Java 关联数组 [英] Java associative-array
本文介绍了Java 关联数组的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
如何像在 PHP 中一样在 Java 中创建和获取关联数组?
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,但是这可以使用 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"
对您的示例更准确(因为您可以用任何满足您需要的对象替换 String )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");
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