Java：“长”号在内存中占多少？

Question

do these two numbers both take equally 8bytes(64bit) in the memory? long a=25L long b=3543451651313213232168498L

Answer 1

Yes the size is fixed as per the language specification :

The integral types are byte, short, int, and long, whose values are 8-bit, 16-bit, 32-bit and 64-bit signed two's-complement integers, respectively [...].

Answer 2

long的大小是预定的，它不会根据存储的数量而改变。

Answer 3

长需要8个字节，无论它是否包含零（所有位0）或-1（所有位1）。

Answer 4

是的，原语具有固定的大小，并不依赖于它们包含的值！

Answer 5

Yes, it takes the same amount.

A long value (even 0L ) takes up 64 bit (or 8 bytes).

Answer 6

Yes both take 8 bytes. Ask yourself the question how you would differentiate between a 32 bit integer and a 'half full' 64 bit long.

Answer 7

Yes, both take equal space. In Java , primitives are allocated a constant space based on the type of primitive. Objects on the other hand, may take variable amount of space over time.