434.文字列内の単語数(java)
, 。
, 。
:
: "Hello, my name is John"
: 5
: (LeetCode)
:https://leetcode-cn.com/problems/number-of-segments-in-a-string
。 , 。
解法一
class Solution {
public int countSegments(String s) {
if(s.length() == 0) return 0;
String[] words = s.split("\\s+");
int len = words.length;
if(len == 0) return 0;
if(words[0].equals("")) len--;
if(words[words.length-1].equals("")) len--;
return len;
}
}
解法二
class Solution {
public int countSegments(String s) {
if(s.length() == 0) return 0;
char[] words = s.toCharArray();
int count = 0;
if(words[0] != ' ') count++;
for(int i = 1; i < s.length(); i++){
if(words[i-1]==' ' && words[i]!=' ') count++;
}
return count;
}
}