how to count selected Character from a sentence in java

Output:

C contents  3 times.

DuplicateCharacter.java

package com.swain.cell;

import java.util.HashMap;

public class DuplicateCharacter {

       /**

        * @param args

        */

       public static void main(String[] args) {

              // TODO Auto-generated method stub

        String str = "Character duplicate word example java";

        char selectedchar='C';

        charch1[]=str.toUpperCase().toCharArray();

        HashMap<Character,Integer> hm=newHashMap<Character,Integer>();

        for(int i=0; i<ch1.length; i++)

        {

            char ch=ch1[i];

            hm.put(ch,(hm.get(ch)==null?1:hm.get(ch)+1));

        }

      

        System.out.println(selectedchar+" contents  " + hm.get(selectedchar)+ " times.");

       

       

   

       }

}

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