Can we have a string array in the session.putValue? 1

[sreeky]

I have this code which is not functioning any idea why?

String[] rsarray = new String[rssize];
..
..
..
session.putValue("rsarray1", rsarray);
..
..
error while compiling =>

etxrpt_serv.java:249: cannot resolve symbol
symbol : variable rsarray
location: class xxx.yyy.zzz.test
session.putValue("rsarray1", rsarray);
^
etxrpt_serv.java:249: warning: putValue(java.lang.String,java.lang.Object) in javax.servlet.http.HttpSession has been deprecated
session.putValue("rsarray1", rsarray);
^
1 errors
1 warning

 

[wushutwist]

Since the full code is not available then I can only speculate. Yes, you can definitely put an array into a Session Object. Are you sure that rsarray is in scope by the time you try to add it? Lastly, use setAttribute instead of putValue, as stated putValue has been deprecated.

 

[sreeky]

thanx as you said the array was out of scope and i also got rid os putValue()

Thanks a lot!
sreeky

 

[sreeky]

since i had some problem using strings ............i am now using vectors.....i have this code which gives me this error...........java.lang.NullPointerException
at the line.........Vector vrs = (Vector) session.getAttribute("vrs" I am basically trying to use this vector which was created in another servlet and the servlet code is.....

Vector vrs = new Vector();
while ( rs.next()) {
int i=0;
String table_data = rs.getString(1);
out.println(C_RPT_PRTY + &quot;<BR>&quot;
vrs.add(i, table_data);
i++;
}
session.setAttribute(&quot;vrs&quot;, vrs);

what is the problem??

-sreeky

 

[sreeky]

since i had some problem using strings ............i am now using vectors.....i have this code which gives me this error...........java.lang.NullPointerException
at the line.........Vector vrs = (Vector) session.getAttribute(&quot;vrs&quot; I am basically trying to use this vector which was created in another servlet and the servlet code is.....

Vector vrs = new Vector();
while ( rs.next()) {
int i=0;
String table_data = rs.getString(1);
out.println(table_data + &quot;<BR>&quot;
vrs.add(i, table_data);
i++;
}
session.setAttribute(&quot;vrs&quot;, vrs);

what is the problem??

-sreeky

 

[wushutwist]

You are trying to get a Session Attribute that doesn't exist yet. If the attribute does not exist getAttribute returns null and trying to cast null to a Vector is going to throw an exception. Here is a simple piece of code to avoid this error.

Vector vrs = null;
if (session.getAttribute("vrs") != null) {
  vrs = (Vector) session.getAttribute("vrs"); 
}

Also, in the future it would be better to start a new topic when you post different questions. It is likely to get a better response and adds to the organization of questions so the search feature becomes more useful for returning relevant information.