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Java Solution for LeetCode algorithm problems, continually updating
520\. Detect Capital
Easy
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, like `"Google"`.
Given a string `word`, return `true` if the usage of capitals in it is right.
**Example 1:**
**Input:** word = "USA"
**Output:** true
**Example 2:**
**Input:** word = "FlaG"
**Output:** false
**Constraints:**
* `1 <= word.length <= 100`
* `word` consists of lowercase and uppercase English letters.