doubt on getParameterNames()

[Abhijit Das]

hello,
I am getting different types of exceptions while calling.

   Enumeration en = request.getParameterNames() ;
  while(en.hasMoreElements()){
      System.out.println("Name ::: "+ en.nextElement()+ "    Value :::  "+ request.getParameter((String) en.nextElement()));
  }  

It displays some set of name and value pair. After Exception is thrown.
.......................................
.........................................
16:22:32,750 INFO [STDOUT] Name ::: opcode Value ::: 01/04/2004
16:22:32,750 INFO [STDOUT] Name ::: hidbusinesspartnercode Value :::
16:22:32,750 INFO [STDOUT] Name ::: accountRight Value :::
16:22:32,750 INFO [STDOUT] Name ::: periodFlag Value :::
16:22:32,750 INFO [STDOUT] Name ::: hidEndDateFrom Value :::
16:22:32,750 ERROR [Engine] ApplicationDispatcher[] Servlet.service() for servlet jsp threw exception
java.util.NoSuchElementException
at java.util.HashMap$HashIterator.nextEntry(HashMap.java:790)
................................
...........................


But ,in API , the methods do not throw any exeption. if it is not found , simply returns null.

[Herman Schelti]

hi,

nextElement() declares to throw NoSuchElementException
Looks like you call it twice after each hasMoreElements()

Herman

[Jilesh Lakhani]

 
 Enumeration en = request.getParameterNames() ;
  while(en.hasMoreElements()){
String element = (String)en.nextElement();
      System.out.println("Name ::: "+ element+ "    Value :::  "+ request.getParameter(element));
  }  

You are doing nextElement() twice thats the reason try this out it would surely help you!!

[Abhijit Das]

yes, I wrote it twice.
Thanks both of you,
now it is working