存储随机数字

1.生成6个1~33之间的随机整数，添加到集合，并遍历集合。

    public static void main(String[] args) {
        ArrayList<Integer> list = new ArrayList<>();
        Random ra = new Random();
        for (int i = 0; i <6; i++) {
            int i1 = ra.nextInt(33) + 1;
            list.add(i1);
        }
        for (int i = 0; i <list.size(); i++) {
            System.out.println(list.get(i));
        }
    }

 

 2.自定义4个学生对象，添加到集合，并遍历。

    public static void main(String[] args) {
        ArrayList<Person> list = new ArrayList<>();
        Person p1 = new Person("张三",11);
        Person p2 = new Person("李四",12);
        Person p3 = new Person("王五",19);
        Person p4 = new Person("赵六",22);
        list.add(p1);
        list.add(p2);
        list.add(p3);
        list.add(p4);

        for (int i = 0; i < list.size(); i++) {
            Person per = list.get(i);
            System.out.println("姓名:"+per.getName()+",年龄:"+per.getAge());
        }
    }

 

 

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标签：练习题,Arraylist,list,per,Person,add,new,ArrayList
来源： https://www.cnblogs.com/pengtianyang/p/16423544.html