Why my solution is wrong? TSORT

general
1

import java.util.Scanner;
import java.util.Set;
import java.util.TreeSet;

public class TSORT {

public  static  void  main(String[] args)
{
    Scanner scanner = new Scanner(System.in);
    Integer count = scanner.nextInt();
    Set<Integer> arrayList = new TreeSet<>();
    for (Integer i = 0 ; i <  count ; i++)
    {

        Integer x = scanner.nextInt();
        arrayList.add(x);
    }

    for (Integer example : arrayList)
    {
        System.out.println(example);
    }
}

}