Given a string s, reverse only all the vowels in the string and return it.
The vowels are 'a', 'e', 'i', 'o', and 'u', and they can appear in both lower and upper cases, more than once.
573Please respect copyright.ＰＥＮＡＮＡxLhpSKQUIy
Two Pointers
class Solution {573Please respect copyright.ＰＥＮＡＮＡGmuOn89k6L
// Return true if the character is a vowel (case-insensitive)573Please respect copyright.ＰＥＮＡＮＡFwnOGMIDQd
// booleann(for ture or false), 創造"isVowel"(class), 命名(char c), and add aeiouAEIOU573Please respect copyright.ＰＥＮＡＮＡ5ijimU5Z36
// 當 (char c) 不是vowel，return false/ 是vowel，return true
// * a||b = ab 全为 false 时，计算结果为 false，否则为 true。573Please respect copyright.ＰＥＮＡＮＡY4jUMRrCCH
boolean isVowel(char c) {573Please respect copyright.ＰＥＮＡＮＡkm273tJNbk
return c == 'a' || c == 'i' || c == 'e' || c == 'o' || c == 'u'573Please respect copyright.ＰＥＮＡＮＡ6tpaci61fu
|| c == 'A' || c == 'I' || c == 'E' || c == 'O' || c == 'U';573Please respect copyright.ＰＥＮＡＮＡqO3HtbvG4b
}573Please respect copyright.ＰＥＮＡＮＡFtVtWYRmiU
573Please respect copyright.ＰＥＮＡＮＡsS4wBrYPhL
// Function to swap characters at index x and y573Please respect copyright.ＰＥＮＡＮＡSipF2oPZdO
void swap(char[] chars, int x, int y) {573Please respect copyright.ＰＥＮＡＮＡR85TJyehKF
char temp = chars[x];573Please respect copyright.ＰＥＮＡＮＡ0onCV2PYqM
chars[x] = chars[y];573Please respect copyright.ＰＥＮＡＮＡiWhFAZVDdd
chars[y] = temp;573Please respect copyright.ＰＥＮＡＮＡsWtApgDqxB
}573Please respect copyright.ＰＥＮＡＮＡs9R9Qf8IT5
573Please respect copyright.ＰＥＮＡＮＡruKLMkgzuq
public String reverseVowels(String s) {573Please respect copyright.ＰＥＮＡＮＡNfOyLR5Lga
// 設定最左的字母是[0]573Please respect copyright.ＰＥＮＡＮＡKyra9c1auM
int start = 0;573Please respect copyright.ＰＥＮＡＮＡ2Fwjj82FeQ
// 設定最右的字母是[文字總長度-1].573Please respect copyright.ＰＥＮＡＮＡpYuLTIcruF
int end = s.length() - 1;573Please respect copyright.ＰＥＮＡＮＡFsLEeHzkxc
// 將 String 轉換為 char 數組，因為 String 在 Java 中是不可變的573Please respect copyright.ＰＥＮＡＮＡ5fKnVi93db
char[] sChar = s.toCharArray();573Please respect copyright.ＰＥＮＡＮＡ8cSpijsFI4
573Please respect copyright.ＰＥＮＡＮＡNM40SK0lpa
// While we still have characters to traverse573Please respect copyright.ＰＥＮＡＮＡ8wVURQhs6o
// while the word more than one letter, do this function573Please respect copyright.ＰＥＮＡＮＡpK9pYqTWfc
while (start < end) {573Please respect copyright.ＰＥＮＡＮＡ6eL3zvtXJf
// Find the leftmost vowel573Please respect copyright.ＰＥＮＡＮＡuDul6owcIj
// while start 少於 string length() 同時 [start] 不是vowel，return start ++573Please respect copyright.ＰＥＮＡＮＡiJ8aSkBu3X
while (start < s.length () && !isVowel(sChar[start])) {573Please respect copyright.ＰＥＮＡＮＡt3QFzXRjgM
start++;573Please respect copyright.ＰＥＮＡＮＡjKGzKHNmkH
}573Please respect copyright.ＰＥＮＡＮＡv25vFI1H1a
// Find the rightmost vowel573Please respect copyright.ＰＥＮＡＮＡGkaRRKkCgO
// while end 大於 0 同時 [end] 不是vowel，return end --573Please respect copyright.ＰＥＮＡＮＡYao4bFayNM
while (end >= 0 && !isVowel(sChar[end])) {573Please respect copyright.ＰＥＮＡＮＡ1Im0xTYLmV
end--;573Please respect copyright.ＰＥＮＡＮＡggACf9jTL3
}573Please respect copyright.ＰＥＮＡＮＡ7gVb1qZoEq
// Swap them if start is left of end573Please respect copyright.ＰＥＮＡＮＡTbjA29524d
// swap function: (in what string, value 1, value 2), swap value 1 and 2573Please respect copyright.ＰＥＮＡＮＡmMxh5pY85L
if (start < end) {573Please respect copyright.ＰＥＮＡＮＡfo5TRD3F1p
swap(sChar, start++, end--);573Please respect copyright.ＰＥＮＡＮＡdGnNeor1xB
}573Please respect copyright.ＰＥＮＡＮＡmUtW1A1HAE
}573Please respect copyright.ＰＥＮＡＮＡs6Z5ztTtEn
573Please respect copyright.ＰＥＮＡＮＡPD5Okl2SyS
// Converting char array back to String573Please respect copyright.ＰＥＮＡＮＡ28fleqcYvo
// 顯示新的String573Please respect copyright.ＰＥＮＡＮＡIo6f7v2U6j
return new String(sChar);573Please respect copyright.ＰＥＮＡＮＡfHGiMnzf5W
}573Please respect copyright.ＰＥＮＡＮＡkR0Pa8XodF
};
and then Add to home screen.