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  1. import java.util.*;
  2. import java.lang.*;
  3.  
  4. class Main
  5. {
  6.     public static void main (String[] args) throws java.lang.Exception {
  7.  
  8.         Map<String,Object> oldMap = new HashMap<String,Object>();
  9.         Map<String,Object> newMap = new HashMap<String,Object>();
  10.  
  11.         oldMap.put("initials","Y. J.");
  12.         oldMap.put("firstName","Yogend");
  13.         oldMap.put("lastName","Jos");
  14.         oldMap.put("userName","YNJos");
  15.         oldMap.put("age","33");
  16.  
  17.         newMap.put("initials","Y. J.");
  18.         newMap.put("firstName","Yogendra");
  19.         newMap.put("lastName","Joshi");
  20.         newMap.put("userName","YNJoshi");        
  21.         newMap.put("age","33");
  22.  
  23.         Map<String,Boolean> diffMap = Main.scanForDifferences(oldMap, newMap);
  24.  
  25.         Iterator<Map.Entry<String, Boolean>> it = diffMap.entrySet().iterator();
  26.         while (it.hasNext()) {
  27.             Map.Entry<String,Boolean> entry = (Map.Entry<String,Boolean>)it.next();            
  28.             System.out.println("Field [" + entry.getKey() +"] is " +(entry.getValue()?"NOT ":"") + "different" );
  29.         }        
  30.  
  31.     }
  32.  
  33.     private static Map<String,Boolean> scanForDifferences(Map<String,Object> mapOne, Map<String,Object> mapTwo){
  34.         Map<String,Boolean> retMap = new HashMap<String,Boolean>();
  35.  
  36.         Iterator<Map.Entry<String, Object>> it = mapOne.entrySet().iterator();
  37.         while (it.hasNext()) {
  38.             Map.Entry<String,Object> entry = (Map.Entry<String,Object>)it.next();            
  39.             if (mapTwo.get(entry.getKey()).equals(entry.getValue()))
  40.                 retMap.put(entry.getKey(), new Boolean(Boolean.TRUE));
  41.             else 
  42.                 retMap.put(entry.getKey(), new Boolean(Boolean.FALSE));
  43.             it.remove(); // prevent ConcurrentModificationException
  44.         }
  45.         return retMap;                                
  46.     }
  47. }
Success #stdin #stdout 0.06s 380160KB
comments (?)
stdin 
Standard input is empty
stdout 
Field [lastName] is different
Field [initials] is NOT different
Field [age] is NOT different
Field [userName] is different
Field [firstName] is different
https://ideone.com/dIaYsK
language:
Java (HotSpot 12)
created:
12 years ago
visibility:
public

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