如何在数组中返回对象？

let array = [];
let obj = { key: 'value' };
array.push(obj);
console.log(array); // 输出: [{ key: 'value' }]

array = []
obj = {'key': 'value'}
array.append(obj)
print(array)  # 输出: [{'key': 'value'}]

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

public class Main {
    public static void main(String[] args) {
        List<Object> array = new ArrayList<>();
        Object obj = new Object() {
            public String key = "value";
        };
        array.add(obj);
        System.out.println(array); // 输出: [{key=value}]
    }
}

using System;
using System.Collections.Generic;

class Program {
    static void Main() {
        List<object> array = new List<object>();
        var obj = new { Key = "value" };
        array.Add(obj);
        Console.WriteLine(array); // 输出: [{ Key = value }]
    }
}