Concurring Java Problem...PLease Please Help

[doflynn]

When I run my java application this error keeps coming up when trying to log in. Yer help would be much appreciated

HTTP Status 500 -
--------------------------------------------------------------------------------

type Exception report

message

description The server encountered an internal error () that prevented it from fulfilling this request.

exception

org.apache.jasper.JasperException: Exception in JSP: /HeadNPass.jsp:19

16:
17:
18: NurseDao da = new NurseDao();
19: Nurse n = da.getNurse(userName);
20:
21: if(n != null)
22: {

Stacktrace:
org.apache.jasper.servlet.JspServletWrapper.handle JspException(JspServletWrapper.java:504)
org.apache.jasper.servlet.JspServletWrapper.servic e(JspServletWrapper.java:393)
org.apache.jasper.servlet.JspServlet.serviceJspFil e(JspServlet.java:314)
org.apache.jasper.servlet.JspServlet.service(JspSe rvlet.java:264)
javax.servlet.http.HttpServlet.service(HttpServlet .java:802)
org.netbeans.modules.web.monitor.server.MonitorFil ter.doFilter(MonitorFilter.java:368)


root cause

java.lang.NullPointerException
hospital.NurseDao.getNurse(NurseDao.java:324)
org.apache.jsp.HeadNPass_jsp._jspService(HeadNPass _jsp.java:63)
org.apache.jasper.runtime.HttpJspBase.service(Http JspBase.java:97)
javax.servlet.http.HttpServlet.service(HttpServlet .java:802)
org.apache.jasper.servlet.JspServletWrapper.servic e(JspServletWrapper.java:332)
org.apache.jasper.servlet.JspServlet.serviceJspFil e(JspServlet.java:314)
org.apache.jasper.servlet.JspServlet.service(JspSe rvlet.java:264)
javax.servlet.http.HttpServlet.service(HttpServlet .java:802)
org.netbeans.modules.web.monitor.server.MonitorFil ter.doFilter(MonitorFilter.java:368)




--------------------------------------------------------------------------------

The code is as follows:


String userName = request.getParameter("username");
String password = request.getParameter("password");


if ((userName != null) && (password != null)){


NurseDao da = new NurseDao();
Nurse n = da.getNurse(userName);

if(n != null)
{
int pw = Integer.parseInt(password);
if(n.getStaffId() == pw)
{
request.getSession(true).setAttribute("HEADNURSE", n);
response.sendRedirect("HeadNurse.jsp");
}
else
{
response.sendRedirect("error.jsp");
}
}
else
{
response.sendRedirect("error.jsp");
}

[jelly]

The failure is saying that you have a Null Pointer Exception in your NurseDAO code at line 324 :-

Code:

...
hospital.NurseDao.getNurse(NurseDao.java:324)
...

Have a look at the code at line 324 in the NurseDAO class ( or possibly one or two lines either way. These will be in the getNurse method and it is where you are getting the exception. If you get problems post the code from that method and we'll try to help