仅使用指针的Java交换方法

public class PointerSwap {
    public static void main(String[] args) {
        int a = 10;
        int b = 20;
        
        System.out.println("交换前：a = " + a + ", b = " + b);
        
        swap(a, b);
        
        System.out.println("交换后：a = " + a + ", b = " + b);
    }
    
    public static void swap(int x, int y) {
        int temp = x;
        x = y;
        y = temp;
    }
}

public class PointerSwap {
    public static void main(String[] args) {
        int[] arr = {10, 20};
        
        System.out.println("交换前：arr[0] = " + arr[0] + ", arr[1] = " + arr[1]);
        
        swap(arr);
        
        System.out.println("交换后：arr[0] = " + arr[0] + ", arr[1] = " + arr[1]);
    }
    
    public static void swap(int[] arr) {
        int temp = arr[0];
        arr[0] = arr[1];
        arr[1] = temp;
    }
}