我怎么能初始化我一般数组？ [英] How can I initialize my generic array?

问题描述

我想拥有的ArrayList的数组：

I want to have an array of ArrayLists:

ArrayList<MyClass>[] myArray;

我想通过以下code将其初始化：

I want to initialize it by the following code:

myArray = new ArrayList<MyClass>[2];

但我得到这个错误：

But I get this error:

Cannot create a generic array of ArrayList<MyClass>

我怎么能初始化呢？

How can I initialize it?

推荐答案

这是不严格可能在Java中并没有得到实施至今。

This is not strictly possible in Java and hasn't been since its implementation.

您可以解决它像这样：

ArrayList<MyClass>[] lists = (ArrayList<MyClass>[])new ArrayList[2];

这可能（实际上，它应该）生成一个警告，但没有其他的办法来解决它。在所有诚实，你会过得更好，以创建一个的ArrayList 的的ArrayList 取值：

This may (really, it should) generate a warning, but there is no other way to get around it. In all honesty, you would be better off to create an ArrayList of ArrayLists:

ArrayList<ArrayList<MyClass>> lists = new ArrayList<ArrayList<MyClass>>(2);

后者是什么，我会推荐。

The latter is what I would recommend.

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