使用 Java 字典...使用哈希表? [英] Using Java Dictionary...use a Hashtable?

问题描述

我有点惊讶没有人问过这个特定案例，因为它在 Java 标准库中有点奇怪的不一致:

I'm a bit surprised no one has asked about this specific case, cause it's kind of a weird inconsistency in the java standard libraries:

我正在使用带有自定义标签的 Swing JSlider；唯一可用于分配标签的库调用是:setLabelTable(Dictionary labels)

I'm using swing JSliders with custom labels; the only library call available to assign labels is: setLabelTable(Dictionary labels)

但是 Dictionary 是一个抽象类，它在标准库中唯一已知的子类是 Hashtable，它的 api &各种 IDE 都抱怨，因为它过时了".

But Dictionary is an abstract class, and its only known subclass in the standard lib is Hashtable, which the api & various IDE's complain about because it's "obsolete."

显而易见的事情就是使用哈希表，但我想知道两件事:

The obvious thing to do is just use the Hashtable, but I'm wondering two things:

1. 有没有更好的方法来解决这个问题?
2. 如果Hashtable是唯一的这个(在我看来)相当重要的库的可用类调用，它在什么基础上过时"了?

谢谢！

推荐答案

Hashtable 过时的原因是 因为它被Hashmap替换了.

The reason Hashtable is obsolete is because it was was replaced with Hashmap.

然而，为了给 setLabelTable 分配标签，Hashtable 的不足"不是问题.

However, for the purposes of assigning labels to a setLabelTable, the "deficiencies" of Hashtable are not a problem.

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