Will an int be 32bit and a long 64bit regardless of whether the system is 32 or 64 bit?

Question

在java中，无论体系结构是32位还是64位，int都保证始终为32位大小和64位大小？

Answer 1

The Java Tutorial page on primitive data types specifies the fixed sizes and makes no mention of underlying architecture having any influence

int: The int data type is a 32-bit signed two's complement integer. It has a minimum value of -2,147,483,648 and a maximum value of 2,147,483,647 (inclusive).

long: The long data type is a 64-bit signed two's complement integer. It has a minimum value of -9,223,372,036,854,775,808 and a maximum value of 9,223,372,036,854,775,807 (inclusive). Use this data type when you need a range of values wider than those provided by int.

Answer 2

int in Java is always 32-bit. No matter the OS type/architecture/whatever.

Answer 3

Java is platform independent. So int is 32-bits, and long is 64-bit.