Main打印空值和0；而不是正确的名称；由于数组/列表问题

import java.util.ArrayList;
import java.util.List;

public class Main {
    public static void main(String[] args) {
        // 初始化列表
        List<String> names = new ArrayList<>();
        names.add("Alice");
        names.add("Bob");
        names.add("Charlie");

        // 检查索引是否越界
        int index = 2; // 假设这是从某个输入获取的索引
        if (index >= 0 && index < names.size()) {
            String name = names.get(index);
            System.out.println("Name at index " + index + " is: " + name);
        } else {
            System.out.println("Index out of bounds!");
        }

        // 检查空指针异常
        if (names != null) {
            for (String name : names) {
                System.out.println(name);
            }
        } else {
            System.out.println("List is null!");
        }
    }
}