Why is absolute of Integer.MIN_VALUE equivalent to Integer.MIN_VALUE

Question

In java when I say Integer i = Math.abs(Integer.MIN_VALUE). I get the same value as the answer,which means i contains Integer.MIN_VALUE

Answer 1

You might expect that absolute value of Integer.MIN_VALUE would be Integer.MAX_VALUE + 1, but this value is out of primitive int size. And Integer.MAX_VALUE + 1 is Integer.MIN_VALUE again. That's all.