How to fix error: The method... in the type... is not applicable for the arguments( )

ian0choi

Hello, I am new to Processing and am trying to create objects for the first time.

I keep getting the error message: The method drawSynapse(float, float) in the type sketch_2D_Circles.Synapse is not applicable for the arguments( )

What am I doing wrong? I couldn't find any reason why...

Synapse syn; //declaring the object syn

void setup(){
  size(500,500);
  background(0);
  smooth();
  ellipseMode(RADIUS);
  syn = new Synapse(10.0, 15.0); // making a new object called syn and passing in the initial variables
}

void draw(){
  syn.drawSynapse();
}

class Synapse { //the class is the blueprint for each Synapse object
  float x;
  float y;
  //float angle;

  Synapse(float tempX, float tempY){ //only add fields here that you want changed for each new synapse. 
    x = tempX;
    y = tempY;
    //angle = tempAngle;
  }

  void drawSynapse(float x, float y){
    ellipse(x, y, 10, 10); 
  }  
}

GoToLoop

Don't you see that your drawSynapse() demands 2 passing arguments? /:)
Either call it w/ those values or remove the demanding parameters from the method itself! ~:>

ian0choi

Thanks for the reply!

I'm sorry but could you or someone else please clarify what you mean by "demands 2 passing arguments" ?

Which line exactly?

ian0choi

I've deleted some code I commented out in the previous post. This is more clear:

Synapse syn; //declaring the object syn

void setup(){
  size(500,500);
  background(0);
  smooth();
  ellipseMode(RADIUS);
  syn = new Synapse(10.0, 15.0); // making a new object called syn and passing in the initial variables
}

void draw(){
  syn.drawSynapse();
}

class Synapse { //the class is the blueprint for each Synapse object
  float x;
  float y;

  Synapse(float tempX, float tempY){ //only add fields here that you want changed for each new synapse. 
    x = tempX;
    y = tempY;
  }

  void drawSynapse(float x, float y){
    ellipse(x, y, 10, 10); 
  }  
}

ian0choi

Ah, do you mean by lines 11-13 write this instead:

void draw(){
  syn.drawSynapse(10.0, 25.0);
}

Where I actually give passing arguments?

It's weird because I was simply copying the syntax of the example given in the "Getting Started with Processing" book where they do not specify passing arguments.

colouredmirrorball

Yes, that causes the error. But the real solution is probably the other way around.

void drawSynapse(){
    ellipse(x, y, 10, 10);
  }  

at line 24. Your Synapse class has two variables, x and y. So it seems logical you use those as the position for the ellipse. But if you did void drawSynapse(float x, float y) instead, it uses the x and y you gave in in line 12, which would not be the position you created the Synaps in.

_vk

Arguments are the "things" you "pass" into a function.

in a function like

void drawE (int x, int y){
     ellipse(x, y, 20 , 20);
}

x and y are the arguments or parameters.

When you call it you should use the proper type and numbers of arguments, like:

drawE(20, 30);

this would not work

drawE("string", 'c');

neither this

drawE(10);