Monday, August 20, 2012

How to count duplicate characters from a sentence in java



Output :

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 ch1[]=str.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("No of Characters are : "+hm.toString());
       
       
   
       }

}

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