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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 }
Leetcode-Length of Last Word
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