get hashmapvalues of arraylist

[kumar amara]

iam getting result set as hashmap and storing them in a an arraylist and returning that arraylist to the method callers.
When i applied iterator on that returned arraylist with itr.hasnext () iam getting key and values also
BUT for some reasons i just want to get only values from arraylist
could some one suggest me please

and if some one have an idea to get resultset object arraylist values. bcz when i did that iam getting 2nd row data repeated infinately.

[Jan Cumps]

Moving to our 'Java in General' forum.

[Vijitha Kumara]

When i applied iterator on that returned arraylist with itr.hasnext () iam getting key and values also..

So don't add the keys in to the ArrayList.
Not sure what to suggest without looking at your code though.
Please UseRealWords when posting here, because instead bcz...

[Seetharaman Venkatasamy]

kumar amara wrote:iam getting result set as hashmap and storing them in a an arraylist and returning that arraylist to the method callers.

can you ellaborate ? here what do you mean by *result set * ?

[kumar amara]

while (rs.next())   
            {   
                  HashMap row = new HashMap();   
                  results.add(row);   
                  for(int i=1; i<=columns; i++)   
                  {   
                     row.put(metaData.getColumnName(i),rs.getObject(i));   
					 
                  }   
                     

thsi is how i get the rresultset into hashmap and then storing it in an arraylist
when i iterate with this arraylist iam getting hashkey,datavalue
but i want to get only the values

there is no hashmap method to get only values without key

and in arraylist i don't find useful info regarding how to get only value without key
so any kindly helpme so that i can display that values in my table rows to display to the user
i also tried to get the resultset to arraylist of arraylist and when i usse get twise which is neeeded to get arraylist in arraylist it gives me irrelavent data.
if any one having idea

with arraylist of arraylist then it will be fine

hope i will get any one success way
i googled but no way to get the exact info!

[Vijitha Kumara]

Do you need the column names as well or only the values? How are you suppose to set the values to be passed to the caller?

there is no hashmap method to get only values without key

There's a Map.values() method.

and in arraylist i don't find useful info regarding how to get only value without key

ArrayList is not a Map so doesn't know anything about key-value pairs.

[Seetharaman Venkatasamy]

kumar amara wrote:
the rresultset into hashmap and then storing it in an arraylist
when i iterate with this arraylist iam getting hashkey,datavalue

when you iterate the list, you *should* get the Map . then use value() as vijitha suggested or entrySet()

[kumar amara]

let s iam getting that arraylist into my servlet with

 ArrayList status= ....(); 

so how could i get a map.value able to call from arraylist

(for i=o;i<status.size;i++)
map=status.get(i)
map.value=...........

like this any worked example will be useful,
and I Have a Great doubt on why arraylist not Able to SEND to JSP page successfuly
what are the prerequisites to do this.

ANY exact idea on arraylist to jsp successfully dispatched one there
or should i display from servlet only through printwriter

[Seetharaman Venkatasamy]

kumar amara wrote: any worked example will be useful,

please google

kumar amara wrote:
ANY exact idea on arraylist to jsp successfully dispatched one there

Use one of the scope , something like this *request.setAttribute("objName","Show Some Effort")*

kumar amara wrote:
or should i display from servlet only through printwriter

No. use out[JspWriter is an implicit Object in jsp] . but I suggest you to go for EL which is a good practice

hth

[kumar amara]

is it confirmed that arraylist or any resultset in servlet should go to jsp successfully only if EL is used in JSP.
and jsp writer is to be used where in servlet or in JSP,

please google

thank you !

[Vijitha Kumara]

kumar amara wrote:is it confirmed that arraylist or any resultset in servlet should go to jsp successfully only if EL is used in JSP.

Not sure what you mean by "go to jsp..". But you use JSTL, EL, Standard/Custom actions to maniplate data in JSPs these days, not Scriptlets/Scriplet expressions etc..