Bitwise and BitShift Operators in Java — AND, OR, XOR, Signed Left and Right shift Operator Examples
Bitwise and Bit Shift Operators in Java are a powerful set of operators that allows you to manipulate bits on integral types like int, long, short, bytes, and boolean data types in Java. Bitwise and Bit shift operator is among the fastest operator in Java but still, many Java programmers don’t familiar with bitwise and bitshift operations, especially those who don’t come from C programming backgrounds. If you have already learned C or C++ before starting with Java then understanding bitwise and bitshift operators are quite easy in Java, because it’s similar to the bitwise operation in C.
Some of th e tricky programming interview questions e .g. checking if a number is power of tw o or swapping two numbers without temporary variable or, can be easily solved using bitwise operators.
This Java programming tutorial is a quick recap of different bitwise operator available in Java and how to use them. This tutorial also discusses bit shift operators, both signed and unsigned for example.
1. Bit and Byte Basics
Before exploring bitwise and bit shift operator in Java, its prerequisite that you must be familia r with binary format, bits, bytes and bit wise operations like AND, OR, XOR, NOT etc. Knowledge of binary arithmetic is also important to understand code written using bitwise operators in Java programming language.
Shift bits in java
«Очень интересно» . Только НЕПОНЯТНО. Зачем это нужно? Хорошо, что у нас есть Гугл, который говорит: Побитовые операции пременяются для быстрого выполнения вычислений и меньшего потребления ресурсов, связанных с этими вычислениями. Если б с этих слов начиналась статья, дальше уже хоть 100 страниц текста, читались бы на релаксе.
https://javarush.com/quests/lectures/questsyntaxpro.level08.lecture06 вот в этой лекции из квеста javarush сказано, что не все операции выполняются с лева на право, а например унарные операции выполняются с права на лево, а тут пишут — «Все операции выполняются слева направо, однако с учетом своего приоритета.» кто ошибается, подскажите пожалуйста))
Для чего нужны Сдвиги влево и в право? хоть бы один реальный пример из программы выполняющей конкретную задачу
Замечательно написано! Освежила в памяти знания, все просто понятно логично и подробно. Александр, спасибо за лекцию!
JavaRush — это интерактивный онлайн-курс по изучению Java-программирования c нуля. Он содержит 1200 практических задач с проверкой решения в один клик, необходимый минимум теории по основам Java и мотивирующие фишки, которые помогут пройти курс до конца: игры, опросы, интересные проекты и статьи об эффективном обучении и карьере Java‑девелопера.
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Shift bits in java
- Binary representation of a given number
- Count set bits in an integer
- Add two bit strings
- Turn off the rightmost set bit
- Rotate bits of a number
- Compute modulus division by a power-of-2-number
- Find the Number Occurring Odd Number of Times
- Program to find whether a given number is power of 2
- Find position of the only set bit
- Check for Integer Overflow
- Find XOR of two number without using XOR operator
- Check if two numbers are equal without using arithmetic and comparison operators
- Detect if two integers have opposite signs
- How to swap two numbers without using a temporary variable?
- Russian Peasant (Multiply two numbers using bitwise operators)
- Swap bits in a given number
- Smallest of three integers without comparison operators
- Compute the minimum or maximum of two integers without branching
- Smallest power of 2 greater than or equal to n
- Program to find parity
- Check if binary representation of a number is palindrome
- Generate n-bit Gray Codes
- Check if a given number is sparse or not
- Euclid’s Algorithm when % and / operations are costly
- Calculate square of a number without using *, / and pow()
- Copy set bits in a range
- Check if a number is Bleak
- Gray to Binary and Binary to Gray conversion
- Next higher number with same number of set bits
- Find the maximum subarray XOR in a given array
- Find longest sequence of 1’s in binary representation with one flip
- Closest (or Next) smaller and greater numbers with same number of set bits
- Bitmasking and Dynamic Programming | Travelling Salesman Problem
- Compute the parity of a number using XOR and table look-up
- XOR Encryption by Shifting Plaintext
- Count pairs in an array which have at least one digit common
- Python program to convert floating to binary
- Booth’s Multiplication Algorithm
- Number of pairs with Pandigital Concatenation
- Find the n-th number whose binary representation is a palindrome
- Find the two non-repeating elements in an array of repeating elements/ Unique Numbers 2
- Write an Interview Experience
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- Bitwise Algorithms
- Introduction to Bitwise Algorithms – Data Structures and Algorithms Tutorial
- Bitwise Operators in C/C++
- Bitwise Operators in Java
- Python Bitwise Operators
- JavaScript Bitwise Operators
- All about Bit Manipulation
- Little and Big Endian Mystery
- Bits manipulation (Important tactics)
- Binary representation of a given number
- Count set bits in an integer
- Add two bit strings
- Turn off the rightmost set bit
- Rotate bits of a number
- Compute modulus division by a power-of-2-number
- Find the Number Occurring Odd Number of Times
- Program to find whether a given number is power of 2
- Find position of the only set bit
- Check for Integer Overflow
- Find XOR of two number without using XOR operator
- Check if two numbers are equal without using arithmetic and comparison operators
- Detect if two integers have opposite signs
- How to swap two numbers without using a temporary variable?
- Russian Peasant (Multiply two numbers using bitwise operators)
- Swap bits in a given number
- Smallest of three integers without comparison operators
- Compute the minimum or maximum of two integers without branching
- Smallest power of 2 greater than or equal to n
- Program to find parity
- Check if binary representation of a number is palindrome
- Generate n-bit Gray Codes
- Check if a given number is sparse or not
- Euclid’s Algorithm when % and / operations are costly
- Calculate square of a number without using *, / and pow()
- Copy set bits in a range
- Check if a number is Bleak
- Gray to Binary and Binary to Gray conversion
- Next higher number with same number of set bits
- Find the maximum subarray XOR in a given array
- Find longest sequence of 1’s in binary representation with one flip
- Closest (or Next) smaller and greater numbers with same number of set bits
- Bitmasking and Dynamic Programming | Travelling Salesman Problem
- Compute the parity of a number using XOR and table look-up
- XOR Encryption by Shifting Plaintext
- Count pairs in an array which have at least one digit common
- Python program to convert floating to binary
- Booth’s Multiplication Algorithm
- Number of pairs with Pandigital Concatenation
- Find the n-th number whose binary representation is a palindrome
- Find the two non-repeating elements in an array of repeating elements/ Unique Numbers 2