java int size fixed or variable?

Question

Is integer size in java of fixed length or variable size?

ex: 1 or 10000 does both the number takes same space during allocation?

Answer 1

Java integers are 32 bits (4 octets) as per the JLS.

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.

Source: JLS §4.2 Primitive Types and Values