# Java 程序：使用按位 XOR 運算符交換兩個數字 > 原文： [https://beginnersbook.com/2017/09/java-program-to-swap-two-numbers-using-bitwise-xor-operator/](https://beginnersbook.com/2017/09/java-program-to-swap-two-numbers-using-bitwise-xor-operator/) 這個 java 程序使用[按位 XOR 運算符](https://beginnersbook.com/2017/08/operators-in-java/)交換兩個數字。在通過程序之前，讓我們看看什么是按位 XOR 運算符：按位 XOR 比較兩個操作數的相應位，如果它們相等則返回 1，如果它們不相等則返回 0。例如： ```java num1 = 11; /* equal to 00001011*/ num2 = 22; /* equal to 00010110 */ ``` `num1 ^ num2`比較`num1`和`num2`的相應位，如果它們不相等則生成 1，否則返回 0.在我們的例子中它將返回 29，相當于 00011101 讓我們在 [Java](https://beginnersbook.com/java-tutorial-for-beginners-with-examples/) 程序中寫一下： ## 示例：使用按位運算符交換兩個數字 ```java import java.util.Scanner; public class JavaExample { public static void main(String args[]) { int num1, num2; Scanner scanner = new Scanner(System.in); System.out.print("Enter first number:"); num1 = scanner.nextInt(); System.out.print("Enter second number:"); num2 = scanner.nextInt(); /* To make you understand, lets assume I am going * to enter value of first number as 10 and second * as 5\. Binary equivalent of 10 is 1010 and 5 is * 0101 */ //num1 becomes 1111 = 15 num1 = num1 ^ num2; //num2 becomes 1010 = 10 num2 = num1 ^ num2; //num1 becomes 0101 = 5 num1 = num1 ^ num2; scanner.close(); System.out.println("The First number after swapping:"+num1); System.out.println("The Second number after swapping:"+num2); } } ``` **輸出：** ```java Enter first number:10 Enter second number:5 The First number after swapping:5 The Second number after swapping:10 ```