因为特别的二，所以二的特别。

在C/C++里面交换值的方法： 1 2 3 4 5 6 7 8 [cpp] view plaincopyprint? void swap(int&a ,int&b)   {       int temp;       temp = a;       a = b;       b = temp;   }

If Java uses the pass-by reference, why won't a swap function work? Your question demonstrates a common error made by Java language newcomers. Indeed, even seasoned veterans find it difficult t