What is the ~ operator for

Question

Hi all i have for loop with a ~ operator never found this before on any of the code

    for (int i = 0; i < bytes.length; i++) {
        mashed[i] = (byte) ~bytes[i];

        }

what does the ~ do?

i haven't found anything like this on the internet or before anywhere so maybe someone can help me thanks in advance

As an addition to the posted answers: [Bitwise and Bit Shift Operators](http://docs.oracle.com/javase/tutorial/java/nutsandbolts/op3.html) and [The Java® Language Specification: 15.15.5. Bitwise Complement Operator ~](http://docs.oracle.com/javase/specs/jls/se7/html/jls-15.html#jls-15.15.5) — informatik01, Jun 29 '13 at 15:16

score 4 · Answer 1 · edited May 23 '17 at 10:25

4

Its an operator of ~ bitwise NOT

The bitwise NOT "~" operator inverts each bit in the operand i.e. this operator changes all the ones to zeros and all the zeros to ones.

All operators

And to know how internally works :How does the bitwise complement (~) operator work?

edited May 23 '17 at 10:25

Community

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answered Jun 29 '13 at 15:14

Suresh Atta

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score 2 · Answer 2 · answered Jun 29 '13 at 15:13

2

It is the bitwise complement operator.

Example:

If the value is 2 (0000 0010), the bitwise complement is 1111 1101

answered Jun 29 '13 at 15:13

karthikr

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score 2 · Answer 3 · answered Jun 29 '13 at 15:16

From Java's tutorials, http://docs.oracle.com/javase/tutorial/java/nutsandbolts/op3.html,

The unary bitwise complement operator "~" inverts a bit pattern; it can be applied to any of the integral types, making every "0" a "1" and every "1" a "0". For example, a byte contains 8 bits; applying this operator to a value whose bit pattern is "00000000" would change its pattern to "11111111".

score 1 · Answer 4 · answered Jun 29 '13 at 15:14

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It is bitwise operator which will apply not gate on every bit of the data. Eg when data bits are 101, then it will become 010.

answered Jun 29 '13 at 15:14

Dan Bray

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score 1 · Answer 5 · answered Jun 29 '13 at 15:14

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The ~ is for bitwise inversion -- 0s become 1s, 1s become 0s.

answered Jun 29 '13 at 15:14

jedwards

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score 1 · Answer 6 · answered Jun 29 '13 at 15:14

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The ~ operator is bitwise NOT, it inverts the bits in a binary number:

NOT 011100
  = 100011

answered Jun 29 '13 at 15:14

Mohit Bhansali

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score 1 · Answer 7 · answered Jun 29 '13 at 15:15

From the docs:

The unary bitwise complement operator "~" inverts a bit pattern; it can be applied to any of the integral types, making every "0" a "1" and every "1" a "0". For example, a byte contains 8 bits; applying this operator to a value whose bit pattern is "00000000" would change its pattern to "11111111".

score 0 · Answer 8 · answered Jun 29 '13 at 15:17

0

The Tilde (~) does a bitwise compliment of a numerical value.

1011 0011 = ~0100 1100

answered Jun 29 '13 at 15:17

Alexey

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What is the ~ operator for

8 Answers8