Please use the below function to find the count of vowels in a string passed as the method argument: public static void getVowelsCounts(String str) { int count = 0; int n = str.length(); for (int i = 0; i < n; i++) { switch (str.charAt(i)) { case 'a': case 'e': case 'i': case 'o': case 'u': count++; break; default: } } System.out.println("Total number of vowels are " + count); } }