如果线程安全不是一个问题，ArrayList与Vectors在Java中 [英] ArrayList vs. Vectors in Java if thread safety isn't a concern

问题描述

Vector 和 ArrayList 的性能有很大的区别吗？在线程安全不是问题的任何时候都使用ArrayLists是好的做法吗？

Is there really that much of a difference between the performance of Vector and ArrayList? Is it good practice to use ArrayLists at all times when thread safety isn't an issue?

推荐答案

- 收集API天数，并已经改装，因为它是它的一部分。从我读过的内容，它不被弃用的原因是因为核心API依赖于它。

Vector originates back from the pre-Collections API days, and have been retrofitted since to be a part of it. From what I've read, the reason it is not deprecated is because the core API depends on it.

ArrayList是从零开始编写的，作为Collections API的一部分，因此应该使用，除非你需要支持低至1.2的Java版本。

ArrayList was written from scratch as a part of the Collections API and as such should be used unless you need to support Java versions down to 1.2.

如果你需要一个线程安全的ArrayList，你可以使用静态工厂方法 Collections.synchronizedList（new ArrayList< type>）; 来生成您的列表。

If you need a thread-safe ArrayList, you can use the static factory method Collections.synchronizedList(new ArrayList<type>); to generate your list.

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