How to exchange two numbers in Java

In C/C ++, we can use pointers or references to solve the problem, such as the following C code:

 

Void swap (int * a, int * B)
...{
Int temp = *;
* A = * B;
* B = temp;
}

Or the following C ++ code:

 

Void swap (Int & A, Int & B)
...{
Int temp =;
A = B;
B = temp;
}

However, it is troublesome to implement this function in Java.

You can try it first.

 

I will describe how to implement this function below:

 

Class wrappednumber <t extends number> ...{

Private t I = NULL;

Public wrappednumber (t I )...{
This. I = I;
}

Public t getnumber ()...{
Return I;
}

Public void setnumber (t I )...{
This. I = I;
}
}


Public class hello ...{

Public static <t extends number> void swap (wrappednumber <t> A, wrappednumber <t> B )...{
T temp1 = A. getnumber ();
A. setnumber (B. getnumber ());
B. setnumber (temp1 );
}

Public static void main (string [] ARGs )...{

Wrappednumber <short> A = new wrappednumber <short> (short) 10 );
Wrappednumber <short> B = new wrappednumber <short> (short) 20 );

Hello. <short> swap (A, B );

System. Out. println ("the answer is: a =" + A. getnumber () + ", B =" + B. getnumber ());
}
}