Passing Objects to a Method

[Larry Lai]

Hi everyone,
How're you doing?
One basic knowledge I'm not familiar with is 'Passing Objects to a Method'
The sample code is as below:

public static void main(String []args){
    Sphere ball = new Sphere(10.0, 1.0, 1.0, 1.0);
    obj.change(ball);
    //.....
}
  

  
Sphere change(Sphere s){
   s.changeRadius(1.0);
   return s;
}

It's from textbook and it's talked about Passing Object to a Method.
The main point that the author talks about is "copy the reference from obj" then, made it to the s...
I'm not sure what it is? Does anyone know about that ?

Thanks
Larry

[Dirk Schreckmann]

Take a look at Part 4 (especially chapters 26, 28, and 29) of Bradley Kjell's Introduction to Computer Science using Java.

[Dirk Schreckmann]

...and don't miss the "Cup Size" and "Pass-by-Value Please" stories of the JavaRanch Campfire Stories.

[Larry Lai]

Hi Dirk,

Thanks a lot what you have done.

Larry