分析以下需求，并用代码实现 键盘读取一行输入,去掉其中重复字符, 打印出不同的那些字符

**import java.util.LinkedHashSet;
import java.util.Scanner;
public class Test02 {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        System.out.println("请你输入一段字符串:");
        String s = sc.nextLine();
        LinkedHashSet lhs = new LinkedHashSet<>();
        for (int i = 0; i < s.length(); i++) {
            char c = s.charAt(i);
            lhs.add(c);
        }
        System.out.println(lhs);
        StringBuilder sb = new StringBuilder();
        for (Character lh : lhs) {
            sb.append(lh);
        }
        String s1 = sb.toString();
        System.out.println(s1);
    }
}**