The little-known Java XOR operator can be extremely useful when in need of a parity check or a number swap. Even though not the quickest, it’s definitely a reliable operator to use within simpler codes. Let’s see what it is and how it works:

## What is the Java XOR Operator?

XOR stands for “exclusive or” operator and is also sometimes called exclusive disjunction. The Java XOR operator is represented by **^**, or carret. **^** is a bitwise operator, meaning an operator that works on the bit level. The XOR Java operator take 2 equally-sized bits and perform a logical exclusive OR comparison. If either bit is equal to 1, the operator returns 1. However, if both bits are equal to 1 or 0, the operator returns 0.

### How Does the XOR in Java Work?

Let’s take 5^6 as an example of the Java XOR operator. In binary, 5 is 101 and 6 is 110. If we compare each bit and eliminate the digits that don’t match up, the Java XOR operator will return binary 11, or 3.

## How to Use the Java XOR Operator to Your Advantage

One classic use of the XOR Java operator is swapping two numbers without using a temporary variable. The basic idea works like this:

x = x ^ y ;

y = x ^ y ;

x = x ^ y ;

After the second line, the y is now equal to the original value of X due to the associative property, and after the third command x is equal to the original value of y.

**Here is a simple example:**

*public class IntegerSwap {*

*public static void main(String a[]){*

* int x = 5;*

* int y = 9;*

* System.out.println(“Original values:”);*

* System.out.println(“x equals: “+x);*

* System.out.println(“y equals: “+y);*

* x = x^y;*

* y =x^y;*

* x= x^y;*

* System.out.println(“New Values After Swap:”);*

* System.out.println(“x equals: “+x);*

* System.out.println(“y equals: “+y);*

* }*

You could accomplish the same swap using subtraction, but that would be more likely to cause a stack overflow.

**Recommended read**: If you are interested in other useful operators you can use in Java, also check out our collection of (answered) Java interview questions!

### Conclusion

The XOR operator in Java, **^**, is a bitwise operator that compares each bit in a number and returns 0 if the numbers are the same, and 1 if they aren’t the same. The end result is that digit columns that are the same are eliminated. **^** is a useful operator for swapping numbers and also for performing parity checks.

## Reply