Can we make a class having implemented methods as an abstract class!?

Question

abstract class Myclass
{

public static int add(int a,int b)
{
return a+b;
}
public static int sub(int a,int b)
{
return a-b;
}
}

Answer 1

Do you mean like this?
https://code.sololearn.com/cOWJgnMX10gY/?ref=app
Just note that abstract methods cannot be static as well.

Answer 2

Notice how in Denise Roßberg 's code the concrete class MyCalc did not even have to be instantiated as the members of the abstract base class were static.

Answer 3

Do you mean something like this?

https://code.sololearn.com/cvsrxiYqotGs/?ref=app

Eshu Kamisetty
Edit: I added an abstract class which extends myClass

Answer 4

https://code.sololearn.com/cBpjnoYQ7oaf/?ref=app
Please refer my code for answer

Answer 5

I am expecting subclass which implements all methods of abstract class, main method in it.
And is the abstract class valid?