Java 数组 &amp;泛型:Java 等效于 C# IEnumerable<T>

问题描述

因此在 C# 中，我可以将 string[] 视为 IEnumerable.

So in C#, I can treat a string[] as an IEnumerable<string>.

是否有 Java 等价物?

Is there a Java equivalent?

推荐答案

Iterable 等价于 IEnumerable.

如果数组实现了Iterable，这将是类型系统的一个奇怪之处.String[] 是 Object[] 的实例，但 Iterable 不是 Iterable>.类和接口不能用不同的泛型参数多次实现相同的泛型接口.

It would be an odditity in the type system if arrays implemented Iterable. String[] is an instance of Object[], but Iterable<String> is not an Iterable<Object>. Classes and interfaces cannot multiply implement the same generic interface with different generic arguments.

String[] 将像增强的 for 循环中的 Iterable 一样工作.

String[] will work just like an Iterable in the enhanced for loop.

String[] 可以很容易地变成一个 Iterable:

String[] can easily be turned into an Iterable:

Iterable<String> strs = java.util.Arrays.asList(strArray);

更喜欢集合而不是数组(无论如何对于非原语).引用类型的数组有点奇怪，从 Java 1.5 开始就很少需要了.

Prefer collections over arrays (for non-primitives anyway). Arrays of reference types are a bit odd, and are rarely needed since Java 1.5.

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