345. Reverse Vowels of a String

345. Reverse Vowels of a String

Write a function that takes a string as input and reverse only the vowels of a string.

Example 1: Given s = “hello”, return “holle”.

Example 2: Given s = “leetcode”, return “leotcede”.

Note: The vowels does not include the letter “y”.

public class Solution { static final String vowels = "aeiouAEIOU"; public String reverseVowels(String s) { int first = 0, last = s.length() - 1; char[] array = s.toCharArray(); while(first < last){ while(first < last && vowels.indexOf(array[first]) == -1){ first++; } while(first < last && vowels.indexOf(array[last]) == -1){ last--; } char temp = array[first]; array[first] = array[last]; array[last] = temp; first++; last--; } return new

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