CheckVowels.java

packagecom.thealgorithms.strings;

importjava.util.Set;

/**
 * Vowel Count is a system whereby character strings are placed in order based
 * on the position of the characters in the conventional ordering of an
 * alphabet. Wikipedia: https://en.wikipedia.org/wiki/Alphabetical_order
 */
publicfinalclassCheckVowels {
privatestaticfinalSet<Character> VOWELS = Set.of('a', 'e', 'i', 'o', 'u');

privateCheckVowels() {
 }

/**
 * Checks if a string contains any vowels.
 *
 * @param input a string to check
 * @return {@code true} if the given string contains at least one vowel, otherwise {@code false}
 */
publicstaticbooleanhasVowels(Stringinput) {
if (input == null || input.isEmpty()) {
returnfalse;
 }

for (charc : input.toLowerCase().toCharArray()) {
if (VOWELS.contains(c)) {
returntrue;
 }
 }
returnfalse;
 }
}