如何在Java中使用List（java list怎么用）

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

public class Main {
    public static void main(String[] args) {
        int[] ids = {111, 112, 113, 114, 115, 116};
        String[] names = {"张三", "李四", "王五", "马六", "阮七", "刘八"};
        String[] genders = {"男", "女", "男", "女", "男", "女"};

        //存放所有学生信息
        List<Map<String, Object>> students = new ArrayList<>();
        for (int i = 0; i < ids.length; i++) {
            Map<String, Object> stu = new HashMap<String, Object>();
            stu.put("id", ids[i]);
            stu.put("name", names[i]);
            stu.put("gender", genders[i]);
            students.add(stu);
        }

        System.out.println("学号\t\t姓名\t\t性别");

        //得到所有学生信息
        for (Map<String, Object> stu : students)
            System.out.println(stu.get("id").toString() + "\t\t" + stu.get("name") + "\t\t" + stu.get("gender"));
    }
}