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.

Example

Given s = “Hello World”, return 5.

Note

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

分析

split()函数

public class Solution {
/**
* @param s A string
* @return the length of last word
*/
public int lengthOfLastWord(String s) {
if (s == null | s.isEmpty()) return 0;

// trim right space
String[] a = s.split(" ");
return a[a.length].length();
}
}