This week's book giveaway is in the JavaFX forum. We're giving away four copies of Introducing JavaFX 8 Programming and have Herbert Schildt on-line! See this thread for details.

The binary of 4 "00000100" If you do a complement if becomes "11111011" which is actually -5. Just remember this when you do a complement on a positive number the resulting negative number will be one greater than the original positive number with a negative sign.

~4 = -(4+1)

When we are doing a complement we are actually doing a two's complement.