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".
Otherwise, we define that this word doesn't use capitals in a right way.
Example 1:
Input: "USA"
Output: True
Example 2:
Input: "FlaG"
Output: False
Note: The input will be a non-empty word consisting of uppercase and lowercase latin letters.
分析:分别判断三种条件是否满足:全大写,全小写,首字母大写;
JAVA CODE
class Solution {
public boolean detectCapitalUse(String word) {
if(word.equals(word.toUpperCase()))
return true;
if(word.equals(word.toLowerCase()))
return true;
if(word.substring(1,word.length()).equals(word.substring(1,word.length()).toLowerCase())&&(Character.toUpperCase(word.charAt(0))==word.charAt(0)))
return true;
return false;
}
}