Conversion of negative binary number to decimal number

[nagajyothi Avusingi]

if we have a byte value EX: 11111111 where 1 in first digit place shows that its negative number, how to get back the decimal number which will be negative.

[Stefan Wagner]

You can convert it to an int, and then convert this into a byte:

int i = Integer.parseInt ("11111111", 2);
byte b = (byte) i;

The casting in the second line is needed, to avoid the compilerwarning 'possible loss of precision'.