11:14 AM 15/08/2002 -0400, you wrote: Hi, I am learning JSP with the SAMS bookTeach Yourself JSP in 24 Hours. One of the sample JSPs keeps getting a compiler error. The code is: Parameters * Country = %= request.getParameter(country) % * Colors: %! String[] colorValues = request.getParameterValues(colors); % * Color 1 = %= colorValues[0]% * Color 2 = %= colorValues[1]% * Color 3 = %= colorValues[2]% The error is a status 500 - Internal Server Error: Undefined variable or class name: request String[] colorValues = request.getParameterValues(colors); If I remove the colorValues variable declaration and just put % request.getParameterValues(colors) %, I get past that line. Of course, the next line then shows colorValues as undefined. I don't understand why this is occurring. I am using Tomcat 4.0.4 and j2sdk 1.4.0_01. Thanks for your help. Brian Sharples -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED] -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED] -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED] -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED] -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED]
RE: AW: Errors Compiling a JSP
The URL I am sending from myFlag.html is: http://localhost:8080/myJSPs/Hour10/myFlag.jsp?country=venezuelacolors=yell owcolors=bluecolors=red -Original Message- From: Capr1ce [mailto:[EMAIL PROTECTED]] Sent: Thursday, August 15, 2002 11:41 AM To: Tomcat Users List Subject: Re: AW: Errors Compiling a JSP If that is all the code you have, I assume you have a NullPointerException, which means that one of the variables you are trying to use is null. ie. probably never set. If that code you gave was in a file called 'test.jsp', add parameters onto the end of it when you call it in your browser like this: http://localhost:8080/yourWebapp/test.jsp?country=ukcolors=redcolors=blue; colors=pink with this code: Parameters * Country = %= request.getParameter(country) % * Colors: % String[] colorValues = request.getParameterValues(colors); % * Color 1 = %= colorValues[0]% * Color 2 = %= colorValues[1]% * Color 3 = %= colorValues[2]% and it will work. At 05:34 PM 15/08/2002 +0200, you wrote: There should be more information available in one of the logs. Some background: The JSP is compiled to a servlet. With %! % you define members or methods for the class or instance. With % % you fill the body of a method, all implicit variables (like request) are local to this method. Have a look at the generated code in the work directory to get a better idea what happens with your code. -Ursprüngliche Nachricht- Von: Sharples, Brian [mailto:[EMAIL PROTECTED]] Gesendet: Donnerstag, 15. August 2002 17:21 An: 'Tomcat Users List' Betreff: RE: Errors Compiling a JSP That didn't work. Removing the ! gave me the error: Status 500 The server encountered an internal error that prevented it from fulfilling this request. Thanks Brian -Original Message- From: Capr1ce [mailto:[EMAIL PROTECTED]] Sent: Thursday, August 15, 2002 11:19 AM To: Tomcat Users List Subject: Re: Errors Compiling a JSP Try it like this: % String[] colorValues = request.getParameterValues(colors); % At 11:14 AM 15/08/2002 -0400, you wrote: Hi, I am learning JSP with the SAMS bookTeach Yourself JSP in 24 Hours. One of the sample JSPs keeps getting a compiler error. The code is: Parameters * Country = %= request.getParameter(country) % * Colors: %! String[] colorValues = request.getParameterValues(colors); % * Color 1 = %= colorValues[0]% * Color 2 = %= colorValues[1]% * Color 3 = %= colorValues[2]% The error is a status 500 - Internal Server Error: Undefined variable or class name: request String[] colorValues = request.getParameterValues(colors); If I remove the colorValues variable declaration and just put % request.getParameterValues(colors) %, I get past that line. Of course, the next line then shows colorValues as undefined. I don't understand why this is occurring. I am using Tomcat 4.0.4 and j2sdk 1.4.0_01. Thanks for your help. Brian Sharples -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED] -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED] -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED] -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED] -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED] -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED]
AW: Errors Compiling a JSP
I don't believe that, there are always error messages in log files. look at them. - Have you looked at the genarated servlet ? - Check colorValues for null before derefencing it. - Check colorValues.length before accessing an index. - This is not the right forum to learn java. -Ursprüngliche Nachricht- Von: Sharples, Brian [mailto:[EMAIL PROTECTED]] Gesendet: Donnerstag, 15. August 2002 17:40 An: 'Tomcat Users List' Betreff: RE: Errors Compiling a JSP If I get rid of the bang I get another internal error with no other information. -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED]
