Monday, August 20, 2012

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';
        char ch1[]=str.toUpperCase().toCharArray();
        HashMap<Character,Integer> hm=new HashMap<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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