Counting Vowels in java

 class vowels{


    public static int findlowerCaseVowelCount(String str){
        int len = str.length();
        int vowelCount = 0;
   
        for(int i=0; i<len; i++){
            char ch = str.charAt(i);
   
            if(Character.isLowerCase(ch) == true){
                if(ch == 'a' || ch == 'e' || ch == 'i' || ch=='o' || ch == 'u'){
                    vowelCount++;
                }
            }
        }
   
        return vowelCount;
    }
   
    public static void main(String[] args) {
        String s1 = "hello";

        int count=findlowerCaseVowelCount(s1);

        System.out.println(count);
    }

}


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