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  • Leetcode-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.

    水题

    逐字符从后往前扫描遇到空格就返回就行了

     1     public int lengthOfLastWord(String s) {
     2         if(s == null || s.length() ==0){
     3             return  0;
     4         }
     5         s = s.trim();
     6         byte[] sBytes = s.getBytes();
     7         int j= sBytes.length-1;
     8         int total  = 0;
     9         while(j>=0 && sBytes[j] != 32){
    10             j --;
    11             total ++;
    12         }
    13         return total;
    14     }
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  • 原文地址:https://www.cnblogs.com/dijkstra-c/p/3952151.html
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