Leetcode_58_Length of Last Word

Given a string s consists of upper/lower-case alphabets and empty space characters

' '

, return the length of last word in the string.

If the last word does not exist, return 0.

Note: A word is defined as a character sequence consists of non-space characters only.

For example,
Given s =

"Hello World"

,
return

5

.

JAVA代码实现如下所示。

public int lengthOfLastWord(String s) {
if (s == null || s.length() == 0)
return 0;
int len = s.length();
int count = 0;
for (int i = len - 1; i >= 0; i--) {
if (s.charAt(i) == ' ') {
if (count == 0)
continue;
else
return count;
}
count++;
}
return count;
}