58 Length of Last Word

Given a string s consisting of words and spaces, return the length of the last word in the string.

A word is a maximal

substring

consisting of non-space characters only.

Example 1:

Input: s = "Hello World"
Output: 5
Explanation: The last word is "World" with length 5.

Example 2:

Input: s = "   fly me   to   the moon  "
Output: 4
Explanation: The last word is "moon" with length 4.

Example 3:

Input: s = "luffy is still joyboy"
Output: 6
Explanation: The last word is "joyboy" with length 6.

class Solution {
    public int lengthOfLastWord(String s) {
        StringBuilder sb = new StringBuilder(s);
        int count = 0;
        int flag = 0;
        for(int i = s.length()-1; i >= 0; i--){
            if (s.charAt(i) == ' ' && flag == 0){
                continue;
            }

            if (s.charAt(i) != ' '){
                count = count + 1;
                flag = 1;
            }

            if (s.charAt(i) == ' ' && flag == 1){
                break;
            }

        }

        return count;
    }
}