Determine if String Halves Are Alike
给一个string, 问二分后, 是不是包含相同数目的元音字符.
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class Solution { public boolean halvesAreAlike(String s) { s = s.toLowerCase(); Set<Character> set = new HashSet<>(); set.add('a'); set.add('e'); set.add('i'); set.add('o'); set.add('u'); int left = 0; int right = 0; for(int i = 0; i < s.length() / 2; i++) { if(set.contains(s.charAt(i))) left++; } for(int i = s.length() / 2; i < s.length(); i++) { if(set.contains(s.charAt(i))) right++; } return left == right; } } |