Get value from hashmap based on key to JSTL

Question

I want to get the value of HashMap based on key.

HashMap<String, ArrayList<String>> map      = new HashMap<String, ArrayList<String>>(); ArrayList<String> arrayList = new ArrayList<String>();  map.put("key", arrayList); request.setAttribute("key", map); 

What i did is

<c:forEach var="map" items="${requestScope.key}">     <c:forEach var="hash" items="${map.value}">         <option><c:out value="${hash}"/></option>     </c:forEach> </c:forEach> 

But it seems it's printing everything, what i want to do is to get the value depends on key like: hash.key or something

UPDATE:
I did something like this but it still doesn't work

<c:forEach var="map" items="${requestScope.key}">     <c:forEach var="hash" items="${map['key']}">         <option><c:out value="${hash}"/></option>     </c:forEach> </c:forEach> 

and the StackTrace: Property 'External' not found on type java.util.HashMap$Entry
I'm pretty sure that there is really that kind of key.

Answer 1

if all you're trying to do is get the value of a single entry in a map, there's no need to loop over any collection at all. simplifying gautum's response slightly, you can get the value of a named map entry as follows:

<c:out value="${map['key']}"/> 

where 'map' is the collection and 'key' is the string key for which you're trying to extract the value.

Answer 2

could you please try below code

<c:forEach var="hash" items="${map['key']}">         <option><c:out value="${hash}"/></option>   </c:forEach>