public class ArrayListDemo1 {

  public static void main(String[] args) {

    // 创建Random 对象

    Random random = new Random();

    // 创建ArrayList 对象

    ArrayList<Integer> list = new ArrayList<>();

    // 添加随机数到集合

    for (int i = 0; i < 6; i++) {

      int r = random.nextInt(33) + 1;

      list.add(r);

    }

    // 遍历集合输出

    for (int i = 0; i < list.size(); i++) {

      System.out.println(list.get(i));

    }

  }

}

public class TestStudent {

    public static void main(String[] args) {

        //创建集合对象

        ArrayList<Student> list = new ArrayList<Student>();

        //创建学生对象

        Student s1 = new Student("赵丽颖",18);

        Student s2 = new Student("唐嫣",20);

        Student s3 = new Student("景甜",25);

        Student s4 = new Student("柳岩",19);

        //把学生对象作为元素添加到集合中

        list.add(s1);

        list.add(s2);

        list.add(s3);

        list.add(s4);

        //遍历集合

        for(int x = 0; x < list.size(); x++) {

            Student s = list.get(x);

            System.out.println(s.getName()+"‐‐‐"+s.getAge());

        }

    }

}