Possibly bug in Java 7 binary literals?

You're using a signed integer. Bit 32 (the "first" one from the left) is the sign bit. It being 1 means it is a negative number, and 0 means positive.

Two's complement is then performed to give the value of -1. Read about that here.

You're using a signed integer. Bit 32 (the "first" one from the left) is the sign bit. It being 1 means it is a negative number, and 0 means positive.

Two's complement is then performed to give the value of -1. Read about that here: tfinley.net/notes/cps104/twoscomp.html.

I don't think so, System.out. Println(0b011); still printing 3 – Eng. Fouad Jan 8 at 12:53 @Eng.

Fouad - as it should. The sign bit is waaaaay to the left :) – Perception Jan 8 at 12:55 Yes as I said, bit 32 .. 0b011 is actually the following in 32-bit architecture: 00000000000000000000000000000011 – Scott W Jan 8 at 12:55 In a signed integer 0b0.... will be positive, 0b1... will be negative. This is correct.

– brainzzy Jan 8 at 12:56 @Perception oh I see, thanks – Eng. Fouad Jan 8 at 12:56.

Indeed this is a signed int so is 0xffff == 0b11111111111111111111111111111111 == -1 and not a positiv number. See also Wikipedia Two's complement.

This is not a bug at all: since int is unsigned, all bits to 1 does mean -1. The leftmost bit of a signed integer, in two's complement, is the sign bit. What you see is therefore expected.

Then why System.out. Println(0b011); prints 3? – Eng.

Fouad Jan 8 at 12:54 Maybe bin10=dec2 and bin1=dec1 -> 1+2=3 // bin=binary & dec=decimal – rekire Jan 8 at 12:56.

Java uses 32 bit signed integers, and the max/min & overflow results you are seeing are valid. For more information see: en.wikipedia.org/wiki/Integer_(computer_...).

Java's int uses 2's complement signed integers. This means the leftmost bit indicates a negative number. So int x = 0b11111111111111111111111111111111; // ^--- this bit indicates the number is negative.

The fact that all of the other bits are also 1 means that the number is (decimal) -1. See the link for details.

I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.