Java stack overflow Error when trying to add a child to a general tree

In Java I am creating a tree to function like a basic file system. When I try to add a child to the root node, I get a "stackoverflowerror". I read online that the error means there is too much recursion somewhere but I can't see where that is. How do I fix my code to keep from getting the error? Thank You!

public class Node<File> {
private File data = null;
private Node<File> parent = null;
private List<Node<File>> children = new ArrayList<>();

public Node(File data){
    this.data = data;
}

public Node(File data, Node<File> parent){
    this.data = data;
    this.setParent(parent);
}

public List<Node<File>> getChildren(){
    return children;
}

public void addChild(File data){
    Node<File> child = new Node<>(data);
    child.setParent(this);
    this.children.add(child);
}

public void addChild(Node<File> child){
    child.setParent(this);
    this.children.add(child);
}

public void addChildren(List<Node<File>> children){
    children.forEach(each -> each.setParent(this));
    this.children.addAll(children);
}

public void setParent(Node<File> parent) {
    parent.addChild(this);
    this.parent = parent;
}

public File getData(){
    return this.data;
}

public void setData(File data){
    this.data = data;
}

public boolean isRoot(){
    return (this.parent == null);
}

public boolean isLeaf(){
    return this.children.isEmpty();
}

public Node<File> getParent(){
    return parent;
}

public Node<File> getRoot(){
    if(parent == null){return this;}
    return parent.getRoot();
}

public void remove(){
    if(parent!=null){
        parent.removeChild(this);
    }
}

private void removeChild(Node<File> child) {
    if(children.contains(child)){
        children.remove(child);
    }
}

}