public static void main(String[] args) {
String str = "sdnasjhdasdaksnfcjdshdfufhaosinfdsjncxkjz";
Map<Character,Integer> map = new HashMap<Character,Integer>();
char[] arr = str.toCharArray();
for (char ch : arr) {
if (map.containsKey(ch)) {
Integer old = map.get(ch);
map.put(ch, old + 1);
} else {
map.put(ch,1);
}
}
System.out.println(map);
}
