// sets the length path
private void setDepth()
{
Node n = this;
while (n.getParent() != null)
{
depth++;
n = n.getParent();
}
}
// retrieves path from start of node tree
private Stack <Node> getPath(Node n)
{
Stack <Node> path = new Stack <Node>();
path.Push(n);
n = n.getParent();
while (n != null && n.getParent() != null)
{
path.Push(n);
n = n.getParent();
}
if (n != null)
{
path.Push(n);
}
return(path);
}