Java随机生成5注双色球

@Test
public void testCaiPiao(){
    for (int j = 0; j < 5; j++) {
        List<Integer> caipiao = new ArrayList<>();
        for (int i = 0; i < 6; i++) {
            int tmp = (int) (Math.random()*33+1);
            while (caipiao.contains(tmp)){
                tmp = (int) (Math.random()*33+1);
            }
            caipiao.add(tmp);
        }
        Collections.sort(caipiao);
        caipiao.add(new Random().nextInt(15)+1);
        System.out.println(caipiao);
    }

}