如何在 Java 16 中将 UUID 转换为 jdk.incubator.vector.Vector，反之亦然

Question

从 UUID 转换为 jdk.incubator.vector.Vector（不确定哪种基本类型，可能是 Float？）的最佳方法是什么，反之亦然？

Answer 1

I'm not sure about the 'best' way since that depends on what operations you need to do on the vector afterwards and possibly your machine architecture, but a UUID could be turned into a two-element 64-bit-integer vector taking its two halves using UUID.getLeastSignificantBits() and UUID.getMostSignificantBits() :

UUID uuid = UUID.randomUUID();
LongVector vector = LongVector.fromArray(LongVector.SPECIES_128, new long[] {uuid.getLeastSignificantBits(), uuid.getMostSignificantBits()}, 0);

To go the other way, use LongVector.lane() :

UUID x = new UUID(vector.lane(1), vector.lane(0));

(assuming element ordering was the same as the first example)