java - How to change the key of one map corresponding to a value in another map? -

i working on project in having map of string , object coming below method. , suppose if data map contains -

a = p b = q c = r d = s e = t f = u g = v h = w = x 

where a, b, c, d, e, f, g key , p, q, r, s, t, u, v there corresponding values in above map.

below method -

private void datacheck(map<string, object> data) {   } 

now have static mapping in map of string , string -

public static final map<string, string> static_mapping = collections.unmodifiablemap(new linkedhashmap<string, string>() {{  put("a","hello"); put("b","world"); put("c","titan"); put("d","david"); put("e","elephant"); put("f","fire"); put("g","gel"); }}); 

here value of key a hello, value of key b world, value of key c titan , same thing other key value pairs.

now in below method have mentioned above, getting values in map contain data shown above -

private void datacheck(map<string, object> data) {  // how extract value of key  //  static_mapping map corresponding data map key.   // print out new map here latest mappings  } 

now data map have a = p, replace hello = p because a mapped hello shown in static_mapping , same other fields well. how can efficiently?

and suppose if don't have mapping key in data map, keep is.

update:-

so new map should have data -

hello = p world = q titan = r david = s elephant = t fire = u gel = v h = w = x 

as there no mapping key h , i keep is..

    (map.entry<string, object> entry : data.entryset()) {         string key = entry.getkey();         object value = entry.getvalue();         string staticmappingvalue = (string) static_mapping.get(key);          if (staticmappingvalue != null) {             newmap.put(staticmappingvalue, value);         } else {             newmap.put(key, value);         }     } 

so newmap:

["hello":"p", "world":"q", etc..., "h":"w"] 

edited: followed antoine wils suggestion , reduced accesses maps, since question highlighted efficiency.