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: TrueExample 2:
Input: "FlaG"Output: FalseNote: The input will be a non-empty word consisting of uppercase and lowercase latin letters.
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计算此word中大小写的个数来判断是否满足题目书写的要求。若个数flag==word.length()则表示全为大写或者小写，若flag==1，则表示第一个为大写，剩下的全为小写，此时输出为true。其他的为false。
public class demo3 { public boolean detectCapitalUse(String word) { int flag=-1; if (!Character.isLowerCase(word.charAt(0))) {//大写的 flag = 1; for (int i = 1; i < word.length(); i++) { if (!Character.isLowerCase(word.charAt(i))) { flag = flag + 1; }else { flag=flag+0; } } } if (Character.isLowerCase(word.charAt(0))) { flag=1; for (int i = 1; i < word.length(); i++) { if (Character.isLowerCase(word.charAt(i))) { flag = flag + 1 ; }else { flag=-1; break; } } } if(flag==word.length()||flag==1) return true; else { return false; } } public static void main(String[] args){ String word="USA"; demo3 r = new demo3(); System.out.PRintln(r.detectCapitalUse(word)); }}
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