How to remove and modify the values ??

HashMap

HashMap<String, Integer> hm=new HashMap<String, Integer>();
  int i=hm.get("abc");
  i++;
  

This does not modify the "abc" corresponding value , is there any way you
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direct coverage on the line, use the put (key, value) method override
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HashMap hm = new HashMap ();
int i = hm.get ("abc");
hm.put ("abc", i + +);