题目

class Solution {
    public int firstUniqChar(String s) {
    	int[] sum = new int[26];
		char[] num = s.toCharArray();
		
		for(int i=0;i<num.length;i++) {
			sum[num[i]-'a']++;
		}
		for(int j=0;j<num.length;j++) {
			if(sum[num[j]-'a'] == 1) {
				return j;
			}
		}
		return -1;                
}
}

题目

import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		String s = sc.nextLine();
		String[] sum = s.split(" ");
		System.out.println(sum[sum.length-1].length());
		sc.close();
		}
}