Java integer storage is in 2 complement form

Read Java's source code this morning and discover:

The following value is used when the calculator is converted to decimal:

And then I wonder, the minimum value of an integer, can't be how big is it?

Then decisively write code verification:

The Riddle reveals:

0x80000000 is the minimum value of integer, but the form of the complement is stored, this special value, according to the arithmetic rules, the original code is also this value .

The code rules for the complement transcoding are as follows:

Positive number: Original code = Inverse Code = complement

Negative Number: The original code = complement to reverse (sign bit of the figure) + the bottom 1

Original code to complement:

Positive: complement = original Code = Inverse Code

Negative: complement = original code negation (number outside the sign bit) + 1

Summary: tamping basic knowledge

Java integer storage is in 2 complement form