Changing HashMap keys during iteration

Question

is it possible to change keys of a the same HashMap instance during iteration ? Because map entry set don't have a method entry.setKey(). Now what I can think off is create another HashMap...

MultipartParsingResult parsingResult = parseRequest(request);  Map<String, String[]> mpParams = parsingResult.getMultipartParameters(); Map<String, String[]> mpParams2 = new HashMap<String, String[]>();  Iterator<Entry<String,String[]>> it = mpParams.entrySet().iterator();  while (it.hasNext()) {     Entry<String,String[]> entry = it.next();     String name = entry.getKey();      if (name.startsWith(portletNamespace)) {         mpParams2.put(name.substring(portletNamespace.length(), name.length()), entry.getValue());     }     else {         mpParams2.put(name, entry.getValue());     } } 

Answer 1

Maybe this helps:

map.put(newkey,map.remove(oldkey));