明明的随机数（java）

import java.util.Iterator;
import java.util.Scanner;
import java.util.TreeSet;

public class RandomDataSort {

public static void main(String[] args) {
Scanner scan = new Scanner(System.in);
int num = scan.nextInt();

TreeSet<Integer> tSet = new TreeSet<Integer>();
while (num != 0) {
tSet.add(scan.nextInt());
num--;
}

Iterator<Integer> it = tSet.iterator();
while (it.hasNext()) {
System.out.println(it.next());
}
}

}