Is it possible to update the values in hashmap or add new elements when iterating over it? -


i have hashmap, , want update values when iterating on it, , if possible add new elements. believe throw concurrentmodification exception. so, there way achieve or it's not possible?

as far know best can removing , updating values while cycling. try following

public static void main(string[] args) {      hashmap<string, string> map = new hashmap<string, string>();     map.put("one", "lemon");     map.put("two", "orange");     map.put("three", "kiwi");      iterator<entry<string, string>> = map.entryset().iterator();      while (it.hasnext())     {          map.entry entry = (map.entry) it.next();          string key = (string)entry.getkey();          //removal         if(key.equals("one"))             it.remove();          //update         if(key.equals("two"))             entry.setvalue("lime");      } }

inserting new element in map cause exception. if need so, should fill second hashmap values of first, , modify @ will. in other words, can build second hashmap while cycling on first, , can manage needed flexibility.


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