Arena types include: The ValueLayout interface models values of basic data ... to access memory segments: MemorySegment point = Arena.ofAuto().allocate(8 * 2); point.set(ValueLayout.JAVA_DOUBLE ...

Reserving memory for specific purposes. At startup, operating systems and applications reserve fixed amounts of memory (RAM) and may allocate more ... For example, Java and the .NET environment ...

If all of the values fall within the range of a float, it makes sense to use the smaller Java data type in this situation, otherwise the array elements needlessly consume memory.