什么是删除Java中的一个Array中的重复的最佳方式？ [英] What is the best way to remove duplicates in an Array in Java?

问题描述

我有一个对象数组，需要删除/过滤重复的对象。
我要去覆盖equals& hachCode上的对象元素，然后把它们粘在一个Set ...但是我想我应该至少轮询stackoverflow看看是否有另一种方法，或许一些其他API的聪明的方法？

解决方案

我同意您的方法来覆盖 hashCode（）和 equals ）并使用实现 Set 的东西。

这样做也使它绝对清晰对于任何其他开发人员来说，不需要重复的特征。

另一个原因 - 您最好选择一个满足您需求的实现：

• HashSet


• TreeSet


• LinkedHashSe t

，您不必更改代码以便将来更改实施。

I have an Array of Objects that need the duplicates removed/filtered. I was going to just override equals & hachCode on the Object elements, and then stick them in a Set... but I figured I should at least poll stackoverflow to see if there was another way, perhaps some clever method of some other API?

解决方案

I would agree with your approach to override hashCode() and equals() and use something that implements Set.

Doing so also makes it absolutely clear to any other developers that the non-duplicate characteristic is required.

Another reason - you get to choose an implementation that meets your needs best now:

• HashSet
• TreeSet
• LinkedHashSet

and you don't have to change your code to change the implementation in the future.

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