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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.
答案
public class Solution {
public int lengthOfLastWord(String s) {
if(s==null||s.length()<=0)
{
return 0;
}
int end=s.length();
int start=end-1;
for(;start>=0;start--)
{
if(s.charAt(start)==' ')
{
if(end==start+1)
{
end=start;
}
else
{
break;
}
}
}
return end-start-1;
}
}Length of Last Word
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