华为OJ 初级：找出字符串中第一个只出现一次的字符

import java.util.Scanner;

public class Main{
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
String input = sc.next();
System.out.println(findChar(input));
sc.close();
}

private static char findChar(String input) {
int[] count = new int[128];

for (int i = 0; i < input.length(); i++) {
count[input.charAt(i)]++;
}

for (int i = 0; i < input.length(); i++)
if (count[input.charAt(i)] == 1)
return input.charAt(i);
return '.';
}
}