Number of Segments in a String
Given a string s, return the number of segments in the string.
A segment is defined to be a contiguous sequence of non-space characters.
Example 1:
Input: s = "Hello, my name is John"
Output: 5
Explanation: The five segments are ["Hello,", "my", "name", "is", "John"]
Example 2:
Input: s = "Hello"
Output: 1
Constraints:
0 <= s.length <= 300
s consists of lowercase and uppercase English letters, digits, or one of the following characters "!@#$%^&*()_+-=',.:".
The only space character in s is ' '.
思路一：刚开始的想法是统计空格数量，测试发现不行。最后用最简单的算法，先分割字符，最后统计合法的单词数量
public int countSegments(String s) {
int count = 0;
String[] arr = s.split("\\s");
for (String word : arr) {
if (word.trim().length() > 0) {
count++;
}
}
return count;
}