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An integer’s max value in Java is 2147483647, since Java integers are signed, right?
0xff000000 has a numeric value of 4278190080.
Yet I see Java code like this:
int ALPHA_MASK = 0xff000000; Can anyone enlighten me please?
The high bit is a sign bit. Setting it denotes a negative number: -16777216.
Java, like most languages, stores signed numbers in 2’s complement form. In this case, subtracting 231, or 2147483648 from 0x7F000000, or 2130706432, yields -16777216.