How to get a Stream from a float[]

Question

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

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

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

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

• IntStream
• LongStream
• DoubleStream

Is there a reason for that?

what is the recommended way to work with float streams?

Answer 1

Here's a better way, that doesn't involve copying the data.

DoubleStream ds = IntStream.range(0, floatArray.length)                            .mapToDouble(i -> floatArray[i]);