Hi, I'm trying to implement trees in Processing recursively.

Here is the class I defined :

1. class Tree {
     int page;
     ArrayList next = new ArrayList();
     Arbre precedent = new Arbre(-1);
   
     Arbre(int p) {
       page = p;
     }
   
     void addTreeSon(Tree son) {
       son.precedent = this;
       next.add(son);
     }
   
     void addElementSon(int n) {
       Tree son = new Tree(n);
       son.precedent = this;
       next.add(son);
     }

Unfortunately, if I call this class:

1. Tree t = new Tree(0);

I get the following error message: This sketch is attempting too much recursion.

It's the first time I've been trying recursivity in Processing, could someone help me solve this problem ?
Thank you very much !