Alphabet Occurance in a given String

Count Number of characters in a Given String

SOURCE : AlphabetOccurance.java

import java.util.Map;
import java.util.TreeMap;

public class AlphabetOccurance {

 /**
  * @param args
  */
 public static void main(String[] args) {
  String s = "iam in india";
  String str = s.replaceAll(" ", "");

  TreeMap tmap = new TreeMap<>();

  for (Character c : str.toCharArray()) {

   Integer freq = tmap.get(c);
   if (freq == null) {

    freq = 0;
   }

   tmap.put(c, freq + 1);

  }

  System.out.println(tmap);

  for (Map.Entry m : tmap.entrySet()) {

   if (m.getValue() > 1) {

    System.out.println(m.getKey() + "  " + m.getValue());
   }

  }
 }

}

OUTPUT

{a=2, d=1, i=4, m=1, n=2}
a  2
i  4
n  2

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