Count Character Occurrence in String

import java.util.HashMap;

public class CountOccurance {

 // HashMap KEY: character STRING :count/no of Occurrence
 public static HashMap<Character, Integer> charOccurrence = new HashMap<Character, Integer>();

 static void count(String string) {

  // Character array

  char[] _array = string.toCharArray();

  for (char character : _array) {
   if (charOccurrence.containsKey(character)) {
             int _count=charOccurrence.get(character)+1;
    charOccurrence.put(character, _count);
   } else {

    charOccurrence.put(character, 1);
   }
  }

 }

 public static void main(String[] args) {
  String _str = "AASBDFGDDDDFFHFSSB";
  count(_str);
  System.out.println(charOccurrence);
 }

}

Output:{D=5, F=4, G=1, A=2, B=2, S=3, H=1}

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