Hashmap problem

Question

Hi I am getting only last value from hashmap
codes are below.
Then I used iterator and getting
Required string is null or empty
jsp code
<bean efine id="a" name="b" property="c"/>
<bean efine id="e" name="b" property="d"/>
<%
java.util.HashMap params = new java.util.HashMap();
params.put("a",a);
params.put("b",e);
session.setAttribute("paramsName", params);
%>
action classs code
Map paramsName = new HashMap();
paramsName=(HashMap)session.getAttribute("paramsName");
if (paramsName!=null)
{ Iterator pIter = paramsName.keySet().iterator();
while(pIter.hasNext()){
a=(String)pIter.next();}

Answer 1

How about the following:
create a class with instance variables of ints to be your counters:
public int inserts = 0;
public int updates = 0;
public int deletes = 0;name the class something... Tally maybe.
Might be nice to put in methods to increment each like so:
public void incrementInserts() {
      inserts ++;
}and so on for the other instance variables.
then you create one of these and increment its values appropriately, then put it in the hash.
Code would look something like this:
Map myMap = new HashMap();
while ( logfileIterator.hasNext()) {
     String tableName = null;
     boolean lineIsDelete;
     boolean lineIsInsert;
     boolean lineIsUpdate;
      /* put your code here to analyze the line to find out what the table name is,
          whether it's a delete, insert or update, and set above vars accordingly */
      Tally myTally = null;
      if (myMap.containsKey(tableName)) {
                   /* code for second and subsequent times you see this table name*/
                 myTally = (Tally) myMap.get(tableName);
      } else {
                 /* code for first time you see this table name */
                 myTally = new Tally();
                 myMap.put (tableName, myTally);
      if (lineIsDelete) myTally.incrementDeletes();
      /* or if you didn't write that method you could just use [u]myTally.deletes++;[/u] */
      if (lineIsInsert) myTally.incrementInserts();
      if (lineIsUpdate) myTally.incrementUpdates();
}