Java程序如何编写一个随机出数字号码

Java程序如何编写一个随机出数字号码import java.util.*;public class RandomStudentId{private int studentID;private Random rand = new Random();//private Set s = new HashSet();public void RandID(){studentID = rand.nextInt(1000); //这里写多少，就是从0到1000的随机数字}public int getID(){return studentID;}public String toString(){return "Student ID: " + studentID;}public static void main(String[] args){RandomStudentId rsi = new RandomStudentId();for(int i=0; i<100; ++i){rsi.RandID();System.out.println("NO." + rsi.getID());}}}有点像随即数字竞猜