find the occurrence of a character in a string code example

Example 1: how to find occurrence of words in string

HOW TO COUNT OCCURRENCE OF THE WORDS IN STRING 
(It can also be solved by using nested for loops...)

String str = "I am happy and why not and why are you not happy you should be";
   String [] arr = str.split(" ");
   Map<String, Integer> map = new HashMap<>();

   for (int i=0 ; i < arr.length ; i++){
       if (!map.containsKey(arr[i])){
            map.put(arr[i],1);
           } else{
         map.put(arr[i],map.get(arr[i])+1);
        }
        }
     for(Map.Entry<String, Integer> each : map.entrySet()){

    System.out.println(each.getKey()+" occures " + each.getValue() + " times");
    }

Example 2: number of occurrences of character in string

public class CountStringOccurence {
public static void main(String[] args) {

int count= countOccurences("aaassssddadad",'s');
System.out.println(count);

}

private static int countOccurences(String word, char character){
  
  int count = 0;
  for(int i = 0; i < word.length(); i++){
    
    if(word.chartAt(i) == character){
      
      count++; } 
                 }
      return count;
}
}