Java关联数组 [英] Java associative-array

问题描述

如何在PHP中创建和获取Java中的关联数组？

How can I create and fetch associative arrays in Java like I can in PHP?

例如：

$arr[0]['name'] = 'demo';
$arr[0]['fname'] = 'fdemo';
$arr[1]['name'] = 'test';
$arr[1]['fname'] = 'fname';

推荐答案

Java不支持关联数组，但这可能使用 Map 轻松实现。例如，

Java doesn't support associative arrays, however this could easily be achieved using a Map. E.g.,

Map<String, String> map = new HashMap<String, String>();
map.put("name", "demo");
map.put("fname", "fdemo");
// etc

map.get("name"); // returns "demo"

对你的例子更准确（因为你可以用任何对象替换String满足您的需求）将声明：

Even more accurate to your example (since you can replace String with any object that meet your needs) would be to declare:

List<Map<String, String>> data = new ArrayList<>();
data.add(0, map);
data.get(0).get("name"); 

有关详细信息，请参阅官方文档

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