[LeetCode]520. Detect Capital
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Given a word, you need to judge whether the usage of capitals in it is right or not.
We define the usage of capitals in a word to be right when one of the following cases holds:
- All letters in this word are capitals, like "USA".
- All letters in this word are not capitals, like "leetcode".
- Only the first letter in this word is capital if it has more than one letter, like "Google".
Example 1:
Input: "USA"Output: True
Example 2:
Input: "FlaG"Output: False
字母大小写对应的ASCII码:
A65.B66.以此+1类推,a97.b98,以此1类推。Z是90
public class Solution { public boolean detectCapitalUse(String word) { int count = 0; for(char c: word.toCharArray()) if('Z'-c >=0) count++; return( count==0 || count==word.length() ||( count==1 && 'Z'-word.charAt(0)>=0 ) ); }}
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