Java 数组 &泛型:Java 等效于 C# IEnumerable<T> [英] Java Arrays & Generics : Java Equivalent to 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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