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Length of Last Word

时间:2015-04-12 06:43:40      阅读:113      评论:0      收藏:0      [点我收藏+]

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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.

solution:代码很简单,但是考虑的情况要很详细。

public class Solution {
    public int lengthOfLastWord(String s) {
        if(s.length()==0||s==null||s==" "){
            return 0;
        }
        int n=s.length();
        while(n>1&&s.charAt(n-1)==‘ ‘){
            n--;
        }
        int count=0;      
        while(n>0){
            n--;
            if(s.charAt(n)!=‘ ‘){
            count++;
            }else{
                break;
            }
            
        }
        return count;
    }
}

 

Length of Last Word

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原文地址:http://www.cnblogs.com/joannacode/p/4418979.html

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