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Java - Bitwise XOR operator



The Bitwise XOR operator (^) is a binary operator which takes two bit patterns of equal length and performs the logical exclusive OR operation on each pair of corresponding bits. It returns 1 if only one of the bits is 1, else returns 0.

Bit_1Bit_2Bit_1 ^ Bit_2
000
101
011
110

The example below describes how bitwise XOR operator works:

50 ^ 25 returns 16

     50    ->    110010  (In Binary)
   ^ 25    ->  ^ 011001  (In Binary)
    ----        --------
     43    <-    101011  (In Binary)  

The code of using Bitwise XOR operator (^) is given below:

public class MyClass {
  public static void main(String[] args) {
    int x = 50;
    int y = 25;
    int z;

    //Bitwise XOR operation
    z = x ^ y;

    //Displaying the result
    System.out.println("z = "+ z);
  }
}

The output of the above code will be:

z = 43

Example: Swap two numbers without using temporary variable

The bitwise XOR operator can be used to swap the value of two variables. Consider the example below.

public class MyClass {
  static void swap(int x, int y) {
    System.out.println("Before Swap.");
    System.out.println("x = " + x);
    System.out.println("y = " + y);

    //Swap technique
    x = x ^ y;
    y = x ^ y;
    x = y ^ x;

    System.out.println("After Swap.");
    System.out.println("x = " + x);
    System.out.println("y = " + y);
  }

  public static void main(String[] args) {
    swap(10, 25);
  }
}

The above code will give the following output:

Before Swap.
x = 10
y = 25
After Swap.
x = 25
y = 10

❮ Java - Operators

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