买彩票-36随机选择7位数

public class Demo2 {

public static void main(String[] args) {
HashSet<Integer> hs = new HashSet<Integer>();
Random r = new Random();
while (hs.size() <= 6) {
int t = r.nextInt(37);//范围是[0,36)
if (t != 0) {//彩票数字不能为0
hs.add(t);

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

}

}