如何添加的ArrayList＆LT;串GT;以JSON阵列 - 牢记类型安全 [英] How to add ArrayList<String> to JSON Array - keeping type safety in mind

问题描述

Eclipse中显示的类型安全警告，我想几乎所有消灭它（当然SUP pressing这将是一个选项）但不幸的是我没有任何成功。结果
你知道我如何改变我的code，以便有没有类型安全的警告了。或者是 @燮pressWarnings（未登记）的唯一途径？

Eclipse displayed a type safety warning and I tried nearly everything to eradicate it (of course suppressing it would be an option) but unfortunately I hadn't any success.
Do you know how I have to change my code so that there is no type safety warning anymore. Or is @SuppressWarnings("unchecked") the only way?

ArrayList<String> arrayList= (ArrayList<String>) Classname.getArrayList();      
JSONArray obj = new JSONArray();
obj.addAll(arrayList); 

在以下类型的安全警示的最后一行显示：

in the last line following type safety warning is displayed:

类型的安全：
   该方法的addAll（集合）属于原始类型的ArrayList。引用泛型类型的ArrayList应当参数化

Type safety: The method addAll(Collection) belongs to the raw type ArrayList. References to generic type ArrayList should be parametrized

JSONArray是 org.json.simple.JSONArray 。你会推荐另一包？

JSONArray is fromorg.json.simple.JSONArray. Would you recommend another package?

推荐答案

如果你想使用JSON工作去这个库，这个库有一个很好的支持的 HTTPS：//$c$c.google.com/p/google-gson/

If you want to work with json go this library, this library has a nice support https://code.google.com/p/google-gson/.

这是一个例子：

Gson gson = new Gson();
Collection<Integer> ints = Lists.immutableList(1,2,3,4,5);

(Serialization)
String json = gson.toJson(ints); ==> json is [1,2,3,4,5]

感谢

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