如何从 float[] 中获取 Stream [英] How to get a Stream from a float[]

问题描述

当我发现一些奇怪的东西时，我正在学习如何使用 java 8 流.

I was learning how to use java 8 streams when I noticed something weird.

Arrays.stream() 有除浮点数组以外的所有方法:

Arrays.stream() has methods for everything but float arrays :

• Arrays.stream(int[]) : IntStream
• Arrays.stream(long[]) : LongStream
• Arrays.stream(double[]) : DoubleStream

同样，有 int、double 等的 Stream 实现，但没有浮点数:

Similarly, there are Stream implementations for int, double etc but not floats :

• IntStream
• LongStream
• 双流

有什么原因吗?

使用浮动流的推荐方法是什么?

what is the recommended way to work with float streams?

推荐答案

来自 Java SE 8 for the Real Impatient by Cay S. Horstmann :

from Java SE 8 for the Really Impatient by Cay S. Horstmann :

2.12.原始类型流

... 如果要存储 short、char、byte 和 boolean，请使用IntStream，对于浮点数，使用 DoubleStream.图书馆设计师认为不值得再添加五种流类型.

... If you want to store short, char, byte, and boolean, use an IntStream, and for float, use a DoubleStream. The library designers didn’t think it was worth adding another five stream types.

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