62 lines
2.6 KiB
Markdown
62 lines
2.6 KiB
Markdown
|
---
|
||
|
|
title: bitwise operator example
|
||
|
|
---
|
||
|
|
# Bitwise operators
|
||
|
|
## Truth table
|
||
|
|
|
||
|
|
|
||
|
|
The bitwise operators are similar to the logical operators, except that they work on a smaller scale -- binary representations of data. Any data can be converted to its binary equivalent. Though binary operators work at binary level but they are operated between normal decimal values only.
|
||
|
|
|
||
|
|
## Types of Bitwise Operators
|
||
|
|
|
||
|
|
### Bitwise OR
|
||
|
|
|
||
|
|
Bitwise OR is a binary operator (operates on two operands). It's denoted by |.
|
||
|
|
The | operator compares corresponding bits of two operands. If either of the bits is 1, it gives 1. If not, it gives 0.
|
||
|
|
|
||
|
|
### Bitwise AND
|
||
|
|
|
||
|
|
Bitwise AND is a binary operator (operates on two operands). It's denoted by &.
|
||
|
|
The & operator compares corresponding bits of two operands. If both bits are 1, it gives 1. If either of the bits is not 1, it gives 0.
|
||
|
|
|
||
|
|
### Bitwise Complement
|
||
|
|
|
||
|
|
Bitwise complement is an unary operator (works on only one operand). It is denoted by ~.
|
||
|
|
The ~ operator inverts the bit pattern. It makes every 0 to 1, and every 1 to 0.
|
||
|
|
|
||
|
|
### Bitwise XOR
|
||
|
|
|
||
|
|
Bitwise XOR is a binary operator (operates on two operands). It's denoted by ^.
|
||
|
|
The ^ operator compares corresponding bits of two operands. If corresponding bits are different, it gives 1. If corresponding bits are same, it gives 0.
|
||
|
|
|
||
|
|
### Left Shift
|
||
|
|
|
||
|
|
The left shift operator << shifts a bit pattern to the left by certain number of specified bits, and zero bits are shifted into the low-order positions.
|
||
|
|
|
||
|
|
### Right Shift
|
||
|
|
|
||
|
|
The right shift operator >> shifts a bit pattern to the right by certain number of specified bits.If the number is a 2's complement signed number, the sign bit is shifted into the high-order positions.
|
||
|
|
|
||
|
|
### Unsigned Right Shift
|
||
|
|
|
||
|
|
The unsigned right shift operator >>> shifts zero into the leftmost position.
|
||
|
|
|
||
|
|
### Example bitwise operators :
|
||
|
|
```java
|
||
|
|
int a = 60; /* 60 = 0011 1100 represents 60 in binary*/
|
||
|
|
int b = 13; /* 13 = 0000 1101 */
|
||
|
|
int c = 0;
|
||
|
|
|
||
|
|
c = a & b; /* 12 = 0000 1100 */
|
||
|
|
c = a | b; /* 61 = 0011 1101 */
|
||
|
|
c = a ^ b; /* 49 = 0011 0001 */
|
||
|
|
c = ~a; /*-61 = 1100 0011 :Invert all bits */
|
||
|
|
|
||
|
|
// shift operators : zeros are shifted in to replace the discarded bits
|
||
|
|
c = a << 2; /* 240 = 1111 0000 : Shift left 2 bits*/
|
||
|
|
c = a >> 2; /* 15 = 1111 */
|
||
|
|
c = a >>> 2; /* 15 = 0000 1111 : Zero fill right shift*/
|
||
|
|
|
||
|
|
```
|
||
|
|
**FOR FURTHER INFORMATION:** <a href="https://docs.oracle.com/javase/tutorial/java/nutsandbolts/op3.html">Click Here</a>
|