Java SE(25) operator-bit operator

Bit operator

The bit operator is a symbol for performing operations on each bit of the binary , and it is specifically for new operations on 0 and 1.

Operator	Calculation	example	result
&	Bitwise and  (All are 1 to 1)	0&0	0
		0&1	0
		1&0	0
		1&1	1
|	Bitwise or    (1 is 1)	0|0	0
		0|1	1
		1|0	1
		1|1	1
^	Bitwise XOR   (The difference is 1)	0^0	0
		0^1	1
		1^0	1
		1^1	0
~	Negate	~0	1
		~1	0
<<	Shift left	(Positive number) 0 000 0010 << 2	0000 1000
		(Negative number) 1 001 0011<<2	0100 1100
>>	Shift right	0110 0010>>2	0001 1000
		1110 0010>>2	1111 1000
>>>	Unsigned right shift	0110 0010>>>2	0001 1000
		11...1110 0010>>>2	0011...11 1000

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

table of Contents

Bit operator

Bit operator &

Bit operator|

Bitwise operator^

Bitwise operator~

Bit operator <<

Bitwise operator >>-signed right shift

Bitwise operator >>>-unsigned right shift

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Bit operator &

The bit operator & is to perform an AND operation on the two binary numbers involved in the operation . If both binary bits are 1, the result of the bit operation is 1, otherwise it is 0.

Example:     

Bit operator|

The bit operator & is to perform an OR operation on two binary numbers involved in the operation . If one of the binary digits has a value of 1, the result of the bit is 1, otherwise it is 0.

Example:

Bitwise operator^

The bit operator ^ is to perform XOR operation on two binary numbers involved in the operation . If the binary bits are the same, the value is 0, otherwise it is 1.

Example:

Bitwise operator~

Bit operator ~ only operates on one operand. If the binary bit is 0, the inverse value is 1; if the binary bit is 1, the inverse value is 0.

Example:

Bit operator <<

The bit operator << is to move all binary bits of the operand one bit to the left . During operation, the space on the right is filled with 0 , and the left part is discarded .

Example:

Interview questions: The fastest way to 4x8-4<<3.

Bitwise operator >>-signed right shift

The bit operator >> is to move all binary bits of the operand one bit to the right . In operation, when the left side of the slot depending on the sign bit of the original 1 or the complement 0 (the original is negative to make 1 is a positive number would complement 0 ).

Example:

Bitwise operator >>>-unsigned right shift

The bit operator >>> moves all the binary bits of the operand one bit to the right . During operation, the left space is filled with 0 (the positive and negative numbers of the original number are not considered).

Example:

public class FuShu {
	public static void main(String[] args) {
		System.out.println(Integer.toBinaryString(-6));
		
		int m=-6;
		m=m>>>2;
		System.out.println(Integer.toBinaryString(m));
		System.out.println(m);
	}
}

operation result: