How To Count Occurrences Of Each Character In String In Java?

import java.util.HashMap; public class CountCharInStringJavaInHouse {       public static void main(String[] args)     {        countCharacter("How many number each character is there in string using hashmap");     }     static void countCharacter(String inputString)     {                  HashMap<Character, Integer> resultMap = new HashMap<Character, Integer>();                  char[] strArray = inputString.toCharArray();         for (char c : strArray)         {                      if(resultMap.containsKey(c) )             {                 resultMap.put(c, resultMap.get(c)+1);             }             else             {                 resultMap.put(c, 1);             }                    }         System.out.println(resultMap);     }     }

OutPut:

Occurrences Of Each Character In String