pankaj kapoor

I am a beginner in Java .
I am trying to run a simple java program but I am getting
"Exception in thread "main" java.lang.NoClassDefFoundError:" error when I run the program .
I suppose I am not able to set the (classpath/environment variables)
in my system.
could anyone help me for this. Thanks in advance

Pankaj

In what situation do we use reflection? is it a good practice to use reflection or should it be avoided? what are the advantages/disadvantages to use reflection?

If you willl manipulate String 10 times ten new Strings will be created, while if you do the same with StringBuffer, it will remain 1 String only

could anyone provide the links for K&B . I am preparing for SCJP

In many postings I have seen 'Please refer to K&B' . I wanted to know what is this K&B

Thaanks in advance
Pankaj

could anyone tell me the difference between

this.getClass().getClassLoader().getResourceAsStream(filename );
and
this.getClass().getResourceAsStream(filename);


Thanks in advance
Pankaj

here are a few links by whch you can dynamically add/modify HTML table


http://developer.mozilla.org/en/docs/Traversing_an_HTML_table_with_JavaScript_and_DOM_Interfaces
http://www.siteexperts.com/demo/page4.asp
http://www.developerfusion.co.uk/forums/110438/ShowThread.aspx#110438
http://www.sitepoint.com/forums/showthread.php?p=2221558#post2221558

hope this serves your purpose

To store value using javascript you have to use

var v = document.form1.view.value;
not
String val = document.form1.view.value;

I tried this code
<%@ page import="java.util.*" %><%@ page isELIgnored="false" %><%@ taglib uri="http://java.sun.com/jsp/jstl/functions" prefix="fn" %><%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %> <%List ll = new ArrayList();ll.add("India");ll.add("Pakistan"); request.setAttribute( "ll" , ll ) ;%><c ut value="${fn:length(ll)}"

but it does not work. I suppose there is some problem with the JSP version I am using.(JSP 1.2) but even 1.2 version supports this.

I am trying to print the size of list with the following code in jsp
<%
List ll = new ArrayList();
ll.add("India");
ll.add("Pakistan");
%>
<c ut value="${fn:length(ll)}" />
but I am not able to do so.

The tablib I have included in jsp is
<%@ taglib uri='http://java.sun.com/jstl/functions' prefix='fn' %>
but error 'broken link' comes

I have included standard.jar in classpath

could anyone suggest to me what is the solution to this problem.

Thanks in advance

String s = new String("abc");
String b = new String("abc");
if(s==b )
System.out.println("equal");

String s1 = "abc";
String b1 = "abc";
if(s1==b1 )
System.out.println("equal String");

In the above code s1==b1 prints "equal String"
while s==b does not print "equal"

could anyone explain to me the reason for this .
Thanks in advance

I am still not clear with your comment

'I think after forward you are pretty much done with request/response and can't use it anymore to change content received by a browser. In case of include you can.
'
could you elaborate on it.

what I have understood is that both of the methods direct to the JSP file mentioned in the method argument. ie include or forward.

could anyone tell me the difference between
req.getRequestDispatcher("try.jsp" ).forward(req ,resp)
and
req.getRequestDispatcher("try.jsp" ).include(req ,resp);

Thanks in advance

Can anybody tell me the difference between request.getParameter() and request.getAttribute().

Thanks in advance