Dijkstra Algorithm view (Node, Edges)

Processing Coding Questions
15

I did it like this now. So the nodes are in the ArrayList. Probably not right but a beginning. But i didnt create the ArrayList inside the class Node, as you can see. Is it right?
In mouseClicked the Nodes will be added to the List.

import java.util.ArrayList; 


void setup() {
  size(600,600);
}


 void draw() {
 
   
}
 
 void mouseClicked(){
   
  // loop over Array of nodes to check if there is another node
   
  Node knoten = new Node(mouseX,mouseY); 
  
  // Adding node
  NodeList.add(knoten);
 // println(NodeList.size());
 // println(NodeList.indexOf(knoten));

 }
  
 
    
ArrayList<Node> NodeList = new ArrayList<Node>();    
  
// class Node    
 public class Node extends Zaehler {
  private float x;
  private float y;
  int knotennummer;


void draw(){
  
// display(); 
  
}

  public Node(float x, float y){
    hochzaehler();
    this.x = x;
    this.y = y;
    display();
  }
  
  public void display(){
    strokeWeight(2);
    stroke(0); // black
    fill(0);
    ellipse(x, y, 60, 60);
    
    fill(255);
    textSize(20);
    text(knotennummer,x,y); //number inside the node
  }

void hochzaehler(){
 
  knotennummerzaehler ++;
  knotennummer = knotennummerzaehler;
  
 }
   
  
}

static class Zaehler{
  
  
 static int knotennummerzaehler = -1;

 
  
}  
class Edge {
  
  
  
  void display(){
  
  //line();
  
}
  
    Edge(){
   
    fill(0);
    line(mouseX, mouseY,0,0);
    
   
   
 }
  
   
}