52 lines
1.3 KiB
Java
52 lines
1.3 KiB
Java
package strings;
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/**
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* Vowel Count is a system whereby character strings are placed in order based on the position of
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* the characters in the conventional ordering of an alphabet. Wikipedia:
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* https://en.wikipedia.org/wiki/Alphabetical_order
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*/
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class CheckVowels {
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public static void main(String[] args) {
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assert !hasVowels("This is a strings");
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assert hasVowels("Hello World");
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assert hasVowels("Java is fun");
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assert !hasVowels("123hi");
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assert hasVowels("Coding vs Programming");
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}
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/**
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* Check if a string is has vowels or not
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*
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* @param input a string
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* @return {@code true} if given string has vowels, otherwise {@code false}
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*/
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public static boolean hasVowels(String input) {
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if (input.matches("[AEIOUaeiou]")) {
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countVowels(input);
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return true;
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}
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return false;
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}
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/**
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* count the number of vowels
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*
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* @param input a string prints the count of vowels
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*/
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public static void countVowels(String input) {
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input.toLowerCase();
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int count = 0;
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int i = 0;
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while (i < input.length()) {
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if (input.charAt(i) == 'a'
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|| input.charAt(i) == 'e'
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|| input.charAt(i) == 'i'
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|| input.charAt(i) == 'o'
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|| input.charAt(i) == 'u') {
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count++;
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}
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i++;
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}
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System.out.println(count);
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}
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}
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