Uma Balu

hi,

where do you have the source file of Balance?? Ensure, it doesn't get compiled again when you try to compile the NewClass.... i.e... remove Balance.java from MyJava folder...

Uma...

Hi,
out.println("<td>" + rs.getInt(1) + "</td>"); out.println("<td><A HREF=?action=PlaceBid.jsp&ad=\" + rs.getInt(1) + \">Bid</A></td>");
You are using rs.getInt(1) twice. Instead of that, use, rs.getInt(1) only once, get the value and store it in a temp variable and use the temp variable in all other places.
Hope this helps you,
Uma...

Hi Sreedhar,
NULL represents a NullPointerException. May be you are trying to access some object which has a null value.
Uma.

Hi,
System ----- > Class present in the java.lang package which cannot be instantiated.
out -------- > Static final variable declared in the System class.Hence, you say System.out(without creating a instance of the Sustem class). It is of the type java.io.PrintStream.
println ---- > Method present in the PrintStream class to send the output to the specified stream.Since, out is an instance of PrintStream, we say out.println to invoke this method.

Uma

Hi,
How did you deploy??? Created a war file or deployed the folder itself??? If there is an uncaught exception raised, you may get that erro. Try using a error page, so that the exception will be known while invoking the page.
Regards,
Uma..

Hi,
Generally, we will create only a reference to an interface. Your code,
UserDAO ud = new UserDAO(); ud.findUserPassword( String username );
will not compile because, you are trying to instantiate an interface, which is not possible.
May be, you can use it this way,
UserDAO ud = new MySQLUserDAO(); ud.findUserPassword("username");
Thanks,
Uma.

Hi,
Vector[] table = new Vector[10] ; table[0] = new Vector() ; table[0].add("test") ; System.out.println(table[0].get(0)) ;
Will this solve your problem???
Uma...

Hi,
Do you have the package com.wrox.databases in the classpath?? Just check if you have put the classes from com.wrox.databases package in the "lib" folder of your application folder.
webapps
|
---yourApp
|
----WEB-INF
|
----lib
|
---com
|
---wrox etc...

Hope this helps you,
Uma.

Hi,
The question is answered here
Regards,
Uma..

Hi,
As per my understanding of ur code, the same thing will work fine in JSP also. You can use, <%= %> kind of expression in JSP also. If in case you want to extract the querystring part of your url, lets say, u have something like this,
http://www.someserver.com?name=uma&password=test
Then, if you use request.getQueryString(), then u can get the contents after the ?, ie, name=uma&password=test can be retrieved.
I hope this is what you are looking for...
Uma...

Hi,
JSP does not distinguish between get and post methods of submit. To obtain any parameter value, use request.getParameter("param_name").
Uma.

Hi,
Your Code:
class Sup { protected int x,y; //no argument constructor public Sup() { x=0; y=0; } public Sup(int a,int b) { x=a; y=b; //implicit calling toString() System.out.println(this); } public String toString() { return "["+x+","+y+"]"; } } //Code:Sub class Sub extends Sup { protected double radius; //no argument constructor public Sub() { //implicit call Super construtor radius=0; System.out.println(this); } public Sub(double r,int a,int b) { super(a,b); radius=r; //implicit calling toString() System.out.println(this); } public String toString() { return "["+super.toString()+"+"+radius+"]"; } } //Code:Test public class Test { public static void main(String arg[]) { Sub b=new Sub(4.5,64,32); Sub c=new Sub(10,5,5); } }
The problem is with toString() function, in sense, you are trying to create the instance of the sub class, so, after the super class constructor is invoked, when u try printing "this", the sub class version of "toString()" is invoked. Since, the sub class data member "radius" is not initialized the 0.0 is printed first, later the sub class construtor initializes the "radius" and then calls the sub class version of "toString()" and hence the value is printed propertly.
Hope this helps u,
Uma.

Hi Bear....
Hmm.. That's nice idea, let me try if there are any IE specific headers available.
Thanks a lot,
Uma.

Hi,
Yes, that was argument, but this has been posted a bug by the QA and we ought to find a way out... any resources that you can point to???
Thanks,
Uma..

Hi all,
I have a JSP file which will display a link. On click of the link, it will try opening a csv file from the server, the option is given to the user to either save or open the file from the same location. When the user tries to save the file, the save dialog box displays the name like "filename[1].csv". How to avoid this autonumbering with the file name?? The code that I have used is
response.setContentType("text/csv"); response.setHeader("Content-Disposition", "attachment; filename=\"" + reqFileName.trim() + "\"");
Is there any other better approach???
Thanks and Regards,
Uma.