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/**

* Created by YGZ on 2016/3/10.

*/

public class LengthofLastWord {

public int lengthOfLastWord(String s) {

char[] chars = s.toCharArray();

if (chars.length<1) return 0;

if (chars.length==1&&chars[0]!=' ') return 1;

if (chars.length==1&&chars[0]==' ') return 0;

int res = 0;

for (int i=chars.length-1;i>=0;i--){

if (chars[i]!=' '){

res++;

}

if (res==0&&chars[i]==' ') continue;

if (chars[i]==' ') return res;

}

return res;

}

public static void main(String args[]){

String s = "a ";

LengthofLastWord lengthofLastWord = new LengthofLastWord();

System.out.println(lengthofLastWord.lengthOfLastWord(s));

}

}