如何根据索引位置从列表中调用项目？

my_list = [10, 20, 30, 40, 50]
index = 2
item = my_list[index]
print(item)  # 输出: 30

let myList = [10, 20, 30, 40, 50];
let index = 2;
let item = myList[index];
console.log(item);  // 输出: 30

import java.util.ArrayList;

public class Main {
    public static void main(String[] args) {
        ArrayList<Integer> myList = new ArrayList<>();
        myList.add(10);
        myList.add(20);
        myList.add(30);
        myList.add(40);
        myList.add(50);
        
        int index = 2;
        int item = myList.get(index);
        System.out.println(item);  // 输出: 30
    }
}