题解 | #提取不重复的整数#
提取不重复的整数
https://www.nowcoder.com/practice/253986e66d114d378ae8de2e6c4577c1
import java.util.*; // 注意类名必须为 Main, 不要有任何 package xxx 信息 public class Main { public static void main(String[] args) { Scanner in = new Scanner(System.in); // String line1 = in.nextLine(); String line = in.nextLine(); char[] chars = line.toCharArray(); //set 不重复集合 Set<Character> set = new LinkedHashSet<>(); for (int i = chars.length - 1; i >= 0; i--) { if (!(set.contains(chars[i]))) { set.add(chars[i]); } } Iterator<Character> iterator = set.iterator(); while (iterator.hasNext()) { System.out.print(iterator.next()); } } }