JAVA中的swap怎么写，交换a,b的值

在Java中，`swap`函数通常用于交换两个整型变量的值，而不需要创建额外的临时变量。以下是使用`swap`方法交换变量`a`和`b`的值的简单实现：

public class Main {
    public static void main(String[] args) {
        Integer a = 1;
        Integer b = 2;
        System.out.println("Before swapping: a = " + a + ", b = " + b);

        // Call the swap method
        swap(a, b);

        System.out.println("After swapping: a = " + a + ", b = " + b);
    }

    /**
     * The swap function takes two integers and swaps their values in-place.
     */
    public static void swap(Integer a, Integer b) {
        a = a ^ b;   // XOR operation to swap without using a temporary variable
        b = a ^ b;   // After this step, a holds the original value of b
        a = a ^ b;   // And after this, a holds the original value of a (now swapped with b)
    }
}[^1]