是否可以调用没有名称的函数？

Question

I tried calling a function in my code, but i get a blank screen only.

class Addition
{
    public void add(){
    int a=20;
    int b=30;
    int c=a+b;
    System.out.println("Addition of a and b is: " +c);
    }
 }
public class Methodcall
{
    public static void main(String args[])
    {
        Addition call=new Addition();

    }
}

I expect the addition of a & b But all i get is just a blank screen only

Answer 1

The code wouldn't do what you're expecting it to do:

In your main function, you're only instantiating the Addition object. Think of it as creating the object:

Addition call = new Addition();

If you want it to do something , in your case to add a and b and print the result, you will need to call the method:

call.add();

As others have mentioned, you could put it in the constructor, but that's not what the constructor is meant for.

Answer 2

 Addition call=new Addition();
 call.add();