bit manipulation - Why java bitwise compliment not fliping properly? -

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i have following code:

int b1 = 0b1011; b1 = ~b1; system.out.println(integer.tobinarystring(b1));

but not getting expected result i.e. 100

what getting 11111111111111111111111111110100.

can 1 please explain this?

you flipping integer consists of 4 bytes, i.e., 32 bits. first 28 bits 0. getting flipped, too, results in number get. before flipping:

b1 = 0b00000000000000000000000000001011

after flipping:

b1 = 11111111111111111111111111110100

in order rid of unwanted 1's logically , b1 after flipping bits:

b1 = ~b1 b1 = b1 & 0b1111

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