如何在java中将arrayList存储到数组中? [英] How to store arrayList into an array in java?

问题描述

java中如何将arrayList存入数组?

How to store arrayList into an array in java?

推荐答案

这取决于你想要什么:

List<String> list = new ArrayList<String>();
// add items to the list

现在，如果您想将列表存储在数组中，您可以执行以下操作之一:

Now if you want to store the list in an array, you can do one of these:

Object[] arrOfObjects = new Object[]{list};
List<?>[] arrOfLists = new List<?>[]{list};

但是如果您希望在数组中列出 items，请执行以下操作之一:

But if you want the list items in an array, do one of these:

Object[] arrayOfObjects = list.toArray();
String[] arrayOfStrings = list.toArray(new String[list.size()]);

参考:

• Collection.toArray()
• Collection.toArray(T[])

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