在一个字符串中找到第一个只出现一次的字符

public class MSX_Q7 {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        String str = scanner.nextLine();
        System.out.println(findFirstNoDuplicatedChar(str) );


    }
    private static char findFirstNoDuplicatedChar(String str) {
        for (int i = 0; i < str.length(); i++) {
            if (str.lastIndexOf(str.charAt(i)) == str.indexOf(str.charAt(i))) {
                return str.charAt(i);
            }
        }
        return 0;
    }
}

 

 

 

 

出处http://blog.csdn.net/beiyeqingteng/article/details/7447920