随机点名1

点击查看代码

public class Test1 {
    public static void main(String[] args) {
        //随机点名
        ArrayList<String> list = new ArrayList<>();
        Collections.addAll(list, "张三", "李四", "王五", "赵六", "周期");

        //方法一
        /*Random r = new Random();
        int i = r.nextInt(list.size());
        System.out.println(list.get(i));*/

        //方法二
        Collections.shuffle(list);
        System.out.println(list.get(0));
    }
}